Assume that for a newborn, the probability to be a boy is the same as the probability to be a girl. If you randomly select  10 newborns, the probability that exactly four of them are boys is:

I understand that I must show my work for questions 11-15 by holding up my paper to the webcam during the exam so that it is visibleand submitting the work on the “Practice Test (Submit Your Work)” assignment that becomes available when I complete this test.

In a typical day, 30% of people in the United States with internet access go online to get news. You randomly select eight people in the United States with internet access and ask them if they go online to get news. Find the probability that the number of them who say they don’t go online to get news is more than two but less than 6

For the next three questions, you will have to complete the work on a separate paper to show your work and present your answer. After you have completed each question, hold up your work the webcam. Once you have submitted the test, an assignment will be available for you to submit your work via scan/photo.

A random sample of forty-eight 200-meters swims has a mean time of 3.12 minutes with a standard deviation of 0.09 minutes. Construct a 98% Confidence interval for the population mean time of 200 -meters swims. Show your work. Do not submit your work here. Hold up your work to the webcam when you are done. Once you have submitted the test, you will upload your work on a separate assignment which will unlock after completing this test.

Find the critical value for a confidence level of and

For the stem and leaf plot below, what is the range of the data set?

For a two-tailed test for the population mean

Find the critical values for a right tail test, with alpha=0.10 and n = 7

In testing a claim about the population mean