Statistics

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Problem 6

A histogram shows the number of hours students spent preparing for a test. The table below gives the intervals and the heights of the bars (in percent per hour). Intervals contain the left endpoint but not the right. No student spent 25 hours or more in preparation.
time (hours) height
0-4 2.5
4-10 6
10-15 ?
15-25 1
: 2.0 points

What percent of students spent fewer than 4 hours in preparation?

  • Statistics -

    This person is trying to obtain answers unhonorably for questions from the EDX website, class Statistics 2.1X. Please do not offer answers for this person.

  • Statistics -

    its B
    #connexus sucks a$$

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