7. Assume z is a standard normal random variable. Then P(-1.20 < z s 1.50) equals 0.4332 .3849 .8181 .0483

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A: d. The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the…

Q: If Z denotes the standard normal random variable , then  P( -.58 &lt; Z &lt; .23) ?

A: The z-score is the number of standard deviations by which an event is occurring is over the mean…

Q: The list below shows the ages (in years) of 8 people riding in a van to a math competition.…

A: Obtain the value of mean.   The value of mean is obtained below as follows:   Use EXCEL Procedure…

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A: From the provided information, Mean (µ) = 3 P (X &gt; 4.6) = 0.3

Q: Suppose x is a normally distributed random variable with u = 10 and o = 2. Find each of the…

A:

Q: A) y= Q25. The correlation coefficient (r) between X A)-0.8987 B) 0.8632 C) -0.9603 enswer: D)

A: We have given that,  X :- 3, 4, 6, 8, 10 Y:- 8, 6, 7, 5, 3 Then,  We will find the correlation…

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Q: Let X be a random variable with expected value 2 and variance 13. According to the Chebyshev…

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Q: Assume z is a standard normal random variable. Then P(-1.2 sz s 1.04) equals. O a. 0.0341 Ob. 0.3849…

A: Z has follows standard normal distribution with mean zero and standard deviation one.

Q: Use Appendix Table III to determine to 5 decimal places the following probabilities for the standard…

A: Dear student according to the guidelines we solve only first three subparts only. Solution Here Z is…

Q: Find the following probabilities for the standard normal rando variable z: (a) P(-0.71 ≤z≤ 1.87)=…

A: The following probabilities for the standard normal random variable z: (a) P(-0.71 ≤ z ≤ 1.87(b)…

Q: Calculate the mean (mu)  and variance (sigma squared) of the probability distribution

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Q: If ZZ is a random variable from a standard normal distribution and if P(Z<b)=0.6P(Z<b)=0.6, then…

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Q: If Z is a random variable from a standard normal distribution and if P(Z < d) = 0.77, then P(Z < -…

A: Given that P(Z&lt;d)=0.77P(Z&lt;-d)=0.23 Consider,        P(Z&lt;d)=0.771-P(Z≥d)=0.77…

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Q: For a standard normal random variable Z, P(-0.86<Z<-0.24) =?

A:

Q: Use Appendix Table III to determine to 5 decimal places the following probabilities for the standard…

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Q: Consider a normally distributed random variable X with a mean u = 30 and a standard deviation ? = 2.…

A: GivenMean(μ)=30standard deviation(σ)=2

Q: Let Z denote the standard normal random variable, ?(−.54<?≤.78)is closest to

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Q: True or False, For a standard normal random variable Z, P(0 < Z < 1.2) = P(-1.2 < Z < 0 )?

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Q: neve through a cer marked as sp You've heard that at ist 65% of the email you You suspect this is…

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A: Given data normal distributionμ = 6σ = 3

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A: given data  normal distribution  μ = 5 P(x&gt;6.7) = 0.28 P(5&lt;x&lt;6.7) = ?

Q: A) 0.3846 B) 0.3223 *Consider the following table, and answer the following Two questions Q24. Find…

A: