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BA 210 Business Statistics for Business & Economics Professor Ji University of Guam Summer Intersession 2018Exam 4Students are required to submit the completed exam as a separate answer sheet using Excel. Show ALL work or where indicated (On subsequent EXCEL sheets) or no credit will be given. Name of document should be “210.lastname.e4”. GOOD LUCK!True / False Questions (1 pt. each) No work needs to be shown for this section1) Alpha is the risk of not rejecting the null hypothesis when it is actually
true. True False2) If the null hypothesis is false and the researchers do not reject it, then a
Type II error has been made. True False3) A p-value is the same as a stated (alpha) significance level.True False4) The probability of a Type II error is represented by the Greek symbol, .β5) In testing the difference between two population proportions, we pool the
two sample proportions to estimate the population proportion. True False6) The pooled estimate of the proportion is found by dividing the total
number of samples by the total number of successes. True False7) When the population standard deviations are equal but known, a test for
the differences between two population means has n2 - 2 degrees of freedom. True FalseMultiple Choice Questions (1 pt. ea.) Show ALL work for this section
8) A manufacturer wants to increase the lead-time to get items delivered.Past records indicate that the average lead-time is 216 days. After a new process has been utilized, a sample of nine times shipped had lead times (in days): 215, 215, 216, 215, 215, 216, 216, 216 and 215. At the 0.01 level, has the lead time of items decreased?