Math302 week 2 quiz

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American Military University *

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302

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Statistics

Date

Feb 20, 2024

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docx

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Uploaded by BigOx88

n 1 1 An instructor wants to compare spread (variation) of final grades of students in her online class and face-to-face class. The instructor selects 10 students randomly from each class and the following table shows the final grades of those students. See Attached Excel for Data. final grade data.xlsx Use the Excel function to find the Sample SD. The standard deviation of final grades for the online class is ___7.83 ___ Use the information to respond to the following question: (round to 2 decimal places) uestion 1 feedback TEDV.S function in Excel. on 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 Calculate the Sample Variance. Round to two decimal places. Use the Excel function to find the Sample Variance. Variance: ___27901.07 ___ uestion 2 feedback AR.S( ) 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 median. Round to one decimal place. Use the Excel function to find the Median. Median: ___1814.5 ___ uestion 3 feedback MEDIAN function in Excel on 4 1 / Santa Clara County, CA, has approximately 27,873 Japanese- Americans. Their ages are as follows : Age Group Percent of Community 0-17 18.9 18-24 8.0 25-34 22.8 35-44 15.0 45-54 13.1 55-64 11.9 65+ 10.3 Which box plot most resembles the information above?

Questi on 5 1 / 1 point Boxplots are most useful for: calculating the mean of the data comparing two populations graphically calculating the median of the data comparing the mean to the median Question 6 0 / 1 point Suppose that a histogram of a data set is approximately symmetric and bell shaped. Approximately what percent of the observations are within one standard deviation of the mean? 95% 99.7% 50% 68%

Question 7 1 / 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% Cannot be determined 20.7% 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 3.2 kg No mode

4.1 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 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 Identify the Mode. 25 27 25 and 27 25, 26 27 and 33 40 Hide question 9 feedback The mode is the length that appears the most frequently. There are two modes, 25 and 27, each appearing three times. n 10 1 The lengths (in kilometers) of rivers on the South Island of New Zealand that flow to the Tasman Sea are listed below. Find the mode. See Attached Excel for Data. river length data.xlsx 64 56 32 56 & 64 no mode

Hide question 10 feedback The two values that appear most often are 56 and 64. n 11 1 The lengths (in kilometers) of rivers on the South Island of New Zealand that flow to the Tasman Sea are listed below. Find the median. See Attached Excel for Data. river length data.xlsx 67.68 km 56 km 64 km 66.34 km 65.18 km Hide question 11 feedback use =MEDIAN function in Excel use =MEDIAN function in Excel n 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 Q3. Do not include any decimals. See Attached Excel for Data. cholesterol data.xlsx Use the Excel function =PERCENTILE.INC to find Q3. Retrieved from http://www.statsci.org/data/general/cholest.html . Fill in each the value below: Q3 ___282 ___ uestion 12 feedback

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