MATH302 - Week 2 Knowledge Check Homework1

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Feb 20, 2024

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Week 2 Knowledge Check Homework Practice Quest… Attempt 2 of 4 Written Jan 9, 2024 8:50 PM - Jan 9, 2024 9:53 PM Attempt Score 17 / 20 - 85 % Overall Grade (Highest Attempt) 19 / 20 - 95 % Question 1 0 / 1 point 152.5 (167.0, 167) Question 2 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 Standard Deviation: Calculate the standard deviation. Round to one decimal place. 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 sample mean.

1.48 Hide ques ! on 2 feedback Question 3 1 / 1 point Suppose that a manager wants to test two new training programs. They randomly select 5 people for each training type and measure the time it takes to complete a task after the training. The times for both trainings are in the attached Excel file. Which training method is more variable? training data.xlsx Hide ques ! on 3 feedback Question 4 1 / 1 point The length of the box in the boxplot portrays the Round to two decimal places. Use the Excel function to find the Average. use =AVERAGE function in Excel. Training 1 Training 2 They have the same mean so the variability is the same. Training 1 because the SD and Variance are bigger. range interquartile range median mean

Hide ques ! on 4 feedback Question 5 0 / 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. What is the interquartile range for the BMW 5 Series? Hide ques ! on 5 feedback IQR = Q3 - Q1 about 32 years about 17 years about 42 years about 63 years

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Question 6 1 / 1 point Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four cars; twelve generally sell five cars; nine generally sell six cars; eleven generally sell seven cars. Complete the table. Data Value (# cars) Frequency Relative Frequency Percent Cumulative Relative Frequency 3 14 21.5% 4 19 29.2% 5 12 18.46% 6 9 13.8% 7 11 16.9% What does the Frequency column in the table sum to? Hide ques ! on 6 feedback IQR = Q3 - Q1 Q3 = 55 and Q1 is roughly 38. 14 65 19.8 25

Question 7 1 / 1 point The following data represents the grades in a statistics course. Below is the frequency distribution and histogram. 14 + 19 + 12 + 9 + 11

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 What was the approximate lowest and highest grade in the class? Hide ques ! on 7 feedback Question 8 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 histogram, what is the shape of the distribution? 4 and 28 40 and 100 65 and 85 40 and 99.9 45 and 95 Lowest value is 40 and the highest value in the Class Limit is 99.9

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Question 9 0 / 1 point Cholesterol levels were collected from patients two days after they had a heart attack (Ryan, Joiner & Ryan, Jr, 1985). Find the mode. See Attached Excel for Data. cholesterol data.xlsx Skewed Right Symmetric Skewed Left Cannot be determined 282

Hide ques ! on 9 feedback Question 10 1 / 1 point The following histogram shows the distribution percent return on stocks from 1971-2010. The shape of this distribution is: (source: http://www.softschools.com/math/probability_and_statistics/ shapes_of_distributions/) 288 280 236 All of the above 236, 280, 282 and 288 all appear twice. symmetric left skewed (skewed negative)

Question 11 1 / 1 point 27 Hide ques ! on 11 feedback Question 12 1 / 1 point 294.5 Hide ques ! on 12 feedback right skewed (skewed positive) 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 Identify the Median. Do not Round. boat length data.xlsx Use =MEDIAN function 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 the 89th 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( , .89) in Excel.

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Question 13 1 / 1 point 68.7 Hide ques ! on 13 feedback Question 14 1 / 1 point 62.75 Hide ques ! on 14 feedback 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 78th percentile. Round one decimal place. years Hint: Use =PERCENTILE.INC function in Excel use =PERCENTILE.INC( , .78) in Excel. The following data show the height (inches) of a sample of students. See Attached Excel for Data. height data.xlsx Use the Excel function to find the Quartile. The 1st quartile of heights of these students is inches. Using the information in the chart, fill in the blank below. Round to two decimal places.

Question 15 1 / 1 point The following graph represents a random sample of car models driven by college students. What percent of college students drove a Nissan? Question 16 1 / 1 point Eyeglassomatic manufactures eyeglasses for different retailers. The number Use =QUARTILE.INC( , 1) in Excel. 40% 20% 12% 24% 10%

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. If you were making a pareto graph in Excel what would be the first label name? Question 17 1 / 1 point A scatter plot for a random sample of 24 countries shows the average life expectancy and the average number of births per woman (fertility rate). What is the approximate fertility rate for a country that has a life expectancy of 76 years? (2013, October 14). Assemble Make Frames Unknown Received Finished Grind Multicoat

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Retrieved from http://data.worldbank.org/indicator/SP.DYN.TFRT.IN Hide ques ! on 17 feedback Question 18 1 / 1 point What kind of relationship between x and y is demonstrated by the scatter plot below? 7.5 1.5 5.5 3.5 76 along the x-axis matched up with approximately 1.5 along the y-axis.

Hide ques ! on 18 feedback Question 19 1 / 1 point No linear relationship A negative linear relationship This is not a scatter plot A positive linear relationship The trend is moving downward in a negative direction 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 Stem and do not keep spaces or commas between leaves. Stem Leaf

14 (33.33 %) 15 (33.33 %) 16 (33.34 %) Question 20 1 / 1 point 104 Hide ques ! on 20 feedback (a) 8 (b) 257889 (c) 011 (a) (b) (c) 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 fastest pulse rate of the before exercise group?

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Done The Leaves on the right are for Before Exercise and the Leaves on the left are for After Exercise.

MATH302 - Week 2 Knowledge Check Homework1

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