MATH302 - Week 2 Test1

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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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Week 2 Test - Results Attempt Score 18 / 20 - 90 % Overall Grade (Highest Attempt) 19 / 20 - 95 % Question 1 1 / 1 point 1.12 Hide ques ! on 1 feedback Question 2 1 / 1 point The 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. Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follows: See Attached Excel for Data. movie data.xlsx Find the approximate sample standard deviation, s. Use the Excel function to find the Sample SD. Round to two decimal places. . use =STDEV.S function in Excel. 35.5 34.5 36.3 96

Hide ques ! on 2 feedback Question 3 1 / 1 point 7.83 Hide ques ! on 3 feedback Question 4 1 / 1 point 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? 79.5 use =STEDV.S function in Excel. 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 Use the information to respond to the following question: (round to 2 decimal places) use =STEDV.S function in Excel. BMW 3 Series BMW 5 Series BMW 7 Series

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 35-44 15.0 45-54 13.1 55-64 11.9 65+ 10.3 Which box plot most resembles the information above? Question 6 1 / 1 point None of these groups

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The following data represents the grades in a statistics course. Below is the frequency distribution and histogram. 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? Hide ques ! on 6 feedback 95 25 7 75 100

Question 7 1 / 1 point A histogram that is positively skewed is also called Question 8 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 Hide ques ! on 8 feedback Question 9 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. cat weight data.xlsx Hide ques ! on 9 feedback 2+1+7+6+7+2 skewed to the right balanced skewed to the left symmetric 3.7125 kg 3.9 kg 3.7 kg 3.6875 kg use =MEDIAN function in Excel use =MEDIAN function in Excel 3.6875 kg 3.7 kg 3.9 kg 3.7125 kg

Question 10 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 Hide ques ! on 10 feedback Question 11 1 / 1 point 64 Hide ques ! on 11 feedback Question 12 0 / 1 point Jesse was ranked 36th in his graduating class of 180 students. At what percentile is Jesse's ranking? use =AVERAGE function in Excel no mode 64 56 & 64 32 56 The two values that appear most often are 56 and 64. The following data show the height (in inches) of a sample of students. See Attached Excel for Data. height data.xlsx The median height of these students is inches. Do Not Round. use =MEDIAN function in Excel. 20th percentile 57th percentile 80th percentile 63rd percentile

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Hide ques ! on 12 feedback Question 13 1 / 1 point 280 Hide ques ! on 13 feedback Question 14 1 / 1 point 270.08 Hide ques ! on 14 feedback 36/180 = .20 This means he is in the top 20, which is the 80th percentile of the glass. Cholesterol levels were collected from patients two days after they had a heart attack (Ryan, Joiner & Ryan, Jr , 1985). Use Excel to find the 68th percentile. Do Not include any decimals. See Attached Excel for Data. cholesterol data.xlsx 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: 68th percentile Use Excel Functions =PERCENTILE.INC( ,.68) 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 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 Use Excel Functions =PERCENTILE.INC( ,.52)

Question 15 1 / 1 point The total frequency of the data whose ogive is shown below is approximately Hide ques ! on 15 feedback Question 16 0 / 1 point Eyeglassomatic manufactures eyeglasses for different retailers. The number of lenses for different activities is in table. Activity Grind Multicoat Assemble Make Frames Receive Finished Unknown Number of lenses 18872 12105 4333 25880 26991 1508 Grind means that they ground the lenses and put them in frames, multicoat means that they put tinting or scratch resistance coatings on lenses and then put them in frames, assemble means that they receive frames and lenses from other sources and put them together, make frames means that they make the frames and put lenses in from other sources, receive finished means that they received glasses from other source, and unknown means they do not know where the lenses came from. Based on the information above, which is the correct Pareto Chart? 34 18 12 90 The frequency count is along the y-axis.

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Question 17 1 / 1 point When an anthropologist finds skeletal remains, they need to figure out the height of the person. The height of a person (in cm) and the length of one of their metacarpal bone (in cm) were collected and shown in the table below. Create a scatter plot using Excel. height and length data.xlsx What type of a relationship, if any, exists between the height of a person and the length of their metacarpal? (2013, September 26). Retrieved from http://www.statsci.org/data/general/stature.html. Length of Metacarpal Height of Person

Length of Metacarpal Height of Person 45 171 51 178 39 157 41 163 48 172 49 183 46 173 43 175 47 173 Question 18 1 / 1 point A scatter plot would be useful for 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. Positive No relationship Negative Showing the relative number of sales of four different brands of blank DVDs Showing the relationship between the sales of blank CDs and blank DVDs Showing the trend of sales, over time, of five different brands of blank DVDs Showing the top selling brands of blank DVDs 20% of students are over 69 inches tall. 50% of students heights are less than 65 inches.

Hide ques ! on 19 feedback Question 20 1 / 1 point 85 Hide ques ! on 20 feedback Done The maximum observed height is 70 inches. There are 25 students in the sample. 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 The graph below is for pulse rates before and after exercise. Before Pulse Rates After 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? The Leaves on the right are for Before Exercise and the Leaves on the left are for After Exercise.

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MATH302 - Week 2 Test1

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