View the step-by-step solution to:

In Exercise 4.5, you were asked to depict graphically the distribution of the following sample of statistics exam completion times (in minutes):

In Exercise 4.5, you were asked to depict

graphically the distribution of the following

sample of statistics exam completion times

(in minutes):

61 86 61 58 70 75 66 77 66 64

73 91 65 59 86 82 48 67 55 77

80 58 94 78 62 79 83 54 52 45

Find the mean and the median of this set of

completion times.

b Using the frequency distribution in Exercise

4.5, determine the mode as the midpoint of

the modal class.


c Locate the mean, the median and the

mode on the relative frequency histogram

constructed in Exercise 4.5.

d Use the shortcut formula to find the variance

of this sample of completion times.


why short cut formula is different?, can you explain this part?Capture.JPG

Capture.JPG

Recently Asked Questions

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question