nentary Statistics doaa shihab & Test: Chapters 8-10, 11.1 & 12.1 Exam 12/12/17
ID: 3322825 • Letter: N
Question
nentary Statistics doaa shihab & Test: Chapters 8-10, 11.1 & 12.1 Exam 12/12/17 5:36 PM Time Remaining: 01:23:25 Submit Test This Question: 1 pt 6 of 27 (0 complete) This Test: 27 pts possible Question Help Researc hers collec ted data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on the following 13th of the same month. Use a 0.05 significance level to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motor vehicle crashes are not affected Friday the 6th Friday the 13th 10 712 12 12 What are the hypotheses for this test? Let Hd be the in the numbers of hospital admissions resulting from motor vehicle crashes for the population of all pairs of data Find the value of the test statistic t-(Round to three decimal plac es as neoded Identify the critic al value(s). Select the correct choice below and fill the answer box within your choice 08. The critical value is t-il A There is not sufficient evidence to warrant re ection of the claim of no effect Hospital admissions appear to be deed is sufficient evidence to warrant rejection of the claim of no effect. Hospital admissions appear to be affected Click to select your answer(s).Explanation / Answer
a) difference
Ho : mu_d = 0
Ha: mu_d not equal 0
b)
n = 6
Paired T for C1 - C2
N Mean StDev SE Mean
C1 6 8.50 3.33 1.36
C2 6 11.67 3.01 1.23
Difference 6 -3.17 2.71 1.11
95% CI for mean difference: (-6.02, -0.32)
T-Test of mean difference = 0 (vs 0): T-Value = -2.86 P-Value = 0.035
TS = -2.857869979
= -2.858
critical values = +- 2.570581836
b) there is sufficient evidence
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