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.

9.4.89-P Question Help 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. Click here to view the net percentage job gain data. 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. Ho: H 1% Ha : H % (Type integers or decimals. Do not round.) i Net Percentage Job Gains X 0.2 0.4 0.7 0.6 0.8 0.9 -0.4 - 0.2 0.3 0.2 2 0.3 0 .7 0.7 -0.4 - 1.2 0.6 0.7 0.6 0.1 0.4 Print Done On-Screen Keyboard X