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docker41 [41]
3 years ago
15

solve The mean score of a competency test is 60, with a standard deviation of 5. Between what two values do about 68% of the val

ues lie? (Assume the data set has a bell-shaped distribution.
Mathematics
1 answer:
Anna11 [10]3 years ago
5 0

Answer:

Between 55 and 65

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed(bell-shaped) random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 60

Standard deviation = 5

Between what two values do about 68% of the values lie?

By the Empirical Rule, within 1 one standard deviation of the mean. So from 60-5 = 55 to 60+5 = 75.

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Step-by-step explanation:

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v=110/3≈36.67 miles/h.

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Step-by-step explanation:

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