Business Statistics Exam I -Chapters 1-3 The following data shows the number of
ID: 3072148 • Letter: B
Question
Business Statistics Exam I -Chapters 1-3 The following data shows the number of students that came to office hours per day for a particular faculty member. 26. Create a table to show the frequency distribution, a relative frequency distribution, and a cumulative frequency distribution for the data above. (15 points) Cumulative umber of Students Frequency Frequency Frequency Total 27. Using Excel, enter the data listed in the data set for problem number 26 and create a histogram. Place your name in a cell that is below the histogram and print the histogram. Tum the histogram in with your exam. (2.5 points) 28. Based on the data from the table and the histogram. What is the likelihood (probability) that the professor will not be visited by any students? (2.5) Answer questions #29-34 based on the data set below. Use written calculations to show your work for each problem: Remember you can verify your results in Excel. There are currently seven statistics classes being taught this semester at Wilmington College. The following data represent the number of students in each class. 20 25 18 32 22 30 28 29. Calculate the mean of this population. (2 points) 30. Calculate the median of this population. Use written calculations to show your work (2 points)Explanation / Answer
29)
mean = ( 20 +25 + 18 + 32 + 22 + 30 + 28)/7
= 25
30)
Median
Arrange the data in ascending order middle number is the median of data
18 20 22 25 28 30 32
25 is the median of this population
31)
Mode is the number that appears most often in a set of numbers.
No mode
33)
variance = ( 20 -25)^2 + (25 -25)^2 + (18 -25)^2 + (32 -25)^2 + (22 -25)^2 + (30 -25)^2 + (28 -25)^2/7
= 20.75
34)
Standard deviation = sqrt(variance)
= sqrt(20.75)
= 4.5552
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