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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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Romashka [77]

The amount Lanny paid for 1.4 pounds of rice is 0.56 dollars.

<h3>How to find how much she paid for the rice?</h3>

Lanny bought 1.4 pounds of rice that cost $0.40 per pound. The amount of money Lanny paid for the rice can be calculated as follows;

The amount she paid for 1.4 pounds of rice can be calculated by using the rate of the cost per pound of the rice.

Therefore,

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6 0
1 year ago
Assigned Media
kenny6666 [7]

Answer:

1,203,650,000 mi³

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= 1,203,649,920 mi³

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4 quarters. Each quarter costs 25 cents. 25 x 4=100. There are 100 cents in a 1 dollar, so that's why 4 quarters= 1 dollar.

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3 years ago
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4.2z + 3.8z simplify the expression ​(Use the operation symbols in the math palette as needed. Simplify your answer. Use whole n
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Since these are like terms, add the numbers together and then put the z on.

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