Question
A researcher examined gross job gains and losses as a percentage of the average of previous and current employment figures. A simple random sample of
A researcher examined gross job gains and losses as a percentage of the average of previous and current employment figures. A simple random sample of 20 quarters provided the net percentage gains?(losses are negative?gains) for jobs as shown in the accompanying table. Complete parts?(a) through?(d) below.
a. Decide?whether, on?average, the net percentage gain for jobs exceeds 0.2. Assume a population standard deviation of 0.49. Apply the?one-mean z-test with a 1?% significance level.
State the hypotheses for the?one-mean z-test.
1) We establish the null hypothesis and the alternative hypothesis:
H0?:?=0.2
Ha?:?>0.2
help with this
Compute the value of the test statistic.
z= ?
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