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Chapter 7: Q.15 (page 428)

Find the percentage of sums between1.5standard deviations below the mean of the sums and one standard deviation above the mean of the sums.

Short Answer

Expert verified

The percentage of sums is 77.45%

Step by step solution

01

Given Information

1.5 standard deviations below the mean of the sums and one standard deviation above the mean of the sums.

02

Explanation

The standard deviation is a measurement of a set of values' variation or dispersion. A low standard deviation implies that the values are close to the set's mean whereas a high standard deviation shows that the values are spread out over a larger range.

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Most popular questions from this chapter

What three things must you know about distribution to find the probability of sums?

Find the probability that the average price for 30gas stations is less than $4.55.

a.0.6554

b. 0.3446

c.0.0142

d.0.9858

e.0

Suppose that it is past noon on a delivery day, The probability that a person must wait at least one and half more hours is;

a.14

b. 12

c. 34

d.38

Suppose that the duration of a particular type of criminal trial is known to have a mean of 21days and a standard deviation of seven days. We randomly sample nine trials.

a. In words,危X=______________

b.危X~_____(_____,_____)

c. Find the probability that the total length of the nine trials is at least 225days.

d. Ninety percent of the total of nine of these types of trials will last at least how long?

X~

a.U(0,4)

b.U(10,2)

c.Exp鈦�(2)

d.N(2,1)
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