Rosanne wanted to know if there was a connection between her coffee consumption and how well she slept that night. For weeks, Rosanne recorded how many cups of coffee she drank in
the morning and how many hours she slept that night.
6 hours 7 hours
3
3
O cups of coffee
1 cup of coffee
3
1
What is the probability that a randomly selected day is one when she drank exactly O cups of
coffee and is one when she slept exactly 6 hours?
Simplify any fractions.
Submit

Atest of sobriety involves measuring the subject's motor skills. a sample of 31 randomly selected sober subjects take the test and produce a mean score of 64.4 with a standard deviation of 2. a claim is made that the true mean score for all sober subjects is equal to 65. for each part below, enter only a numeric value in the answer box. for example, do not type "z =" or "t =" before your answers. round each of your answers to 3 places after the decimal point. (a) calculate the value of the test statistic used in this test. test statistic's value = (b) use your calculator to find the p-value of this test. p-value = (c) use your calculator to find the critical value(s) used to test this claim at the 0.2 significance level. if there are two critical values, then list them both with a comma between them. critical value(s) =