Question

In: Statistics and Probability

1) A sample proportion is expected to change going from one sample to the next. This...

1)

A sample proportion is expected to change going from one sample to the next. This is due to..

the chosen confidence level.

the law of large numbers.

sampling variability.

bias sampling methods.

2)

In the following please select whether a hypothesis test or a confidence interval is most appropriate.

  A ski resort wants to know the proportion of people who rent skiing gear.

A library wants to know what proportion of people regularly return books past due.

The university is interested in seeing if the proportion of females who enroll in STEM majors is equal to the proportion of males who enroll in STEM majors.

A farmer is interested in the proportion of their chickens' eggs that have 2 yolks in them

12)

Which of these is the correct meaning for N(6, 10) in statistics?

This is a normal distribution with mean 10 and standard deviation 6.

This is a sample with sample size N, a mean of 6 and a standard deviation of 10.

This is a normal distribution with mean 6 and standard deviation 10.

This is a sample with sample size N, a mean of 10 and a standard deviation of 6.

Solutions

Expert Solution

1)

A sample proportion is expected to change going from one sample to the next. This is due to

As the more sample is drawn the statistic changes, hence, the correct option is:

sampling variability.

2)

In the following please select whether a hypothesis test or a confidence interval is most appropriate.

  A ski resort wants to know the proportion of people who rent skiing gear.

Since, there is no comparison to a given value hence, confidence interval.

A library wants to know what proportion of people regularly return books past due.

Since, there is no comparison to a given value hence, confidence interval.

The university is interested in seeing if the proportion of females who enroll in STEM majors is equal to the proportion of males who enroll in STEM majors.

Since, there is confusion among two groups, hence, hypothesis test

A farmer is interested in the proportion of their chickens' eggs that have 2 yolks in them

Since, there is no comparison to a given value hence, confidence interval.

12)

Which of these is the correct meaning for N(6, 10) in statistics?

This is a normal distribution with mean 6 and standard deviation 10.

orchestra answered 1 year ago
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