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Statistics

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Apr 3, 2024

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he following data are the distances between 21 retail stores and a large distribution center. The distances are in miles. See Attached Excel for Data. retail store data.xlsx Find the standard deviation and round to the nearest tenth. Use the Excel function to find the Sample SD. 36.3 79.5 34.5 96 35.5 Hide question 1 feedback use =STEDV.S function in Excel. n 2 1 The population FTES for 2005–2006 through 2010–2011 was given in an updated report. The data are reported here. See Attached Excel for Data. FTES data.xlsx Use the Excel function to find the First Quartile First Quartile: ___1702.5 ___ Calculate the first quartile. Round to one decimal place. uestion 2 feedback UARTILE.INC( , 1) function in Excel. on 3 1 / The population FTES for 2005–2006 through 2010–2011 was given in an updated report. The data are reported here. See Attached Excel for Data.

FTES data.xlsx Calculate the Sample Variance. Round to two decimal places. Use the Excel function to find the Sample Variance. Variance: ___27901.07 ___ uestion 3 feedback AR.S( ) function in Excel. on 4 1 / A survey was conducted of 130 purchasers of new BMW 3 series cars, 130 purchasers of new BMW 5 series cars, and 130 purchasers of new BMW 7 series cars. In it, people were asked the age they were when they purchased their car. The following box plots display the results. Which group is most likely to have an outlier? BMW 5 Series None of these groups BMW 7 Series BMW 3 Series

Question 5 1 / 1 point To determine if Reiki is an effective method for treating pain, a pilot study was carried out where a certified second-degree Reiki therapist provided treatment on volunteers. Pain was measured using a visual analogue scale (VAS) immediately before and after the Reiki treatment (Olson & Hanson, 1997). Higher numbers mean the patients had more pain. Use the box-and-whiskers plots to determine the IQR for the before treatment measurements. Enter your response in the space below. Do Not Round. IQR= ___4 ___ uestion 5 feedback Q3 - Q1 and Q1 = 2 on 6 1 / A histogram that is positively skewed is also called skewed to the right

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balanced skewed to the left symmetric Question 7 0 / 1 point Suppose one hundred eleven people who shopped in a special t-shirt store were asked the number of t-shirts they own costing more than $19 each. The percentage of all people who own at most three t-shirts costing more than $19 each is approximately: 59% 40.5% 20.7% Cannot be determined Hide question 7 feedback 23 + 17 + 5 = 45 45/111 n 8 1 A sample of 8 cats found the following weights in kg. What is the mode weight? See Attached Excel for Data. cat weight data.xlsx

0 kg 4.1 kg No mode 3.2 kg 3.7 kg Hide question 8 feedback The value that appears most often is the mode, 3.7 The value that appears most often is the mode, 3.7 n 9 1 A sample of 8 cats found the following weights in kg. What is the median weight? See Attached Excel for Data. cat weight data.xlsx 3.7 kg 3.9 kg 3.7125 kg 3.6875 kg Hide question 9 feedback use =MEDIAN function in Excel use =MEDIAN function in Excel n 10 1 The median can also be described as: the middle observation when the data values are arranged in ascending order the second quartile the 50th percentile all of the above Question 11 1 / 1 point The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest.

See Attached Excel for Data. boat length data.xlsx Calculate the mean. Round your answer to one decimal place. ___27.3 ___ uestion 11 feedback RAGE function in Excel on 12 1 / Cholesterol levels were collected from patients two days after they had a heart attack (Ryan, Joiner & Ryan, Jr, 1985). Use Excel to find the 25th percentile. Round your answer to one decimal place. See Attached Excel for Data. cholesterol data.xlsx Answer= ___225.5 ___ Hint: Use =PERCENTILE.INC function in Excel. Retrieved from http://www.statsci.org/data/general/cholest.html . uestion 12 feedback ERCENTILE.INC( , .25) in Excel. on 13 1 / Cholesterol levels were collected from patients two days after they had a heart attack (Ryan, Joiner & Ryan, Jr , 1985). Use Excel to find the 52nd percentile. Round to two decimal places. See Attached Excel for Data. cholesterol data.xlsx

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Use the Excel function =PERCENTILE.INC to find the Percentile. Retrieved from http://www.statsci.org/data/general/cholest.html . Fill in each of the values below: 52nd percentile ___270.08 ___ uestion 13 feedback cel Functions CENTILE.INC( ,.52) on 14 1 / The following data show the average time (in hours) that a random sample of 8 students sleep per night. See Attached Excel for Data. sleep hours data.xlsx Use the Excel function =PERCENTILE.INC to find the Percentile. The 81st percentile of time students sleep per night is ___8.1 ___ hours. Round to 1 decimal place. uestion 14 feedback ERCENTILE.INC( , .81) in Excel. on 15 1 / The following graph represents a random sample of car models driven by college students. What was the most common car model?

Toyota Both Nissan and Toyota Both Chevy and Toyota Both Honda and Nissan Nissan Chevy Other Question 16 0 / 1 point The total frequency of the data whose ogive is shown below is approximately 12 18 90 34 Hide question 16 feedback The frequency count is along the y-axis. n 17 1 A scatter plot would be useful for

Showing the relationship between the sales of blank CDs and blank DVDs Showing the relative number of sales of four different brands of blank DVDs Showing the trend of sales, over time, of five different brands of blank DVDs Showing the top selling brands of blank DVDs Question 18 0 / 1 point A time series plot is essentially a: diagram histogram figure Scatterplot Question 19 1 / 1 point The following data show the height (in inches) of sample of students. 67 70 71 61 71 67 69 68 66 65 67 67 64 71 69 67 67 64 62 69 Create a stem leaf plot for these data and then select all of the correct statements about these data based on your plot. The maximum observed height is 70 inches. 20% of students are over 69 inches tall. 50% of students heights are less than 65 inches. There are 25 students in the sample. Hide question 19 feedback 70, 71, 71 and 71 are over 69 inches tall. 4/20= 20% of students are over 69 inches tall. Stem Leaf 6 1244567777778999 7 0111 n 20 0 A sample of heights of 20 people in cm is recorded below. Which is the correct stems for a stem-and-leaf plot? Height (cm)

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16 7 20 1 17 0 18 5 18 2 18 6 17 2 17 3 18 5 17 8 17 7 18 4 16 9 17 1 18 5 17 8 17 5 17 8 16 2 16 5 18 8 17 5 15 4 17 6 16 17 18 19 15 16 17 18 19 20 15 16 17 18 20 15 16

17 18 19 Hide question 20 feedback You will still have a place holder for 19 but leave the leaves blank.

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