Question

can you help me solve this statistics problem? I need the p-value. Thanks.

(1 point) All Carroll statistics students are assigned to randomly select a sample of 40 people from the Helena community and measure how much time it takes them to solve a word search puzzle. Each student takes the average of the 40 times and submits this average The table below gives the distribution of these averages. The first bin contains all averages less than or equal to 15. The second bin contains all averages greater than 15 and less than or equal to 30, and so forth Average Time to Solve Puzzle (sec)< 1515-30 30-4545-6060-7575-90 90-105105-120 120-135135-150 150 Number of Statistics Students 2 4 9 10 26 27 24 19 2 3 At the same time that the students are gathering their data, a professor randomly selects a sample of 40 Helena resident and has them do the same puzzle. However, before the 40 people do the puzzle, the professor first has these 40 people spend one minute doing mental relaxation exercises, to see if this helps people to do the puzzle faster. The professor then calculates that the average of these 40 times is 45 seconds What is the null hypothesis? A. Doing mental relaxation exercises has no effect on the time it takes to solve the puzzle B. Doing mental relaxation exercises makes people solve the puzzle faster C. Doing mental relaxation exercises makes people solve the puzzle slower. How many statistics students submitted data? 127 Using the table of data, estimate the p-value of the professor's result For this analysis we will use a significance level of a0.05. What should we conclude regarding the null hypothesis? A. We should reject the null hypothesis B. We cannot reject the null hypothesis

Answer 1

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