b) The university gym opens at 9 am on Saturday mornings. One Saturday morning at 8:55 am there are 15 students outside the gym waiting for it to open. Should you use the same approach from part (a) to calculate the expected number of smokers among these 15 students

Answers

Answer 1

Answer:

The complete question is:

At a university, 13% of students smoke.

a) Calculate the expected number of smokers in a random sample of 100 students from this university:

b) The university gym opens at 9 am on Saturday mornings. One Saturday morning at 8:55 am there are 27 students outside the gym waiting for it to open. Should you use the same approach from part (a) to calculate the expected number of smokers among these 27 students?

Part a is easy, because is a random sample, we can expect that just 13% of these 100 students to be smokers, and 13% of 100 is 13, so we can expect 13 of those 100 students to be smokers.

b) This time we do not have a random sample, our sample is a sample of 15 students who go to the gym in the early morning, so our sample is biased. (And we do not know if this bias is related to smoking or not, and how that relationship is), so we can't use the same approach that we used in the previous part.


Related Questions

3x + 5y = 7;( -1 , 2) write an eqautian thats perpidicaluar to the given line that passes through the given point

Answers

Answer:

5x -3y + 11 = 0 .

Step-by-step explanation:

Firstly let's find the slope of the line by converting the equation into slope intercept form as ,

=> 3x +5y = 7

=> 5y = 7 - 3x

=> y = (7-3x)/5

=> y = -3/5x + 7/5

On comparing this equation to the slope intercept form y = mx + c ,

=> m = -⅗

Now the slope of the line perpendicular to this line will be , say m'

=> m' =- 1/m

=> m' = -1/-⅗

=> m = 5/3

Now the line passes through (-1,2 ) . so on using point slope form , we get ,

=> ( x - x1) m = ( y - y1)

=> ( x - (-1)) × 5/3 = y - 2

=> ( x +1)×5 = 3( y -2)

=> 5x + 5 = 3y -6

=> 5x - 3y +5 +6=0

=> 5x -3y +11 = 0

Hence the equation of line perpendicular to the given line is 5x -3y + 11 = 0 .

I-Ready Surface area of composed figures what is the surface area of this design

Answers

Answer: 512

Step-by-step explanation:

Hello, I hope the answer is correct if not let me know and i will work step by step on it with you. Your welcome and Happy to help.

The surface area of the design is 384 inches².

What is Surface Area?

The area of a three dimensional object on it's outer surface is called the surface area of the object.

The given design is a cube.

All the sides are of the length 8 inches.

The formula to find the surface area of a cube is,

Surface area = 6a², where "a" is the length of a side of the cube.

Given, a = 8 inches

Surface area of the design = 6 × 8²

                                             = 6 × 64

                                             = 384 inches²

Hence the given design has the surface area of 384 inches².

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The relative values of the mean and median for the original data set are typical of data that have a significant skew to the right. What are the relative values of the mean and median for the original data set

Answers

Answer: Your question has some missing data attached below is the missing data

Answer : Mean value is Greater

Step-by-step explanation:

The relative value of the mean for original data set is greater

Relative value of median for original data set is lesser

This is simply because the The distribution is generally skewed to the right ( Right skewed )

Can someone help me please

Answers

Answer:

It's 2/15

Step-by-step explanation:

Rice weighing 33/4 pounds was divided equally and placed in 4 containers. How many ounces of rice were in each?

Answers

Answer:

The answer is 15 ounces

Step-by-step explanation:

33/4 ÷ 4 pounds.

(4 × 3 + 3)/4 ÷ 4 pounds.

15/4 ÷ 4 pounds.

15/4 × 1/4 pounds.

15/16 pounds.

Now we know that, 1 pound = 16 ounces.

So, 15/16 pounds = 15/16 × 16 ounces = 15 ounces.

Thus, The answer is 15 ounces

Which two do i pick ? Evaporation changes gas / liquid water to ice (solid) / water vapor (gas).

Answers

Evaporation changes liquid water and even solid water (ice) to water vapor, which is a gas. This all part of the water cycle! Hope this helps!!

