The following table compares the completion percentage and interception percentage of 5 NFL quarterbacks. Completion Percentage 55 59 60 60 62 Interception Percentage 4.5 4.2 3.5 2.9 1.4 Step 2 of 5: Calculate the estimated variance of errors, s. Round your answer to three decimal places.

Could you help me with this homework question? I got an answer of 22.9

Bill's Bookstore is tracking its monthly demand for textbooks and has seen the following demand pattern. Historical forecasts are also included. MONTH FORECASTED DEMAND ACTUAL DEMAND April 150 165 May 220 210 June 215 200 July 245 250 August 205 225 Assess Bill's performance for the forecast in the table above using the Mean Absolute Deviation (MAD). Only use the data for the months of April through August to calculate the MAD.

FIVE. Which of the following is true about standard deviation?     The first step in calculating the standard deviation is calculating the square root.   The second step in calculating the standard deviation is to subtract each measurement from the intermediate value and then square that difference.   The last step in calculating the standard deviation is to sum the squared values and divide by the number of values minus one.   Standard deviation is a type of average where the positive and negative numbers sum to zero.   The amount of difference of the measurements from the central value is called the sample standard deviation.

Shack Homebuilders Limited is evaluating a new promotional campaign that could increase home sales. Possible outcomes and probabilities of the outcomes are shown next. Possible Outcomes Ineffective campaign Normal response Extremely effective Additional Sales in Coefficient of variation Units 50 70 130 Probabilities 0.40 0.30 0.30 Compute the coefficient of variation. Note: Do not round intermediate calculations. Round your answer to 3 decimal places.

#14 Control Charts: Yellowstone National Park Yellowstone Park Medical Services provides emergency health care for park visitors. The average number of visitors treated is 21.7 per day during the summer period. The estimated standard deviation is 4.2 visitors. a. For a 10-day summer period, the following data show the number of visitors treated each day. Day 1 2 3 4 5 6 7 8 9 10 # 25 19 17 15 20 24 30 19 16 23 Make a control chart for the daily number of visitors treated and plot the data on the control chart. Does the data indicate that the number visitors treated is "in Control"? b. For another 10-day summer period, the following data saw obtained. Day 1 2 3 4 5 6 7 8 # 20 15 12 21 24 28 32 36 96 35 10 37 17 Make a control chart for the daily number of visitors treated and plot the data on the control chart. Does the data indicate that the number visitors treated is "in Control"?

The height (in inches) of a random sample of players in NCAA Division 1 basketball teams is shown to the left.    x 75 80 75 87 77 77 67 83 77 80 73 82 73 71 80 76 72 78 68 74 74 72 76 86 77 77 78   9 Sum of squared deviations:  ∑(x − x̅)² = _______. a 555.83         b 573.02         c 590.74         d 609.01

Answer letter D only. Show complete solution. Thank you!

Suppose you are shopping online for a new toy for your dog. As you look at the product reviews, you see the following distribution of ratings. Use this table for questions 2-5. Stars 5 4 3 st 2 IN 1 Frequency 9 3 2 1 5

30 A large number of students took a departmental math test 6.5% of students scored  88 or more from the scale of 100. The scores have a bell-shaped distribution with a standard deviation of  8.2 If the minimum score to pass the test is  62 what fraction of the students failed the test? a 0.0488 b 0.0542 c 0.0602 d 0.0719