Write the null and alternative hypotheses in for the situation "A tutoring company would like to understand if most students tend to improve their grades after they use their service. They sample 200 of the students who used their service in the past year and ask them if their grades have improved or declined from the previous year" *
Answers
Step-by-step explanation:
tutoring company would like to understand if most students tend to improve their grades (or not) after they use their services. They sample 200 of the students who used their service in the past year and ask them if their grades have improved or declined from the previous year.
In symbols, the hypotheses are:
Ho: p = 100
Ha: p > 100
Ho: p = 0.50
Ha: p ≥ 0.51
Ho: p = 0.50
Ha: p > 0.50
Ho: p = 100
Ha: p ≥ 101
(b) Employers at a firm are worried about the effect of March Madness, a basketball championship held each spring in the US, on employee productivity. They estimate that on a regular business day employees spend on average 15 minutes of company time checking personal email, making personal phone calls, etc. They also collect data on how much company time employees spend on such non-business activities during March Madness. They want to determine if these data provide convincing evidence that employee productivity changed during March Madness.