Answer:

Evaporation changes liquid water and even soled water (ice) to water vapor, which is a gas. This all part of the water cycle

Step-by-step explanation:

thank you

1. Name the angle below in four ways. Then classify it as acute, right, obruse, or straight.
Please anwser :/​

Answers

Answer:

Ok so I know the angle is acute

Step-by-step explanation:

because the angle looks smaller than a 90 degree angle...

Kind of easy giving alot points to anyone who knows​

Answers

Answer:

5 hours

Step-by-step explanation:

Find the 14th term of the arithmetic sequence x-4, 7x-9, 13x-14, ...

Answers

Answer:

14x-9

Step-by-step explanation:

Nolan plots the y-intercept of a line at (0, 3) on the y-axis. He uses a slope of 2 to graph another point. He draws a line
through the two points. Which equation represents Nolan's line?
O y = 2x + 1
O y = 2x +3
O y = ax + 2
O y = 3x + 5

Answers

Answer:

O y = 2x + 3

Step-by-step explanation:

if f (x)=x^2+1 and g(x) =x-4 which value is equivalent to f x g

Answers

Answer:

A value of [tex]x^3 - 4x^2 + x - 4[/tex] is equivalent to [tex]f \times g[/tex]

Step-by-step explanation:

We are given the following functions:

[tex]f(x) = x^2 + 1[/tex]

[tex]g(x) = x - 4[/tex]

Which value is equivalent to f x g?

We multiply these functions, applying the distributive property. So

[tex]f \times g = (x^2+1)(x-4) = x^3 - 4x^2 + x - 4[/tex]

A value of [tex]x^3 - 4x^2 + x - 4[/tex] is equivalent to [tex]f \times g[/tex]

1+2+3+4+5+6+7+8+9+10=

im bor*ed...pls ch*at with me???

Answers

= 55

heyyy :)

…………….

how do you find the answer?5y+8=-6​

Answers

Answer:

Step-by-step explanation:

5y+8=-6

-8

5y=-14/5

y=-2.8

Answer:

y = - 2.8

[tex]y=-2\frac{4}{5}[/tex]

Step-by-step explanation:

5y + 8 = - 6

5y + 8 - 8 = - 6 - 8

5y = - 14

5y ÷ 5 = - 14 ÷ 5

y = - 2.8

please help school is literally about to end

Answers

Answer:

192 is the answer

Step-by-step explanation:

Answer:

SA = 272 sq in

Step-by-step explanation:

SA = 2(8 x 2) + 2(8 x 12) + 2(2 x 12)

= 2(16) + 2(96) + 2(24)

= 32 + 192 + 48

= 272 sq in

HELP!!! WILL GIVE BRAINLIEST +LIKE AND 5 STARS ANSWER THE QUESTION IN THE PICTURE

Answers

Answer:

omg lol look at the picture are u that guy

Step-by-step explanation:

its me from web2.0 :KOBE2482

D its D

What is the median of this list of grades: 78,55,98,86,92,70,60 ?

Answers

Answer:

the median of this list is 78

Robert purchased 136/5 yards of fabric to make curtains. What is the amount of fabric he purchased expressed as a decimal?

Answers

Answer:

27.2

Step-by-step explanation:

all you have to do is divide the numerator by the denominator.

The amount of fabric he purchased expressed as a decimal will be;

⇒ 27.2

What is Decimal number?

A decimal number is a number that consists of a whole and a fractional part.

Given that;

Robert purchased 136/5 yards of fabric to make curtains.

Now,

Since, Robert purchased 136/5 yards of fabric to make curtains.

Hence, It can be written as;

⇒ 136/5 = 27.2

Thus, The amount of fabric he purchased = 27.2

Learn more about the decimal number visit:

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Joe drove 80 kilometers per hour for 4 hours. How far did he go?

Answers

Step-by-step explanation:

velocity = distance/time taken

distance=velocity ×time taken

distance=80×4

distance=320kilometers

he went 320kilometers

Find the length of side y.
y=_ft

Answers

Answer:

y= 18.582

⨝⨝⨝⨝⨝⨝⨝⨝⨝

1
ir fx) =
x+ 2, what is f(3+h)
(3+h)
O A. (x + 2)
1
O B. 3+h
1
c. (x+2)(3+h)
1
D. h+ 5

Answers

The correct answer to your question is d

The density of a solid bar is 25 pounds per cubic foot. If the bar has a volume of 5.2 cubic feet, what is the weight of the bar?

