A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of 0.20 hours. A consultant has developed a new instructional booklet intended to reduce the time an inexperienced kit builder will need to assemble the device. In a test of the effectiveness of the new booklet, 15 novices require a mean of 2.90 hous to complete the job. Assuming the population of times is normally distributed, and using the 0.05 level of significance, should we conclude that the new booklet is effective? Select one: a. The test statistics is -1.53 and is more than critical value, so new booklet is effective b. The test statistics is -1.73 and is more than critical value, so new booklet is not effective c. The test statistics is -2.14 and is less than critical value, so new booklet is not effective d. The test statistics is -1.94 and is less than critical value, so new booklet is effective
A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of 0.20 hours. A consultant has developed a new instructional booklet intended to reduce the time an inexperienced kit builder will need to assemble the device. In a test of the effectiveness of the new booklet, 15 novices require a mean of 2.90 hous to complete the job. Assuming the population of times is normally distributed, and using the 0.05 level of significance, should we conclude that the new booklet is effective? Select one: a. The test statistics is -1.53 and is more than critical value, so new booklet is effective b. The test statistics is -1.73 and is more than critical value, so new booklet is not effective c. The test statistics is -2.14 and is less than critical value, so new booklet is not effective d. The test statistics is -1.94 and is less than critical value, so new booklet is effective
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of 0.20 hours. A consultant has developed a new instructional booklet intended to reduce the time an inexperienced kit builder will need to assemble the device. In a test of the effectiveness of the new booklet, 15 novices require a mean of 2.90 hous to complete the job. Assuming the population of times is normally distributed , and using the 0.05 level of significance, should we conclude that the new booklet is effective?
Select one:
a.
The test statistics is -1.53 and is more than critical value, so new booklet is effective
b.
The test statistics is -1.73 and is more than critical value, so new booklet is not effective
c.
The test statistics is -2.14 and is less than critical value, so new booklet is not effective
d.
The test statistics is -1.94 and is less than critical value, so new booklet is effective
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