Question 1

Instruction 7-6
According to an article,19% of the entire Australian population have high-speed access to the Internet.Random samples of size 200 are selected from the Australian population.
-Referring to Instruction 7-6,the standard error of all the sample proportions is ________.

Accepted Answer

The answer of Instruction 7-6
According to an article,19% of the...

Question 2

Instruction 7-6
According to an article,19% of the entire Australian population have high-speed access to the Internet.Random samples of size 200 are selected from the Australian population.
-Referring to Instruction 7-6,the population mean of all the sample proportions is ________.

Accepted Answer

The answer of Instruction 7-6
According to an article,19% of the...

Question 3

Instruction 7-6
According to an article,19% of the entire Australian population have high-speed access to the Internet.Random samples of size 200 are selected from the Australian population.
-Referring to Instruction 7-6,among all the random samples of size 200,________% will have less than 20% who have high-speed access to the Internet.

Accepted Answer

The answer of Instruction 7-6
According to an article,19% of the...

Question 4

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If random samples of size 75 are selected,the standard error of the proportions of students in the samples who are minority students is ________.

Accepted Answer

The answer of A study at a university in New...

Question 5

Instruction 7-4
According to a survey,only 15% of customers who visited the web site of a major retail store made a purchase.Random samples of size 50 are selected.
-Referring to Instruction 7-4,90% of the samples will have less than what percentage of customers who will make a purchase after visiting the web site?

Accepted Answer

The answer of Instruction 7-4
According to a survey,only 15% of...

Question 6

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.The expected percentage of minority students in their next batch of first-year students is ________.

Accepted Answer

The answer of A study at a university in New...

Question 7

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If random samples of size 75 are selected,80% of the samples will have less than ________% of minority students.

Accepted Answer

The answer of A study at a university in New...

Question 8

Instruction 7-4
According to a survey,only 15% of customers who visited the web site of a major retail store made a purchase.Random samples of size 50 are selected.
-Referring to Instruction 7-4,what proportion of the samples will have between 20% and 30% of customers who will make a purchase after visiting the web site?

Accepted Answer

The answer of Instruction 7-4
According to a survey,only 15% of...

Question 9

Instruction 7-4
According to a survey,only 15% of customers who visited the web site of a major retail store made a purchase.Random samples of size 50 are selected.
-Referring to Instruction 7-4,what is the probability that a random sample of 50 will have at least 30% of customers who will make a purchase after visiting the web site?

Accepted Answer

The answer of Instruction 7-4
According to a survey,only 15% of...

Question 10

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If a random sample of size 75 is selected,the probability is ________ that more than half of the students in the sample will be minority students.

Accepted Answer

The answer of A study at a university in New...

Question 11

Instruction 7-6
According to an article,19% of the entire Australian population have high-speed access to the Internet.Random samples of size 200 are selected from the Australian population.
-Referring to Instruction 7-6,among all the random samples of size 200,________% will have between 14% and 24% who have high-speed access to the Internet.

Accepted Answer

The answer of Instruction 7-6
According to an article,19% of the...

Question 12

Instruction 7-6
According to an article,19% of the entire Australian population have high-speed access to the Internet.Random samples of size 200 are selected from the Australian population.
-Referring to Instruction 7-6,among all the random samples of size 200,________% will have between 9% and 29% who have high-speed access to the Internet.

Accepted Answer

The answer of Instruction 7-6
According to an article,19% of the...

Question 13

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If random samples of size 75 are selected,95% of the samples will have more than ________% of minority students.

Accepted Answer

The answer of A study at a university in New...

Question 14

The standard error of the population proportion will become larger

Accepted Answer

The standard error of the population proportion becomes larger as the population proportion approaches 0.50 because the formula for the standard error of a proportion includes the term sqrt[p(1-p)/n], where p is the population proportion and n is the sample size. The value of p(1-p) reaches its maximum at p = 0.5, making the standard error largest at this point.

Question 15

Instruction 7-6
According to an article,19% of the entire Australian population have high-speed access to the Internet.Random samples of size 200 are selected from the Australian population.
-Referring to Instruction 7-6,among all the random samples of size 200,________% will have more than 30% who have high-speed access to the Internet.

Accepted Answer

The answer of Instruction 7-6
According to an article,19% of the...

Question 16

To use the normal distribution to approximate the binomial distribution,we need ________ and ________ to be at least 5.

Accepted Answer

The answer of To use the normal distribution to approximate...

Question 17

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If a random sample of size 75 is selected,the probability is ________ that between 30% and 50% of the students in the sample will be minority students.

Accepted Answer

The answer of A study at a university in New...

Question 18

Instruction 7-4
According to a survey,only 15% of customers who visited the web site of a major retail store made a purchase.Random samples of size 50 are selected.
-Referring to Instruction 7-4,90% of the samples will have more than what percentage of customers who will make a purchase after visiting the web site?

Accepted Answer

The answer of Instruction 7-4
According to a survey,only 15% of...

Question 19

Instruction 7-4
According to a survey,only 15% of customers who visited the web site of a major retail store made a purchase.Random samples of size 50 are selected.
-Referring to Instruction 7-4,what proportion of the samples will have less than 15% of customers who will make a purchase after visiting the web site?

Accepted Answer

The answer of Instruction 7-4
According to a survey,only 15% of...

Question 20

Instruction 7-4
According to a survey,only 15% of customers who visited the web site of a major retail store made a purchase.Random samples of size 50 are selected.
-Referring to Instruction 7-4,the standard deviation of all the sample proportions of customers who will make a purchase after visiting the web site is ________.

Accepted Answer

The answer of Instruction 7-4
According to a survey,only 15% of...

Quiz 7: Sampling Distributions

Instruction 7-6 According to an article,19% of the entire Australian population have high-speed access to the Internet.Random samples of size 200 are selected from the Australian population. -Referring to Instruction 7-6,the standard error of all the sample proportions is ________.

Instruction 7-6 According to an article,19% of the entire Australian population have high-speed access to the Internet.Random samples of size 200 are selected from the Australian population. -Referring to Instruction 7-6,the population mean of all the sample proportions is ________.

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If random samples of size 75 are selected,the standard error of the proportions of students in the samples who are minority students is ________.

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.The expected percentage of minority students in their next batch of first-year students is ________.

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If random samples of size 75 are selected,80% of the samples will have less than ________% of minority students.

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If a random sample of size 75 is selected,the probability is ________ that more than half of the students in the sample will be minority students.

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If random samples of size 75 are selected,95% of the samples will have more than ________% of minority students.

The standard error of the population proportion will become larger

To use the normal distribution to approximate the binomial distribution,we need and to be at least 5.

A study at a university in New South Wales reveals that,historically,45% of their students are minority students.If a random sample of size 75 is selected,the probability is ________ that between 30% and 50% of the students in the sample will be minority students.