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2 | The sample variance is _______. | ||
a | 8285.94 | ||
b | 9469.64 | ||
c | 10521.83 | ||
d | 11690.92 |
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- The management of a certain company would like to use the following data to learn about its customer base and to evaluate the first day promotional campaign purchases. Customers who made purchases with discount coupons were labelled as “Promotional Customers”, and “Regular Customers” was used for those who did not use coupons. Customer Type of Customer Items Net Sales (GH¢) Method of Payment Gender Marital Status Age 1 Regular 1 100 Vodacash Male Married 32 2 Promotional 1 105 MTN mobile money Female Single 36 3 Regular 1 230 Airtel money Female Married 32 4 Promotional 5 300 MTN mobile money Male Married 28 5 Regular 2 150 Vodacash Female Single 34 6 Regular 20 450 Vodacash Female Married 44 7 Promotional 2 78 MTN mobile money Male Married 30 8 Promotional 3 120 MTN mobile money Female Single 22 9 Promotional 6 345…OA large city hospital conducted a study to investigate the relationship between the number of unauthorized days that employees are absent per year and the distance (miles) between home and work for the employees. A sample of 10 employees was selected and the following data were collected. D Excel file: data14-13.xlsx Distance to Work Number of Days (miles) Absent 8. 8. 9. 8 6. 10 12 14 14 4 18 If required, enter negative values as negative numbers. a. Select the correct scatter diagram for these data. A. Number of Days Absent 10+ 8+ . 6- 2+ 8. 10 12 14 16 18 20 Distance to Work (miles) 4.Martha’s Wonderful Cookie Company makes a specialsuper chocolate-chip peanut butter cookie. The companywould like the cookies to average approximately eightchocolate chips apiece. Too few or too many chips distortthe desired cookie taste. Twenty samples of five cookieseach during a week have been taken and the chocolatechips counted. The sample observations are as follows: Construct an -chart in conjunction with an R-chart using 3 limits for this data and comment on the cookie-production process. Samples Chips per Cookie1 7 69 852 7 7 8 8 103 5 57 684 4 59 97
- Scenario: The following model was fitted to data on gas mileage as a function of weight of vehicle and type of vehicle (sport utility vehicle, family sedan, subcompact). Model: MPG = 50 - 0.004WT - 8SUV - 3FS MPG =miles per gallon; WT=weight of vehicle; SUV=sport utility vehicle; FS=family sedan Answer the questions below. 1. Each pound of weight reduces fuel economy by MPG 2. Fuel economy is reduced by MPG for a sport utility vehicle 3. Fuel economy is reduced by MPG for a family sedan 4. For a subcompact car weighing 1000 pounds, what is the predicted fuel economy?A basket contains 1460 fruits. Using stratified sampling method, a sample of 150 fruits from each type, apples, bananas, grapes, plums and oranges was selected. If the basket contained 584 plums, how many plums would be apart of the sample of 150.You need to research about (Personal finance management) using a sample . Describe the steps to be taken in order to use the stratified sampling technique .
- The last digit of the heights of 67 statistics students were obtained as part of an experiment conducted for a class. Use the following frequency distribution to construct a histogram. What can be concluded from the distribution of the digits? Specifically, do the heights appear to be reported or actually measured? Digit Frequency 0 15 5 5 1 T Choose the correct histogram below. O A. O B. O C. D. 18- 56789 0123456789 ܩܫܠ 6789 123456789 Are the data reported or measured? O A. The data appears to be measured. The heights occur with roughly the same frequency. O B. The data appears to be measured. Certain heights occur a ..Note: Please help with last graph and if anything already done is incorrect!A sample of 50 UNR students was randomly selected. A question asked was about annual cost of driving a car and 50 numbers were collected. (Have you ever calculated how much costs you to drive your vehicle annually? The costs should include DMV registration, insurance, gas ( weekly cost times 52), parking, repair and maintenance, tickets/fines, and depreciation. If you have not, find it out. Often, the number is much higher than what you would think.) The sample variance a. should equal to the population variance. b. would change depending on the students included in the sample. c. should be smaller than the sample mean. d. should be smaller than the sample standard deviation. Ĉ 26. A sample of 50 UNR students was randomly selected. A question asked was about annual cost of driving a car and 50 numbers were collected. (Have you ever calculated how much costs you to drive your vehicle annually? The costs should include DMV registration, insurance, gas (weekly cost times 52), parking,…
- A random sample of data for 7 days of operation produced the following (price, quantity) data values:Price per Gallon of Paint, X Quantity Sold, Y 10 100 8 120 5 200 4 200 10 90 7 110 6 150a. Prepare a scatter plot of the data.b. Compute and interpret b1.c. Compute and interpret b0.d. How many gallons of paint would you expect to sell if the price is $7 per gallon?The Watch Corporation of Switzerland claims that its watches on average will neither gain nor lose time during a week. A sample of 18 watches provided the following gains (+) or losses (-) in seconds per week +0.42 -e.35 0.12 e.59 0.21 0. 59 -0.71 e.74 0.62 -0.89 0.69 -0.67 0.30 -0.40 -0.36 0.54 0.41 0.74 Ho H=0 Is it reasonable to conclude that the mean gain or loss in time for the watches is 0? Use the 010 significance level. a. At a level of 0.10 significance, we reject Ho: µ = 0. (Negative answer should be indicated by a minus sign. Round the final answers to 3 decimal places.) If r reject Ho b. What is the value of the test statistic? (Round the final answer to 3 decimal places.) Value of the test statistic =A company has determined that there are seven possible defects for one of its product lines. Construct a Pareto diagram for the following defect frequencies:Defect Code FrequencyA 10B 70C 15D 90E 8F 4G 3