q21

QUESTION 21 - 1 POINT Given the plot of normal distributions A and B below, which of the following statements is true? The vertical scales fi and B are different. Select all correct answers. Select all that apply: A has the larger mean. B has the larger mean. The means of A and B are equal. A has the larger standard deviation. B has the larger standard deviation. O O o o o o The standard deviations of A and B are equal. QUESTION 22 - 1 POINT A statistics professor recently graded final exams for students in her introductory statistics course. In a review of her grading, she found the mean score out of 100 points was a = 77, with a margin of error of 10. Construct a confidence interval for the mean score (out of 100 points) on the final exam. Provide your answer below: (3 J FEEDBACK Content attribution QUESTION 23 - 1 POINT What is the p-value of a right-tailed one-mean hypothesis test, with a test statistic of zg = 1.74? (Do not round your answer; compute your answer using a value from the table below.) z | 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 1.5 | 0.933 0934 0936 0937 0.938 0.939 0.941 0.942 0.943 0.944 1.6 | 0.945 0946 0.947 0948 0.949 0.951 0.952 0.953 0.954 0.954 1.7 | 0955 0.956 0.957 0958 0.959 0.960 0.961 0.962 0.962 0.963 1.8 | 0964 0965 0.966 0966 0967 0968 0969 0969 0970 0.971 1.9 0971 0972 0973 0.973 0974 0974 0975 0976 0976 0.977 Provide your answer below: QUESTION 24 . 1 POINT A researcher claims that the proportion of cars with manual transmission is less than 10%. To test this claim, a survey checked 1000 randomly selected cars. Of those cars, 95 had a manual transmission. The following is the setup for the hypothesis test: Ho : p 2 0.10 Ha : p 33