Testing a Claim about a Difference between Means Answers

Let μAR = the true mean score for all games played at the arcade and μAM = the true mean score for all games played at the amusement park. What are the appropriate hypotheses?

reject✔ fail to reject

have✔ do not have

reject✔ fail to reject

Here is a t-distribution table.

✔ 9101415

✔ Less than 0.0005Between 0.01 and 0.02Between 0.02 and 0.025Between 0.025 and 0.05

✔ rejectfail to reject

✔ havedo not have

✔ 39407980

Less than 0.0005✔ Between 0.05 and 0.10Between 0.2 and 0.25Greater than 0.25

have✔ do not have

A real estate agent selects a random sample of 10 homes in the north hills and 10 homes in the south hills and finds the mean and standard deviation of their listing prices. Here are the data (in thousands of dollars):Do these data provide convincing evidence that the true mean listing price of homes in the north hills is less than homes in the south hills? Use α = 0.01.

Question text not available

Check the conditions for this two-sample t-test.

We want to test H0: μN − μS = 0 versus Ha: μN − μS < 0 where μN = the true mean listing price of all homes in the north hills and μS = the true mean listing price of all homes in the south hills.

Let μA = the true mean volume prior to bursting of all 15-inch balloons filled with air and μW = the true mean volume prior to bursting of all 15-inch balloons filled with water. What are the appropriate hypotheses? Check all that apply.

Check the conditions for this two-sample t-test.

Here is a t-distribution table.

We want to test H0: μS − μN = 0 versus Ha: μS − μN < 0 where μN = the true mean listing price of all homes in the north hills and μS = the true mean listing price of all homes in the south hills.The conditions for inference are met.Which expression gives the standardized test statistic?