Question

A population mean is to be estimated from the sample described. Round your answer to one decimal place if necessary. Assume that all confidence intervals use a 95% confidence level.

Sample size = 100, sample mean = 48, sample standard deviation = 14

What is the margin of error?

a		1.4
b		2.8
c		9.6
d		0.3

Select the sample most representative of the population of interest.

A researcher wants to determine the status of the electorate one month before the presidential election.

a		A group of 30 persons contacted by phone with the numbers randomly chosen numbers
b		A random group of 30 persons in the phone book
c		A group of 30 persons on the voter registration list
d		A group of 30 persons from church who voted in the last election

State whether the actual data are discrete or continuous and explain why.

The temperatures in Manhattan at noon for each New Year's Day

a		Continuous because the numbers can have any value within some range of values
b		Discrete because only counting numbers are used, and no values between the counting numbers are possible

Apply the Empirical Rule to answer the question.

A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. What percentage of the ratings will be between 200 and 300?

a		34%
b		68%
c		95%
d		47.5%

A study conducted at a certain college shows that 63% of the school's graduates find a job in their chosen field within a year after graduation. Find the probability that among 4 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.

	a	0.981
	b	0.909
	c	0.019
	d	0.830

population mean is to be estimated from the sample described. Round your answer to one decimal place if necessary. Assume that all confidence intervals use a 95% confidence level.

Sample size = 100, sample mean = 48, sample standard deviation = 14

What is the margin of error?

a		1.4
b		2.8
c		9.6
d		0.3

Select the sample most representative of the population of interest.

A researcher wants to determine the status of the electorate one month before the presidential election.

a		A group of 30 persons contacted by phone with the numbers randomly chosen numbers
b		A random group of 30 persons in the phone book
c		A group of 30 persons on the voter registration list
d		A group of 30 persons from church who voted in the last election

State whether the actual data are discrete or continuous and explain why.

The temperatures in Manhattan at noon for each New Year's Day

a		Continuous because the numbers can have any value within some range of values
b		Discrete because only counting numbers are used, and no values between the counting numbers are possible

Apply the Empirical Rule to answer the question.

A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. What percentage of the ratings will be between 200 and 300?

a		34%
b		68%
c		95%
d		47.5%

A study conducted at a certain college shows that 63% of the school's graduates find a job in their chosen field within a year after graduation. Find the probability that among 4 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.

	a	0.981
	b	0.909
	c	0.019
	d	0.830

Answer 1

Part A: -

Part B: -

The correct option is: - "C"

"A group of 30 persons on the voter registration list"

Part C: -

The answer is option "A"

"Continuous because the numbers can have any value within some range of values"

Part D: -

Part E: -

End of the Solution...