Questions from Statistics

Q: Use the sample data listed in Exercise 17 with a 0.

Use the sample data listed in Exercise 17 with a 0.05 significance level to test the claim that the sample is from a population with a mean equal to 1000 cm3.

Q: Use the sample data listed in Exercise 18 with a 0.

Use the sample data listed in Exercise 18 with a 0.05 significance level to test the claim that the sample is from a population with a mean less than 1.6 W/kg.

Q: What is the t distribution? What factors determine its shape?

What is the t distribution? What factors determine its shape? Describe conditions under which you could use a t distribution instead of a normal distribution when making inferences about a population...

Q: How do you determine the number of degrees of freedom when using

How do you determine the number of degrees of freedom when using a t distribution? Once you know this number, how do you find the critical value of t that you will need for building a confidence inter...

Q: Briefly summarize the procedure for constructing a 95% confidence interval around

Briefly summarize the procedure for constructing a 95% confidence interval around a sample mean when using the t distribution. What is the difference between the procedures using the normal and t dist...

Q: Briefly summarize the procedure for conducting a hypothesis test for a population

Briefly summarize the procedure for conducting a hypothesis test for a population mean when using the t distribution. What is the difference between the procedures using the normal and t distributions...

Q: In a two-way table for major and gender, the

In a two-way table for major and gender, the observed frequencies were very different from the expected frequencies, so I concluded that major and gender is independent variables.

Q: If two different subjects are randomly selected without replacement, find the

If two different subjects are randomly selected without replacement, find the probability that they both lied.

Q: In a two-way table, all of the observed frequencies

In a two-way table, all of the observed frequencies are very close to the expected frequencies, so the  2 statistics is very small.

Q: In a two-way table, all of the observed frequencies

In a two-way table, all of the observed frequencies are lower than the expected frequencies, so the  2 statistic is negative.