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18 August, 05:51

An anatomy teacher hypothesizes that the final grades in her class are distributed as 10% A's, 23% B's, 45% C's, 14% D's, and 8% F's. At the end of the semester, she has the following grades.

A 6

B 14

C 22

D 8

E 4

Test her claim at 5% significance level.

+4
Answers (1)
  1. 18 August, 06:18
    0
    At a plus or minus 5%

    Her claim is wrong

    Step-by-step explanation:

    Ok ...

    Let's calculate the total amount of result first.

    6 + 14+22+8+4 = 54.

    Let's take the percentage of each.

    For A

    6/54 = 0.11

    11.1%

    11.1%*5% = 10.5

    For B

    14/54

    =0.25925

    = 25.9%

    25.9%*5% = 24.605

    For C

    22/54

    0.4074

    40.7%

    40.7*5% = 42.73%

    For D

    8/54

    = 0.148

    14.8%

    14.8%*5% = 14.06%

    For E

    4/54

    = 0.074

    = 7.4%

    7.4%*5%=7.77%

    But she suggested

    10% A's, 23% B's, 45% C's, 14% D's, and 8% F's
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