A professor wants to know which type of instructional mode students had more satisfaction.  The professor randomly selected n = 5 students from each of the following types of classes: online only, hybrid, and face-to face only.  Student were given a satisfaction survey.  Are their differences in student satisfaction among the different instructional modes.  The data are below: Online Hybrid Face-to-Face 3 3 4 3 3 1 3 1 3 2 2 2 2 1 3   Calcuate the Sum of Squares total (SStot)

A researcher conducted a paired samples study to investigate whether local car dealers tend to charge women more than men for the same car model. Using information from the county tax collector's records, the researcher randomly selected one man and one woman from among everyone who had purchased the same model of an identically equipped car from the same dealer. The process was repeated for a total of 6 randomly selected car models. The purchase prices and the differences, d = woman- man, are shown in the table below. Selected summary statistics are also shown: Car Model 3. 4. 9. Mean Std Dev Women $20.100 S17,400 $32.500 S17.710 $29.600 $46.300 $27.268.33 S11,270.69 Men $19.580 S17,500 $32.300 S17.720 $28,300545.630 S26.838.33 SI1.028.37 Difference $520 -$4100 $200 -$10 S1,300 S670 $430.00 $519.62 Which of the following is the appropriate alternative hypothesis for a matched pairs t-test to address the researcher's question of interest? 0 Prl O

You are doing a one way analysis of variance on the fuel consumption of different makes of cars. You measure the fuel consumption of 43 cars in total. The number of car makes is 6 for this experiment. How many degrees of freedom does the sum of squares total have?

An experiment is conducted to investigate the toxic effect of three chemicals, A, B, and C on the skin of rats. Three adjacent 1-inch squares are marked on the backs of 8 rats and each of the 3 chemicals is applied to each rat. The squares of the skin are then scored from 0 to 10, depending on the degree of irritation. The data on the outcome of the experiment are given in the following table: Rat 1 2 3 4 5 7 1.0 A B C| Rank A Rank B Rank C 6 5 3 11.5 6.0 1.5 9 8 4 23.0 20.0 3.0 6 11.5 23.0 1.5 6.0 20.0 11.5 16.5 20.0 23.0 6.0 16.5 11.5 11.5 16.5 6.0 11.5 6.0 16.5 5 6 7 8 Σyi 1.0 9 3 8 6 8 9 7 6 7 5 7 50 57 43 10 5 6 6 5 10 For the original data set 1-1 ij = 150, and ₁1-13 = 1006. From the ranks of the original data set the rank sums are RA = 97.5, RB = 128, Rc = 74.5 respectively. At a = 1%, is there sufficient evidence to support the research hypothesis that the probability distributions of skin irritation scores for the 3 chemicals differ in location? (a) Stating relevant…