Courtroom stenographers must type up all that is said in the proceeding of a court case. Journalists make a living typing articles for publication. In a random sample of 17 stenographers and 22 journalists, the average words per minute these two groups could type were \overline{x}_1 = 72 for the stenographers and \overline{x}_2 = 55 for the journalists. The standard deviations in these two samples were s_1 = 12s and s_2 = 25 In testing the hypotheses H_0 : \mu_1 = \mu_2H0:μ1=μ2 and H_a : \mu_1 \ne \mu_2Ha:μ1=μ2, the data is found to be: a. not significant at level 0.05 b. significant at level 0.05, but not significant at level 0.01. c. significant at level 0.01, but not significant at level 0.001. d. significant at level 0.001.
Courtroom stenographers must type up all that is said in the proceeding of a court case. Journalists make a living typing articles for publication. In a random sample of 17 stenographers and 22 journalists, the average words per minute these two groups could type were \overline{x}_1 = 72 for the stenographers and \overline{x}_2 = 55 for the journalists. The standard deviations in these two samples were s_1 = 12s and s_2 = 25
In testing the hypotheses H_0 : \mu_1 = \mu_2H0:μ1=μ2 and H_a : \mu_1 \ne \mu_2Ha:μ1=μ2, the data is found to be:
a. not significant at level 0.05
b. significant at level 0.05, but not significant at level 0.01.
c. significant at level 0.01, but not significant at level 0.001.
d. significant at level 0.001.
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