Explaining left-tailed-right-tailed or two-tailed

Assignment Help Basic Statistics

Reference no: EM1320453

Q1) Manager at Air Express claims that weights of packages shipped recently are less than in the past. Records illustrate that, in past years, packages have had mean weight of 36.7 lbs. So he took sample of 64 packages from last month's shipping records and found that their mean weight was 32.1 lbs. with standard deviation of 14.2. Find out whether this is enough evidence to accept or reject manager's null hypothesis, using alpha = .01.

a) Is this test left-tailed, right-tailed or two-tailed?

b) What is the critical value?

c) What is the test statistic value?

d) What is the P value?

e) Is Ho accepted or rejected?

Q2) Ticket broker feels that number of employees company has and number of sports tickets a corporation will purchase for "perks" are correlated. If correlated, marketer may focus on selling to specific size of company. Last year's sales yielded these data where X= number of employees and Y= number of tickets sold (questions 32-33, 4 and 1 pts., respectively).

X: 15 26 31 280 300 312 390

Y: 0 2 2 6 6 4 16

Reference no: EM1320453

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