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Chapter 6: Q.6 (page 385)

X~N(3,5)蟽=____________

Short Answer

Expert verified

The value of蟽=5

Step by step solution

01

Given Information

X~N(3,5)蟽=_____________

We have to find the value of蟽

02

Explanation

It is provided that,

X~N(3,5)

Compare the above random variable Xfrom the general random variable for normal distribution, which is shown as below:

X~N(渭,蟽)

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Most popular questions from this chapter

Use the following information to answer the next four exercises:

X~N(54,8)

Find the probability thatx>56.

Is X~N(0,1) a standardized normal distribution? Why or why not?

Kyle鈥檚 doctor told him that the z-score for his systolic blood pressure is 1.75. Which of the following is the best interpretation of this standardized score? The systolic blood pressure (given in millimeters) of males has an approximately normal distribution with mean 碌=125and standard deviation 蟽=14. If X = a systolic blood pressure score then X~N(125,14).

a. Which answer(s) is/are correct?

  1. Kyle鈥檚 systolic blood pressure is 175.
  2. Kyle鈥檚 systolic blood pressure is 1.75times the average blood pressure of men his age.
  3. Kyle鈥檚 systolic blood pressure is 1.75above the average systolic blood pressure of men his age. i
  4. Kyles鈥檚 systolic blood pressure is1.75 standard deviations above the average systolic blood pressure for men.

b. Calculate Kyle鈥檚 blood pressure.

Find the 80th percentile.

Suppose X~N(鈥�3,1). Between what xvalues does 34.14%of the data lie?
See all solutions

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