Answer Happy

Question 10 2 pts Assume that the yield per acre for a new variety of yellow corn follows a Normal distribution with an unknown mean pe with known a = 17.5. An agricultural researcher plants 25 plots with the new variety of yellow corn. The sample mean yield is č = 150 bushels per acre, and a 90% confidence interval for p is found to be (146.5, 153.5). Which one of the following statements is TRUE about the 90% confidence interval for je? If we took many many random samples of size 25, 90% of the samples give a confidence interval that covers The probability that he is between 146.5 and 153.5 is 90%. If we took many many random samples of size 25, will fall between 146.5 and 153.5 about 90% of the time. To decrease the margin of error with the same sample size, we need to increase the confidence level.

Question 9 2 pts To construct a 90% t confidence interval with a simple random sample with size 25, what is the t critical value? O 1.711 2.060 2.064 1.708