The following data were obtained to examine the effects of anxiety levels (low and high) and 3 anxiety interventions. This experiment has n = 5 participants in each treatment condition. B1 B2 вз M = 3 M = 6 M = 9 %3D %3D T= 15 T= 30 T= 45 A1 SS = 18 SS = 28 SS = 26 M = 1 M = 4 M = 1 T= 5 T= 20 T= 5 A2 SS = 8 SS = 20 SS = 20 %3D Source df MS Between Treatments Factor A (anxiety) Factor B (intervention) 60 AxB 30 Within Treatment 24 Total 360

The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 95​% confident that his estimate is within five percentage points of the true population​ percentage? n=?

When determining which is significant for part a -make sure to include df, p value (greater than or less than .05), and t statistic

Las Vegas has seen increased competition from Singapore and Macau for customers in the casino resort industry. One measurement of success is the average length of stay by visitors. The data in this file show the number of days a random sample of visitors stayed at each location. a. Using α = 0.05 to determine if there is a difference in the average length of stay by visitors for the three locations. Follow the steps as outlined in the exercises. b. If warranted, perform a multiple comparison test to determine which pairs are different using α = 0.05. c. Verify your results using Excel.

Sean also took the SAT (μ=1010,σ=200) and had a z score of +0.25. What was his SAT raw score? What was his percentile?

A student scored between 81% and 93% on all exams except for one that she failed with a47% because she studied the wrong chapters. Which value would better represent hertypical performance: mean exam grade or median exam grade? Briefly explain.

find the value represented by z-score of 2.043, given u=63 and o=4.25

The level of cretaine phosphokinase (CPK) in blood samples measures the amount of muscle damage for athletes. At Jock State University, the level of CPK was determined for each of 25 football players and 15 soccer players before and after practice. The two groups of athletes are trained independently. The data summary is as follows :   For football players: n=25 Before Practice After Practice Difference (Before-After) Mean 254.73 225.6 29.13 Standard deviation 115.5 132.6 21.00   For soccer players: n=15 Before Practice After Practice Difference (Before-After) Mean 177.1 173.8 3.3 Standard deviation 60.7 64.4 6.88   Assume that all the data above are normal, use the information above to answer problem   (7) Construct a 95% Confidence Interval for the difference in mean CPK values for football players BEFORE and AFTER exercises.

Marshall took the SAT ( μ=1010,σ=200) and had a raw score of 950. What was his z-score? What was his percentile? Interpret his z score. Interpret his percentile

Find the test statistic for a proportion "p" given the following information. Malloree ordered 15 pair of shoes online during the stay-at-home order, and 2 pairs arrived with mismatched sizes.  Looking on line, she found that the retailer claimed that this happened 4% of the time with online orders.