C rctery stores run big sales on selected items, but regular pricing is higher. Some have better every-day pricing but then run fewer sales Amid COVID-19 pandemic, a consumer agency decided to test if the mean grocery prices are significantly different among the three popular grocery chains in Edmonton and Calgary The weekly total for four consecutive weeks (rounded to the nearest dollar) based on the prices of 100 every-day use items for each of the stores is provided in the following table Safeway Real.Canadian. Superstore Save On Foods 798 752 767 781 729 795 763 697 742 817 744 796 1. Assuming that all the assumptions required to apply for the one-way ANOVA procedure hold true, answer the following questions a. Which of the following is the correct pair of the null and alternative hypotheses? Choose the number 1, 2, or 3 that shows the correct pair 1. Ho:P1- 2 - 3-P4 Hl : Not all means are equal 2 Ho:P-P2 3. Ho - 2 P3 H: Not all means are equal b. Which of the following distrabutions would you use to test the hypothesis in part (a)? Choose the number 1, 2, 3, or 4 that shows the correct distribution 1t distribution 2 F distribution

Each year, marketing and information firm J.D. Power and Associates surveys new car owners 90 days after they have purchased their cars. The data collected are used to rate auto brands (Toyota, Ford, and others) on initial quality and initial customer satisfaction. USA Today reported both the number of manufacturing defects per 100 vehicles and a satisfaction score for all 33 brands sold in the United States.+ A research group decides to compare the mean number of defects for 2 specific models of cars, A and B, made this year by taking random samples of 100 cars of each model. USE SALT (a) After collecting the data, the research group calculates a 95% confidence interval to estimate the difference in population means. In this case, what is the population? O the defects O all cars made this year all cars for models A and B that were produced this year O the 100 cars from each model (b) Suppose the calculated confidence interval is (100, 104) number of defects. What is the value of the…

Indicate the dependent and independent variables, the number of levels for each independent variable, and whether each variable is within-subjects or between subjects 1.   Individuals with anorexia and individuals with bulimia take a cognitive distortions test upon entering a treatment program for eating disorders and again three weeks later.

A preschool teacher is interested in whether the type of math program used impacts learning. One class receives a workbook to complete at home and another class receives an interactive app. The preschool teacher then compares whether those who received the interactive app versus the workbook perform better on a math test (percentage correct).   Identify the independent variable and the operational definition Identify the dependent variable and the operational definition. Below you will find data for this experiment. Draw a histogram for each of the math programs. Determine if the data for each condition presents any skewness or kurtosis properties. Compute the following for each condition below: ∑X ∑(X)2 ∑X2 ∑(X-1) ∑(X-1)2   Workbook X f 80 2 79 2 75 3 81 1 60 5 65 6 75 8   App X f 90 5 80 3 82 4 94 3 78 2 93 4 92 6

In a data set with 25 scores, if the value 16 occurs 12 times, what is its relative frequency?

An observational study of teams fishing for the red spiny lobster in a certain body of water was conducted and the results published in a science magazine. One of the variables of interest was the average distance separating traps - called "trap spacing" - deployed by the same team of fishermen. Trap spacing measurements (in meters) for a sample of seven teams of fishermen are shown in the accompanying table. Of interest is the mean trap spacing for the population of red spiny lobster fishermen fishing in this body of water. Complete parts a through f below. E Click the icon to view the trap spacing data. Trap Spacing Data a. Identify the target parameter for this study. The target parameter for this study is 93 101 107 95 81 68 84 b. Compute a point estimate of the target parameter. (Round to two decimal places as needed.) Print Done c. What is the problem with using the normal (z) statistic to finda confidence interval for the target parameter? O A. The point estimate is too large to…

A researcher is studying psychological factors in artistic achievement among teenage girls. One variable he is particularly interested in is perseverance. What information does a measure of variability for the variable perseverance convey? Check all that apply. What is the central tendency for the variable perseverance among teenage girls? What is the most common value for the variable perseverance among teenage girls? How spread out are the values for perseverance amoung teenage girls? Do all teenage girls have the same amount of perseverance?