In the following situation we want to compare the mean responses in several populations.Are you a morning person, an evening person, or neither? Does this personality trait affect how well you perform? A sample of 111 students took a psychological test that found 17 morning people, 35 evening people, and 59 who were neither. All the students then took a test of their ability to memorize at 8 a.m. and again at 9 p.m. You analyze the score at 8 a.m. minus the score at 9 p.m. Give k, the ni, and N?

Which one would be the answer?

he Computer Anxiety Rating Scale (CARS) measures an individual’s level of computer anxiety, on a scale from 20 (no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business students. One of the objectives of the study was to determine whether there are differences in the amount of computer anxiety experienced by students with different majors. They found the following: Major                  n           Mean   Marketing          19          44.37 Management     11          43.18 Other                 14          42.21 Finance             45          41.80 Accountancy     36          37.56 MIS                   47          32.21   (A) Complte the following ANOVA table: Source of Variation SS df MS F-ratio F-crit Between groups 3172 5  634.4  4.9567 2.2685 Within groups 21246 166  127.988     Total 24418 171       (A)  At the 0.05 level of significance, is there evidence of a difference in the mean computer anxiety…

In a study examining the relation of math ability to the belief that math ability was innate, the belief was considered the predictor variable. The researcher hopes to find a correlation between the participants’ math ability and their belief that math ability is innate.  The scores for the three participants are shown below.   The group that believed that math is NOT innate scored 66, 70, 50.   The group that believed that math IS innate scored 7, 4,10.                               what are the mean and SD for each group?

In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean score on test Number of ninth graders Glenwood 78 258 Central City 92 335 Lincoln High 66 186 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 78.7 . Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place.

Suppose you are interested in testing whether the mean earning of men in California differs significantly from the mean earning of men in New York. If the number of men from California in the sample is 123 and the number of men from New York in the sample is 88, how many degrees of freedom are there?

In a study researching how donating to charity can affect a person's happiness, 96 participants were given $5 a day for one week. Each participant was randomly assigned to one of two groups. Those assigned to the first group were asked to spend the money on themselves, and those assigned to the second group were asked to donate the money to charity. At the end of the week, all of the participants were asked to rate their overall level of happiness on a scale from 0 to 100, with higher scores indicating greater levels of happiness. Which of the following are the appropriate null and alternative hypotheses to test whether the sample data provide convincing statistical evidence that donating to charity results in greater happiness than spending on oneself, on average? Ho self- "charity = 0 (A) Ha self charity >0 Ho self Mcharity=0 (B) Ha self charity 0 (E) Ha self = Mcharity <0

If your height is at 58th percentile in your age group, which of the following statement is TRUE ? Group of answer choices There are 58% people whose heights are the same. There are other 42% people whose height are at or below your height. Your height is 5 feet and 8 inches. There are other 58% people with height at or above your height. There are other 42% people with height at or above your height.

You are testing the claim that the proportion of men who own cats is larger than the proportion of women who own cats.You sample 160 men, and 15% own cats.You sample 60 women, and 20% own cats.Find the test statistic

You are testing the claim that the proportion of men who own cats is larger than the proportion of women who own cats.You sample 180 men, and 75% own cats.You sample 100 women, and 60% own cats.Find the test statistic.