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vladimir1956 [14]
3 years ago
8

On a test that has a normal distribution, a score of 60 falls two standard deviations above the mean, and a score of 42 falls on

e standard deviation below the mean. Determine the mean of this test
Mathematics
2 answers:
Sergeu [11.5K]3 years ago
7 0

Answer:

48

Step-by-step explanation:

Given that:

A  \ score  \ of \  60  \ falls \  two  \ standard   \ deviations \  above \  the \ mean \\ \\ A \  score \ of \ 42  \ falls \  one  \ standard  \ deviation \ below  \ the \ m ean

The interval for score = 60 - 42 = 18

If we divide it by the 3 standard deviations; the interval result into

= 18/3

= 6

So, the standard deviation is 6, and the mean = 42 + 6

= 48

Likurg_2 [28]3 years ago
6 0

Answer:

51

Step-by-step explanation:

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