he personnel director of a large corporation determines the keyboarding speed, o
ID: 3376185 • Letter: H
Question
he personnel director of a large corporation determines the keyboarding speed, on certain standard materials, of a random sample of secretaries from her company. She wants to know whether the keyboarding speed of secretaries at her company is different from the national mean of 50, with a standard deviation of 5. She conducts her study and finds a mean of 48 for 20 secretaries. Use the .05 level of significance to answer her question.
4. Using the confidence interval, what decision should be made about the null hypothesis? Conference) interval is (45.68, 50.31)
Fail to reject the alternative hypothesis
Reject the null hypothesis
Fail to reject the null hypothesis b/c p < alpha
none of the above
What final conclusion can be made within the context of this example?
There is insufficient evidence to indicate that keyboarding speed does not equal 50.
Beccause we failed to reject, there is insufficient evidence to indicate that keyboarding speed does not equal 50.
There is insufficient evidence to indicate that keyboarding speed equals 50.
There is sufficient evidence to indicate that keyboarding speed is less than 48.
a.Fail to reject the alternative hypothesis
b.Reject the null hypothesis
c.Fail to reject the null hypothesis b/c p < alpha
.none of the above
What final conclusion can be made within the context of this example?
a.There is insufficient evidence to indicate that keyboarding speed does not equal 50.
b.Beccause we failed to reject, there is insufficient evidence to indicate that keyboarding speed does not equal 50.
c.There is insufficient evidence to indicate that keyboarding speed equals 50.
d.There is sufficient evidence to indicate that keyboarding speed is less than 48.
Explanation / Answer
.
C) fail to reject the null hypothesis b/c p < alpha
Because we failed to reject, there is insufficient evidence to indicate that keyboarding speed does not equal 50.
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