Write one sentence explaining why your research question can’t be answered with certainty just by considering if one of the sample means is higher or lower than the other.

The alternative hypothesis is often what the test is attempting to establish.Question 9Select one:TrueFalse

If many samples are taken from the same population, their means will be different.Question 7Select one:TrueFalse

Use of a sample of 5000 is not necessarily better than one of 500.” How would youreact to this statement?

A student believes that the average grade on the final examination in DSILYTC is greater than 85.  She plans on taking a sample to test her belief.  The correct null hypothesis is ___.Group of answer choicesPopulation mean  is less than or equal to 85Population mean  is less than 85Population mean  is greater than or equal to 85Population mean  is greater than 85

Question 41Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhich of the following is characteristic of descriptive statistics?Question 41Answera.A clustering of data points in groupsb.A rejection of a hypothesisc.A simple summary about the observations that have been maded.A confidence interval to determine true parameter valuesClear my choiceQuestion 42Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhich is true about complementary events?Question 42Answera.There are generally many complements to one eventb.They are mutually exclusivec.If one occurs, the other also occursd.They are in exhaustiveClear my choiceQuestion 43Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhich of the following is characteristic of a random variable?Question 43Answera.Has a value immune to chanceb.Has a single, fixed valuec.Has a set of possible different valuesd.Has only objective random processClear my choiceQuestion 44Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhat are the two characteristics of a statistical relationship that are shown by scatter plots?Question 44Answera.direction and strengthb.strength and verticalityc.horizontality and verticalityd.strength and horizontalityClear my choiceQuestion 45Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhich of the following is important to understand about population proportions?Question 45Answera.It is important to rely on the proportions expected within a sample of the populationb.It is important for the sample to be small for greater confidencec.It is important for the sample to be random for it to be reliabled.It is important to recognize that sample proportion is exactly the same as the population proportion