Questions from Statistics Principles

Q: Suppose you have two populations: Population A—All students at

Suppose you have two populations: Population A—All students at Illinois State University (N = 21,000) and Population B—All residents of the city of Homer Glen, IL (N = 21,000). You want to estimate th...

Q: Population A has standard deviation / and population B has standard deviation

Population A has standard deviation / and population B has standard deviation /How many times larger than Population A’s sample size does Population B’s need to be to estimate  with the same margin o...

Q: As the number of degrees of freedom in the t-distribution

As the number of degrees of freedom in the t-distribution increases, the spread of the distribution________ (increases/ decreases).

Q: The notation ta is the t-value such that the area

The notation ta is the t-value such that the area under the t-distribution to the right of ta is______ .

Q: State the properties of Student’s t-distribution.

State the properties of Student’s t-distribution.

Q: Put the following in order from least to greatest. •

Put the following in order from least to greatest. • t0.10 with 5 degrees of freedom • t0.10 with 15 degrees of freedom • z0.10

Q: What requirements must be satisfied in order to construct a confidence interval

What requirements must be satisfied in order to construct a confidence interval about a population mean?

Q: A simple random sample of size n = 300 individuals who are

A simple random sample of size n = 300 individuals who are currently employed is asked if they work at home at least once per week. Of the 300 employed individuals surveyed, 35 responded that they did...

Q: A simple random sample of size n = 785 adults was asked

A simple random sample of size n = 785 adults was asked if they follow college football. Of the 785 surveyed, 275 responded that they did follow college football. Construct a 95% confidence interval f...

Q: A simple random sample of size n = 12 is drawn from

A simple random sample of size n = 12 is drawn from a population that is normally distributed. The sample mean is found to be / = 45, and the sample standard deviation is found to be s = 14. Construct...