Quiz 2 Attempt 2

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School

American Military University *

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302

Subject

Geography

Date

Dec 6, 2023

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docx

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Uploaded by DeanHippopotamus5891

Question 1 0 / 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 32.52 1057.58 7.10 33.29 1107.94 Hide question 1 feedback use =VAR.S function in Excel. use =VAR.S function in Excel. Question 2 1 / 1 point 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) Hide question 2 feedback use =STEDV.S function in Excel. Question 3 1 / 1 point 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 ___ Hide question 3 feedback use =VAR.S( ) function in Excel. 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?

The distribution is positively skewed. The distribution is approximately symmetric. No statement can be made about the data because no data values are shown on the plot. The distribution is negatively skewed. Question 5 1 / 1 point 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

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35-44 15.0 45-54 13.1 55-64 11.9 65+ 10.3 Which box plot most resembles the information above? A

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: Cannot be determined

20.7% 40.5% 59% Hide question 6 feedback 23 + 17 + 5 = 45 45/111 Question 7 1 / 1 point The following data represents the grades in a statistics course. Below is the frequency distribution and histogram.

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Class Limit Class Midpoint Frequency Relative Frequency

40 – 49.9 45 2 0.08 50 – 59.9 55 1 0.04 60 – 69.9 65 7 0.28 70 – 79.9 75 6 0.24 80 – 89.9 85 7 0.28 90 – 99.9 95 2 0.04 How many students were in the class? 95 25 75 100 7 Hide question 7 feedback 2+1+7+6+7+2 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 mode. See Attached Excel for Data. river length data.xlsx 56

no mode 32 56 & 64 64 Hide question 8 feedback The two values that appear most often are 56 and 64. Question 9 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. 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. Question 10 1 / 1 point A sample of 8 cats found the following weights in kg. What is the mean weight? Do not round your answer. See Attached Excel for the Data.

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cat weight data.xlsx 3.9 kg 3.7125 kg 3.6875 kg 3.7 kg Hide question 10 feedback use =AVERAGE function in Excel Question 11 1 / 1 point 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 3.6875 kg 3.7 kg 3.9 kg 3.7125 kg Hide question 11 feedback use =MEDIAN function in Excel use =MEDIAN function in Excel Question 12 1 / 1 point 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. ___ 37.8 ___ years Hint: Use =PERCENTILE.INC function in Excel. Hide question 12 feedback use =PERCENTILE.INC( , .40) in Excel. Question 13 1 / 1 point Jesse was ranked 36th in his graduating class of 180 students. At what percentile is Jesse's ranking? 20th percentile 57th percentile 80th percentile 63rd percentile Hide question 13 feedback 36/180 = .20 This means he is in the top 20, which is the 80th percentile of the glass. Question 14 1 / 1 point 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 _ __ Hide question 14 feedback Use Excel Functions =PERCENTILE.INC( ,.75) Question 15 1 / 1 point

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The total frequency of the data whose ogive is shown below is approximately 18 90 34 12 Hide question 15 feedback The frequency count is along the y-axis. Question 16 1 / 1 point The following data represents the percent change in tuition levels at public, four-year colleges (inflation adjusted) from 2008 to 2013 (Weissmann, 2013). Below is the frequency distribution and ogive.

Class Limits Cumulative Frequency 2.2 – 11.7 6 11.8 – 21.3 26 21.4 – 30.9 37 31.0 – 40.5 41 40.6 – 50.1 43 50.2 – 59.7 45 59.8 – 69.3 48 69.4 – 78.9 50 Based on the information, what is the cumulative relative frequency for the 50.2% – 59.7% change in tuition class? 90

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45 55 2 Hide question 16 feedback 45/50 = 90%. Asks for relative frequency not frequency. Question 17 1 / 1 point A time series plot is essentially a: diagram histogram figure Scatterplot Question 18 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 . 1985 1997 1989 1983 Hide question 18 feedback 1985 along the x-axis has the highest peak along the y-axis. Question 19 1 / 1 point

The following data show the amount (in ounces) of beverage in randomly selected 16- ounce beverage cans. Create a Stem-Leaf plot for these data. 15.8 16.1 15.2 14.8 15.8 15.9 16.0 15.5 16.1 15.7 Fill in the blanks of table below to complete the Stem-Leaf plot for these data. The key is 15|2 = 15.2. Sort the values for Leaf in increasing order and do not keep spaces or commas between leaves. Ste m Leaf 14 15 16 (a) (b) (c) (a): ___ 8 ___ ( 33.3 %) (b): ___ 257889 ___ (33.3 %) (c): ___ 011 _ __ (33.4 %) Question 20 1 / 1 point The graph below is for pulse rates before and after exercise. Before Pulse Rates After

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9 8 8 7 6 5 2 6 9 8 8 8 6 5 5 5 1 1 0 0 7 8 8 7 5 4 2 8 5 6 6 7 8 9 4 0 9 0 1 1 2 3 4 5 5 6 8 4 10 0 1 4 6 7 11 6 7 12 4 5 8 What was the slowest pulse rate of the after exercise group? ___ 85 _ __ Hide question 20 feedback The Leaves on the right are for Before Exercise and the Leaves on the left are for After Exercise.

Quiz 2 Attempt 2

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