3. Scores on a statistics exam are given: 85 72 92 90 74 65 6859 74 85 63 79 81 92 95 74 88 55
Use this data to calculate the:
A) mean __________ B) median ________ C) mode ________ D) range________
E) standard deviation _________ F) find the z-score for a testgrade of 90._______
G) Construct a stem and leaf display using this data.
H) Construct a box and whisker plot using this data.
I) Construct a 90% confidence interval for u.
J) Does this data provide sufficient evidence at the a = .05level of significance to conclude that the mean score is greaterthan 75?
K) State the appropriate hypotheses to conduct the test:
ii Calculate the value of the test-statistic
iii. Give the p-value of the test
iv. Using a 5% significance level, what is your conclusion?Why?
