A random sample of 10 observations is selected from a normal population with an unknown standard deviation. To conduct a test of hypothesis about the population mean the appropriate degrees of freedom isQuestion 3Select one:a.10b.None of the abovec.11d.9Clear my choice

A random sample of 10 observations is selected from the first normal population and 8 from the second normal population. For a one-tailed test of hypothesis at the .01 significance level to determine if there is a difference in the population means, the degree of freedom isQuestion 4Select one:a.17b.18c.None of the aboved.16

A sample of 39 observations is selected from a normal population. The sample mean is 43, and the population standard deviation is 6. Conduct the following test of hypothesis using the 0.02 significance level.

We wish to conduct a hypotheses test of the formH0: μ1 - μ2 = 0 vs H0: μ1 - μ2 > 0Both populations are assumed normal with equal variance. We draw 15 observations for the first sample and 12 observations for the second sample. State the distribution of the test statistic for the test.Question 1Select one:a.t-distribution with 26 degrees of freedomb.t-distribution with 27 degress of freedomc.t-distribution with 25 degrees of freedomd.normal distribution with 25 degrees of freedomClear my choice

Test 9.5 Which one of the following does enable to make statements about a general population using the results of a random sample from that population?Question 2Answera.Prescriptive Statisticsb.Inferential Statisticsc.Descriptive Statisticsd.Diagnostics Statistic

The mean of the all the sample means and the population mean willQuestion 6Select one:a.None of theseb.Characterized by the standard error of the mean.c.Always be equal. d.Always be normally distributed.