NO LINKS PLSSSS

Answers

Answer:

the weight of the bar is 130 pounds

Answer: realsies

Step-by-step explanation: w manz

Graduates A random sample of the average debt (in dollars) at graduation from 30 of the top 100 public colleges and universities is listed below. Is there sufficient evidence at a _ 0.01 to conclude that the population mean debt at graduation is less than $18,000? Assume s _ 2605
16,012 15,784 16,597 18,105 12,665 14,734
17,225 16,953 15,309 15,297 14,437 14,835
13,607 13,374 19,410 18,385 22,312 16,656
20,142 17,821 12,701 22,400 15,730 17,673
18,978 13,661 12,580 14,392 16,000 15,176
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results

Answers

Answer:

H0 : μ = 18000

H1 : μ < 18000 - - - > Claim

Test value = - 3.578

Critical value = ±2.58

There is significant evidence to accept the claim that mean debt at graduation is less than $18000

Step-by-step explanation:

H0 : μ = 18000

H1 : μ < 18000

From the data:

Sample size, n = 30

Sample mean, x = 16298.37

The test statistic :

(16298.37 - 18000) ÷ (2605/sqrt(30))

−1701.63 / 475.60575

= - 3.578

The critical value :

Using the standard normal table;

Critical value at α = 0.01

Critical value = ±2.58

Decison region :

|test statistic | > |Critical value | ; reject H0

|3.578| > |2.58| ; We reject H0 and conclude that Mean debt at graduation is less than $18000

The U.S. federal government conducts a survey of high school seniors concerning their plans for future education and employment. One question asks whether they are planning to attend a four-year college or university in the following year. Fifty percent answer yes to this question; that fifty percent is a: Question 2 options: parameter statistic variable data

Answers

Answer:

statistic

Step-by-step explanation:

ANSWERRRRRRRRRRRRRRRRRRRR PLZZZZZZZZZZZZZZzz

Answers

Answer:

-1/3

Step-by-step explanation:

Find two points on the line  (0,2) and (3,1)

Using the slope formula

m = (y2-y1)/(x2-x1)

   = (1-2)/(3-0)

   = -1/3

Answer:

A

Step-by-step explanation:

1) take two points of the line

A(0,2) ; B(3,1)

2) use this formula for find the slope

(y2-y1)/(x2-x1)

(1-2)/(3-0)

slope = -1/3

1) I can find my volume if the volume of the cylinder is multiplied
by Who am 1?
b. Prism
a. Cone
d. Sphere
c. Pyramid
2) The volume is that of a cylinder that has the same base and
height with me. Who am I?
c. Prism
d. Pyramid
a. Cone
b. Cylinder
3) The volume of the pyramid is of the volume of what figure?
a. Cone
b. Cylinder
C. Prism
d. Pyramid
4) A rectangular prism has 10 cm length, 4 cm width and 5 cm
height. What is the length of the rectangular pyramid?
d. 20 cm
b. 5 cm
c. 10 cm
a. 4 cm
Additional Activities
Directions: Solve the following. Show your solution.
1. Diane has clay in a can. Its radius is 6 cm, while its height is 10
cm. She wanted to transfer some of her clay to her cone-
shaped container. What is the volume of the cone to be filled
and height with the can?​

Answers

You can find the volume of a sphere by multiplying the volume of a cylinder by 4/3: D. sphere.

How to calculate the volume of a sphere?

Mathematically, the volume of a sphere can be calculated by using this formula:

V = 4/3 × πr³

Where:

V is the volume of a sphere.r is the radius of a sphere.

Note: The volume of a cylinder is equal to πr² × r.

Thus, 4/3 × πr² × r = 4/3 × πr³ (Volume of a sphere).

How to calculate the volume of a cone?

Mathematically, the volume of a cone is calculated by using this formula:

V = 1/3 × πr²h

Note: The volume of a cylinder is equal to πr²h.

Therefore, 1/3 × πr²h (volume of a cone).

How to calculate the volume of a pyramid?

Mathematically, the volume of a pyramid is calculated by using this formula:

Volume = 1/3 × base area × height

Volume = 1/3 × πr²h.

