MATH302 - Week 2 Test

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American Military University *

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302

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Feb 20, 2024

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Attempt Score 19 / 20 - 95 % Overall Grade (Highest Attempt) 19 / 20 - 95 % Question 1 1 / 1 point The lengths (in kilometers) of rivers on the South Island of New Zealand that flow to the Tasman Sea are listed below. Find the variance. See Attached Excel for Data. Use the Excel function to find the Variance. river length data.xlsx Hide ques ! on 1 feedback Question 2 1 / 1 point 1057.58 7.10 1107.94 33.29 32.52 use =VAR.S function in Excel. use =VAR.S function in Excel. 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.

1814.5 Hide ques ! on 2 feedback Question 3 1 / 1 point A sample of 8 cats found the following weights in kg. What is the variance? See Attached Excel for Data. Use the Excel function to find the Variance. cat weight data.xlsx Hide ques ! on 3 feedback Question 4 1 / 1 point Given the following boxplot where m is the median value, what statement could be made about the distribution of the data? FTES data.xlsx Calculate the median. Round to one decimal place. Use the Excel function to find the Median. Median: use =MEDIAN function in Excel 0.104 0.9 0.087 0.076 0.295 use =VAR.S function in Excel

Question 5 1 / 1 point Boxplots are most useful for: Question 6 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: No statement can be made about the data because no data values are shown on the plot. The distribution is positively skewed. The distribution is approximately symmetric. The distribution is negatively skewed. calculating the mean of the data calculating the median of the data comparing the mean to the median comparing two populations graphically Cannot be determined 20.7% 59% 40.5%

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Hide ques ! on 6 feedback Question 7 1 / 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? Question 8 1 / 1 point 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 Hide ques ! on 8 feedback Question 9 1 / 1 point The following histogram shows the number of enrollment in 40 community colleges. The shape of this distribution is: 23 + 17 + 5 = 45 45/111 50% 99.7% 95% 68% 65.18 km 66.34 km 64 km 67.68 km 56 km use =MEDIAN function in Excel use =MEDIAN function in Excel

Question 10 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 Identify the Mode. Hide ques ! on 10 feedback Question 11 1 / 1 point A sample of 8 cats found the following weights in kg. What is the mode weight? See Attached Excel for Data. right skewed (skewed positive) symmetric left skewed (skewed negative 25 27 25 and 27 25, 26 27 and 33 40 The mode is the length that appears the most frequently. There are two modes, 25 and 27, each appearing three times.

cat weight data.xlsx Hide ques ! on 11 feedback Question 12 1 / 1 point 37.8 Hide ques ! on 12 feedback Question 13 1 / 1 point 3.7 kg 4.1 kg 0 kg No mode 3.2 kg The value that appears most often is the mode, 3.7 The value that appears most often is the mode, 3.7 Listed are 29 ages for Academy Award-winning best actors in order from smallest to largest. See Attached Excel for Data. age data.xlsx Find the 40th percentile. Round one decimal place. years Hint: Use =PERCENTILE.INC function in Excel. use =PERCENTILE.INC( , .40) in Excel. 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.

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282 Hide ques ! on 13 feedback Question 14 1 / 1 point 225.5 Hide ques ! on 14 feedback Question 15 1 / 1 point The following graph represents a random sample of car models driven by college students. What was the most common car model? 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 Use Excel Functions =PERCENTILE.INC( ,.75) 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= Hint: Use =PERCENTILE.INC function in Excel. Retrieved from http://www.statsci.org/data/general/cholest.html. Use =PERCENTILE.INC( , .25) in Excel.

Question 16 1 / 1 point The following table summarizes the proportion of people who prefer different food for lunch. Lunch Choices Proportion Mac 'n Cheese 0.24 Sandwich 0.36 Soup 0.28 Hamburger 0.08 Chicken Nuggets 0.04 Select the correct bar graph for the distribution of people by their lunch choice. Chevy Both Chevy and Toyota Both Nissan and Toyota Both Honda and Nissan Toyota Other Nissan

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Question 17 1 / 1 point The Australian Institute of Criminology gathered data on the number of deaths (per 100,000 people) due to firearms during the period 1983 to 1997. The time-series plot is below. What year had the highest rate of deaths? Retrieved from http://www.statsci.org/data/oz/firearms.html . 1997

Hide ques ! on 17 feedback Question 18 1 / 1 point A time series plot is essentially a: 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. Hide ques ! on 19 feedback 1989 1983 1985 1985 along the x-axis has the highest peak along the y-axis. figure diagram Scatterplot histogram 50% of students have height less than 65 inches The maximum height observed is 67 inches More students have height of 65 inches or more The maximum observed height is 71 inches None of these are correct

Question 20 0 / 1 point 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) 167 201 170 185 182 186 172 173 185 178 177 184 169 171 185 178 175 178 162 165 188 175 154 176 More students have height of 65 inches or more The maximum observed height is 71 inches. Only 4 heights are less than 65 inches. Stem Leaf 6 1244567777778999 7 0111 More students have height of 65 inches or more The maximum observed height is 71 inches. Only 4 heights are less than 65 inches. Stem Leaf 6 1244567777778999 7 0111 More students have height of 65 inches or more The maximum observed height is 71 inches. Only 4 heights are less than 65 inches. Stem Leaf 6 1244567777778999 7 0111 16 17 18 19 15 16 17 18 20

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Hide ques ! on 20 feedback Done 15 16 17 18 19 15 16 17 18 19 20 You will still have a place holder for 19 but leave the leaves blank.

MATH302 - Week 2 Test

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