Question 1

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Forty percent of all students at a large university live on campus.Suppose you extract a sample of 115 students from this university.The sample proportion is the proportion of students in this sample who live on campus.
-The standard deviation of the sampling distribution of this sample proportion,rounded to four decimal places,is:

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Forty...

Question 2

The standard deviation of the sampling distribution of the sample proportion is equal to:

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Question 3

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Suppose that 6.5% or all persons are allergic to penicillin .A sample of 561 persons is selected.
-The probability that less than 8% of persons in the sample of will be allergic to penicillin,rounded to four decimal places,is approximately:

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Suppose...

Question 4

Suppose the proportion of elements of a population that possess a certain characteristic is 0.34.Assuming  ,the probability that the sample proportion for a sample of 472 elements drawn from this population is more than .33,rounded to four decimal places,is approximately:

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Question 5

In a sample of 859 adults,437 are in favor of banning all advertisements relating to alcohol.The proportion of these adults who are in favor of banning all advertisements relating to alcohol,rounded to three decimal places,is:

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Question 6

The sampling distribution of the sample proportion is approximately normal if:

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Question 7

A company has 411 employees and 104 of them are college graduates.The proportion of employees of this company who are college graduates,rounded to three decimal places,is:

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Question 8

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A study shows 18.0% of all adult males did not visit their physicians' offices last year.A sample of 623 adult males is selected.
-The probability that more than 18% of adult males in the sample did not visit their physicians' offices last year,rounded to four decimal places,is approximately:

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A...

Question 9

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A study shows 18.0% of all adult males did not visit their physicians' offices last year.A sample of 623 adult males is selected.
-The probability that less than 22.5% of adult males in the sample did not visit their physicians' offices last year,rounded to four decimal places,is approximately:

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A...

Question 10

The time spent commuting from home to work for all employees of a very large company has a normal distribution with a mean of 43.4 minutes and a standard deviation of 12.1 minutes.The probability,rounded to four decimal places,that the mean time spent commuting from home to work by a sample of 21 employees will be between 43.26 and 49.35 minutes is:

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Question 11

A class of 61 students has 15 seniors.The proportion of students in this class who are seniors,rounded to three decimal places,is:

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Question 12

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Thirty-five percent of all adults read at least one newspaper daily.Suppose you select a sample of 486 adults.The sample proportion is the proportion of adults in this sample who read at least one newspaper daily.
-The mean of the sampling distribution of this sample proportion is:

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Thirty-five...

Question 13

The mean of the sampling distribution of the sample proportion is equal to the population:

Accepted Answer

The mean of the sampling distribution of the sample proportion is equal to the population proportion, according to the properties of sampling distributions.

Question 14

Use the following to answer questions :
Suppose that 6.5% or all persons are allergic to penicillin .A sample of 561 persons is selected.
-The probability that 7.5% to 9% of persons in a the sample will be allergic to penicillin,rounded to four decimal places,is approximately:

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Suppose...

Question 15

Suppose the proportion of elements of a population that possess a certain characteristic is 0.62.Assuming  ,the probability that the sample proportion for a sample of 120 elements drawn from this population is between .62 and .67,rounded to four decimal places,is approximately:

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Question 16

If you divide the number of elements in a population with a specific characteristic by the total number of elements in the population,the dividend is the population:

Accepted Answer

The proportion is the number of elements in a population with a specific characteristic divided by the total number of elements in the population.

Question 17

Use the following to answer questions :
Forty percent of all students at a large university live on campus.Suppose you extract a sample of 115 students from this university.The sample proportion is the proportion of students in this sample who live on campus.
-The mean of the sampling distribution of this sample proportion is:

Accepted Answer

The answer of Use the following to answer questions :
Forty...

Question 18

Use the following to answer questions :
Thirty-five percent of all adults read at least one newspaper daily.Suppose you select a sample of 486 adults.The sample proportion is the proportion of adults in this sample who read at least one newspaper daily.
-The standard deviation of the sampling distribution of this sample proportion,rounded to four decimal places,is:

Accepted Answer

The answer of Use the following to answer questions :
Thirty-five...

Question 19

In the case of proportion,the sample size is large if:

Accepted Answer

For a sample size to be considered large in the context of proportions, both np and nq should be greater than 5, where n is the sample size, p is the probability of success, and q is the probability of failure (q = 1 - p). This ensures the sampling distribution of the proportion is approximately normal.

Question 20

If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample,the dividend is the:

Accepted Answer

The sample proportion is the number of elements in a sample with a specific characteristic divided by the total number of elements in the sample.

Quiz 7: Sampling Distributions

The standard deviation of the sampling distribution of the sample proportion is equal to:

Use the following to answer questions : Suppose that 6.5% or all persons are allergic to penicillin .A sample of 561 persons is selected. -The probability that less than 8% of persons in the sample of will be allergic to penicillin,rounded to four decimal places,is approximately:

Suppose the proportion of elements of a population that possess a certain characteristic is 0.34.Assuming ,the probability that the sample proportion for a sample of 472 elements drawn from this population is more than .33,rounded to four decimal places,is approximately: