Latavia King - MATH302 D004 Winter 2024 - APEI

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Apr 26, 2024

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Week 2 Knowledge Check Homework Practice Questions - Re… Attempt 1 of 4 Written Mar 13, 2024 8:06 PM - Mar 13, 2024 8:51 PM Attempt Score 18 / 20 - 90 % Overall Grade (Highest Attempt) 18 / 20 - 90 % Question 1 1 / 1 point ___ 11.90___ Hide ques±on 1 feedback Question 2 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 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 The standard deviation of final grades for the face-to-face class is Use the information to respond to the following question: (round to 2 decimal places) Use the Excel function to find the Sample SD use =STDEV.S function in Excel.

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 2 feedback Question 3 1 / 1 point A sample of 8 cats found the following weights in kg. What is the standard deviation? See Attached Excel for Data. Use the Excel function to find the Sample SD. cat weight data.xlsx Hide ques±on 3 feedback Question 4 1 / 1 point Which of the following statements are false regarding a boxplot? Training 1 Training 2 They have the same mean so the variability is the same. Training 1 because the SD and Variance are bigger. 0.9 0.104 0.275 0.087 0.295 use =STDEV.S function in Excel. The length of the box equals the range of the data.

Question 5 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. What is the interquartile range for the BMW 5 Series? Hide ques±on 5 feedback Boxplots can be used to either describe a single variable in a data set or to compare two (or more) variables The height of the box has no significance. The right and left of the box are the third and first quartiles about 32 years about 17 years about 42 years about 63 years IQR = Q3 - Q1 Q3 = 55 and Q1 is roughly 38.

Question 6 1 / 1 point A histogram that has a single peak and looks approximately the same to the left and right of the peak is called: 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 two standard deviations of the mean? Question 8 1 / 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 Hide ques±on 8 feedback symmetric bimodal balanced proportional 99.7% 95% 68% 50% 282 288 280 236 All of the above

Question 9 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? 236, 280, 282 and 288 all appear twice. Skewed Right Symmetric Skewed Left Cannot be determined

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