d There t5 h8 dlnerence Ih the avèragé useful lite of the disks for two types of
ID: 3338198 • Letter: D
Question
d There t5 h8 dlnerence Ih the avèragé useful lite of the disks for two types of solutions. Both are equally effective. There is a difference in the average useful life of the disks for two types of solutions-the disks using the First Solution lasted longer There is a difference in the average useful life of the disks for two types of solutions-the disks using the Second Solution lasted longer There is not enough data to make a conclusion. None of the above b. c. d. e. Two boats, the Prada (taly) and the Oracle (U.S.A.), are competing for a spot in the upcoming America's Cup race. They race over a part of the course several times. Below are the sample times in minutes. Assume the population standard deviations are the same. At the .10 significance level, can we conclude that there is a difference in their mean times? Assume the population variances are equal. Time (minutes) Boat Prada (taly) 12.9 12.5 11.0 13.3 112 114 116 12.3 142 113 Oade (USA) 14.1 14.1 14.2 17.4 15.8 16.7 161 133 134 136 108 190 33. The variables of interest (x) in this problem are the two boats-Prada and Oracle. True b. False 34. The problem involves: b. c. d. e. Comparing the variances of two populations Comparing means of two independent populations Comparing the means of two dependent samples None of the above 35. What is the correct hypothesis setup for this problem? b. e. f None of the above 36. What is the sample mean for Prada (round to four decimals)? 37. What is the sample mean for Oracle (round to four decimals)? Note: for questions #38 and #39, enter the data into the template in the order Prada then Ora (round to 4 decimals). Nots The computed test statistic for the sample above is test statistic in the order of how the groups appear on the hypotheses. 38. 9 At the 0.10 significance level, what is the critical value for testing the null hypothesis? What is the p-value for the test?(round to 4 decimals) ficance level, what is the correct statistical conclusion?Explanation / Answer
SOL:
T test for independent means
33
(a) true
34
(c)
comparing means of two populations.
35
(c)
Ho means (prada)=means(oracle)
H1:means(prada) not =means(oracle)
OPTIONC
(d)
12.17
(e)
14.875
38:
t=-3.5409
39.
tcrit=1.7247
40;
p=0.0021
41
p<alpha
p<0.1
Reject Null hypothesis
t-Test: Two-Sample Assuming Equal Variances PRADA(ITALY) ORACLE(USA) Mean 12.17 14.875 Variance 1.115667 4.874773 Observations 10 12 Pooled Variance 3.183175 Hypothesized Mean Difference 0 df 20 t Stat -3.54092 P(T<=t) one-tail 0.001026 t Critical one-tail 1.325341 P(T<=t) two-tail 0.002051 t Critical two-tail 1.724718Related Questions
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