In Geometry, the length of a rectangular prism and the height of a rectangle pyramid are the same. Thus, the length of this rectangular pyramid is equal to 10 cm.

How to calculate the volume of Diane's cone?

Mathematically, the volume of a cone is calculated by using this formula:

V = 1/3 × πr²h

V = 1/3 × 3.14 × 6² × 10

Volume, V = 376.8 cm³.

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3353 8. A survey showed that 1/3 of the students in the class liked blue 1/4 of the remainder liked red. The remaining 24 students liked yellow. How many students were in the class?​

Answers

Answer: there are 48 students in the class

Step-by-step explanation:

let x = the total number of students in the class

1 - 1/3 = 2/3

1/4 * 2/3 = 2/12 = 1/6

1/3x + 1/6x + 24 = x

2/6x + 1/6x + 24 = x

3/6x + 24 = x

1/2x + 24 = x

24 = x - 1/2x

24 = 1/2x

24 * 2 = x

x = 48

there are 48 students in the class

Please help me due today !!

Answers

The 2nd one is the answer

$16000 increased by 20%



Tell me the answer plssss

Answers

Answer:

16,000, percentage increased by 20% (percent) of its value = 19,200

Step-by-step explanation:

Answer:

Hope the answer is by substracting

15999.8

Is this correct? the question is asking if the triangle would have a right, acute, or obtuse angle.

Answers

Answer:

Acute

Step-by-step explanation:

All triangles have to have a acute or it would be to big

Answer:

yes it is because its a triangle and its acute

How many total possible outcomes are there on a standard 6 sided die?​

Answers

Answer:

6 (may change if multiple number cubes are used; 2 dice = 6^2, 3=6^3, so on)

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What would the equation look like if youcompletely simplified the RIGHT SIDE ONLY?5 = 4(x 2) 7xA) 5 = 3x 2B) 12 = 4(x - 2)C) 5 = -6x + 8D) 5 = -3x 8 James is writing a report about honeybees. He found the following sources during his research.Source 1: The Honey BeeThe Honey Bee is an encyclopedia entry on a wiki page (a page that can be written and edited by anyone with access to the internet).Last modified in June 2017Source 2: Honey BeesHoney Bees is an online article by the United States Department of Agriculture (USDA).Published in February 2017Select one:Source 2Source 1 What is 4/8 + 1/4 simplified what is 3/5 + 2/10 simplified what is 1/3 + 3/9 simplified what is 2/10 +2/5 simplified and what is 3/6 + 2/12 simplified rewrite each expression as single exponent. Answer all of them Please!1} 11 to the second power times 11 to the tenth power2} 13 to the 6 power times 13 to the forth power3} 14 to the power 9 times 14 to the tenth power4} 2 to the power 4 times 2 to the forth power5} 7 to the 8 power times 7 to the 6 power 6} 3 to the power 3 times 3 to the 9 power What are New England town meetings used for?A. trying civil casesB. governing day-to-dayC. making general policyD. electing representatives On a piece of graph paper, graph the line that passes through point (-2,3) with a slope of 2/3. Give me the coordinates of a first quadrant point that lies on this line, and has integer coordinates. Which statement is true about human population today?A) Population is declining for the first time in history.B) Population is rapidly declining in urban areas.C) The time required to double the population is going down.D) Human population is now about 5 billion. Solve the inequality J+7>3j-4 Please help it would mean sm :))) Ill give BRAINLIST Which element, when combined with Fluorine, would form an COVALENT compound? A.LithiumB.IronC.PhosphorusD.Sodium Graph the ordered pair(4,6) and its reflection over the y-axis name the coordinates for the reflection Lets play devils advocate. What are two arguments you would use to support the claim that medical doctors and veterinarians do not need to collaborate in the way that Natterson-Horowitz is suggesting? Which is the equation of a hyperbola with directrices at x = 2 and foci at (5, 0) and (5, 0)? ABC and XYZ are similar find the missing side length If the perimeter of the polygon is 42, AB = ______? Solve for the value of n.please help CAN SOMEONE HELP ME PLEASE Why did the United States increase military spending under the presidency of Ronald Reagan? H e l p P l e a s e. Which of the following is an example of a colony?