A sample has individuals with scores of 1, 3, 5, 6, and 6. What is the estimated population variance?

An organizational psychologist conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a job-skills training program. The cutoff t needed is -1.833. The standard deviation of the distribution of means of change scores is 2.0, and the mean change score for the sample studied is an increase of 5.2. What is the appropriate conclusion?

A school counselor wants to test a technique to reduce procrastination in students. Students time their procrastination for a week, which is used as a pretest indicator of procrastination. Students then attend a workshop in which they are instructed to use a specific warm-up exercise for studying by focusing on a pleasant activity. For the next week, students again time their procrastination. The counselor then uses the time from this week as the posttest (after) measure. Assume the counselor wants to examine whether there is a change (either an increase or decrease) in procrastination after attending his workshop. If the counselor tests 10 students using the .05 level of significance, what would be the cutoff t score(s)? (A t table should not be necessary.)

Ratio and Proportion 26)  500 people for 3000 tickets.  How many tickets will one person receive?

If three samples have means of 10, 20, and 15, respectively, what is their grand mean?

Ratio and Proportion 30)  57 books to 95 students, how many books to 5 students?

An organizational psychologist conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a job-skills training program. The cutoff t needed is -1.833. The standard deviation of the distribution of means of change scores is 2.0, and the mean change score for the sample studied is an increase of 5.2. What is the t score?

Fractions reduce to lowest terms 31)

Divide 16)

Solve 36)  7000mg = How many grams?