Mathxl. com/Student/PlayerTest. aspx?testid=214981316&centerwin =yes
AP Statistics - Period 6
Test: 3rd GP Mastery Test
This Question: 1 pt
Livestock are given a special feed supplement to see if it will promote weight gain. Researchers report that the 77 cows studied gained an aver
conclusions. Did anyone interpret the interval correctly? Explain any misinterpretations. Complete parts a through e below.
a) 95% of the cows studied gained between 45 and 67 pounds.
Is this a correct interpretation of the confidence interval? Choose the correct answer below.
O A. The interpretation is incorrect. The confidence interval estimates the sample mean, not the population mean.
O B. The interpretation is incorrect. 100% of the cows studied gained between 45 and 67 pounds.
O C. The interpretation is incorrect. The confidence interval is for the population mean, not the individual cows in the study.
OD. The interpretation is correct, assuming all conditions and assumptions are met.