Math 302 Knowledge Test 2 Questions And Answers( Complete Solution)

Math 302 Knowledge Test 2 Questions And Answers Question 1 of 20 0.0/ 1.0 Points final grade 8 KB An instructor wants to compare spread (variation) of final grades of students in her online class and face-toface 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. The standard deviation of final grades for the face-to-face class is .Use the information to respond to the following question:(keep 2 decimal places) Answer Key:11.9|11.90 Feedback:use =STDEV.S function in Excel. Question 2 of 20 0.0/ 1.0 Points FTES 8 KB 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. Mean: Calculate the mean. Round to one decimal place. Answer Key:1810.7 Feedback:use =AVERAGE function in Excel Question 3 of 20 1.0/ 1.0 Points FTES 8 KB 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. Standard Deviation: 167 Calculate the standard deviation. Round to one decimal place. Answer Key:167.0| 167 Feedback:use =STDEV.S function in Excel. Part 2 of 8 - Box Plot Knowledge Check Homework Practice 2.0/ 2.0 Points Question 4 of 20 1.0/ 1.0 Points The length of the box in the boxplot portrays the  A. median  B. mean  C. interquartile range  D. range Answer Key:C Feedback:IQR = Q3 - Q1 Question 5 of 20 1.0/ 1.0 Points For a boxplot, the vertical line inside the box indicates the location of the  A. inter quartile range  B. mean  C. median  D. mode Answer Key:C Feedback:The Median is also known as Q2 or the second quartile value. Part 3 of 8 - Displaying Data Knowledge Check Homework Practice 2.0/ 2.0 Points Question 6 of 20 1.0/ 1.0 Points 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?  A. 50%  B. 99.7%  C. 68%  D. 95% Answer Key:D Question 7 of 20 1.0/ 1.0 Points A histogram that has a single peak and looks approximately the same to the left and right of the peak is called:  A. balanced  B. bimodal  C. symmetric  D. proportional Answer Key:C Part 4 of 8 - Measures of Central Tendency Knowledge Check Homework Practice 3.0/ 4.0 Points Question 8 of 20 0.0/ 1.0 Points 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?  A. Symmetric  B. Skewed Right  C. Skewed Left  D. Cannot be determined Answer Key:B Question 9 of 20 1.0/ 1.0 Points Which of the following statements is true for the following data values: 7, 5, 6, 4, 7, 8, and 12?  A. Only the median and mode are equal  B. The mean, median and mode are all equal  C. Only the mean and mode are equal  D. Only the mean and median are equal Answer Key:B Question 10 of 20 1.0/ 1.0 Points Cholesterol levels were collected from patients two days after they had a heart attack (Ryan, Joiner & Ryan, Jr, 1985). Find the mean. Round to 4 decimal places. See Attached Excel for Data. cholesterol 8 KB  A. 253.9286  B. 248.3245  C. 236  D. 268  E. 235.2593 Answer Key:A Feedback:use =AVERAGE function in Excel Question 11 of 20 1.0/ 1.0 Points The following data show the amount (in ounces) of beverage in randomly selected 16-ounce beverage cans. See Attached Excel for Data. The mode of this data is ounces 8 KB  A. 15.7  B. 16.1  C. no mode  D. 15.8  E. 15.6 Answer Key:A Feedback:The value that appears most often is 15.7 Part 5 of 8 - Measures of the Location of Data Knowledge Check Homework Practice 0.0/ 3.0 Points Question 12 of 20 0.0/ 1.0 Points cholesterol 8 KB Cholesterol levels were collected from patients two days after they had a heart attack (Ryan, Joiner & Ryan, Jr , 1985). Use Excel to find the 38th percentile. Round to two decimal places. See Attached Excel for Data. Retrieved from Fill in each of the values below: 38th percentile Answer Key:237.56 Feedback: Use Excel Functions =PERCENTILE.INC( ,.38) Question 13 of 20 0.0/ 1.0 Points cholesterol 8 KB 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. Answer= Hint: Use =PERCENTILE.INC function in Excel or use textbook formula (n+1)p/100 Retrieved from Answer Key:294.5 Feedback:Use =PERCENTILE.INC( , .89) in Excel. Question 14 of 20 0.0/ 1.0 Points cholesterol 8 KB Cholesterol levels were collected from patients two days after they had a heart attack (Ryan, Joiner & Ryan, Jr , 1985). Use Excel to find the 50th percentile See Attached Excel for Data. Retrieved from Fill in each of the values below: 50th Answer Key:268 Feedback: Use Excel Functions =PERCENTILE.INC( ,.50) or =MEDIAN The 50th percentile is also the median value. Part 6 of 8 - Ogives, Pareto and Pie Chart Knowledge Check Homework 1.0/ 2.0 Points Question 15 of 20 1.0/ 1.0 Points The following table summarizes the distribution of students by academic class. Academic Class Frequency Freshman 22 Sophomore 13 Junior 10 Senior 5 Select the correct bar graph for the distribution of students by academic class.  A.  B.  C. Answer Key:C Question 16 of 20 0.0/ 1.0 Points 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 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?  A. Received Finished  B. Make Frames  C. Unknown  D. Multicoat  E. Assemble  F. Grind Answer Key:A Part 7 of 8 - Scatter Plots Knowledge Check Homework 2.0/ 2.0 Points Question 17 of 20 1.0/ 1.0 Points 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). Retrieved from  A. 1.5  B. 5.5  C. 7.5  D. 3.5 Answer Key:A Feedback:76 along the x-axis matched up with approximately 1.5 along the y-axis. Question 18 of 20 1.0/ 1.0 Points A scatterplot allows one to see:  A. whether there is any relationship between two variables  B. what type of relationship there is between two variables  C. Both (a) and (b) are correct  D. Neither (a) nor (b) is correct Answer Key:C Part 8 of 8 - Stem and Leaf Knowledge Check Practice 0.0/ 2.0 Points Question 19 of 20 0.0/ 1.0 Points 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 7 0 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? 9 Answer Key:104 Feedback:The Leaves on the right are for Before Exercise and the Leaves on the left are for After Exercise. Question 20 of 20 0.0/ 1.0 Points The following data show the height (in inches) of a sample of students. Fill in the blanks to create a stem leaf plot for these data. Key is 6|3 = 63. Report values for Leaf column in increasing order and do not keep spaces or place commas between values . Stem Leaf 6 7 Answer Key:|1 2 4 4 5 6 7 7 7 7 7 7 8 9 9 9, 0111|0 1 1 1