variable xx is normally distributed with mean 20 and standard deviation 6. Round your answers to the nearest hundredth as needed. c) What value of xx has a zz-score of 1.671.67? x=x= d) What value of xx has a zz-score of −0.7-0.7? x=x= e) What value of xx has a zz-score of 00? x=x=

Q: Suppose the standard deviation of the weights of all Florida manatees is 72 pounds. Let be the mean…

A: Solution-: Given: σ=72,s=7 we want to find necessary sample size (n)=?

Q: Suppose baby kittens' weights are normally distributed with a mean of 11.9 and a standard deviation…

A: a) Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Answer - A normal distribution with mean μ= 0  and σ = 1               Find P86,    the 86-…

Q: Assume that adults have IQ scores that are normally distributed with μ=38 and a standard deviation…

A:

Q: ence in mean life. Which brand would you prefer, based on this calculation? Car Brand 1 1 36,925…

A: Given : The data on two brands of radial tires is provided below. Car Brand 1 Brand 2 1 36925…

Q: In a​ country, the mean time served by prisoners released from prison for the first time is 31.5…

A: Mean time = 31.5Standard deviation = 16.3

Q: The mean square footage is x = 2,415 (Round to the nearest integer as needed.) The standard…

A:

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A: We have given that  The readings at freezing on a bundle of thermometers are normally distributed…

Q: Assume that adults have IQ scores that are normally distributed with μ=105 and a standard deviation…

A: Assume that adults have IQ scores that are normally distributed with μ=105 and a standard deviation…

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: The provided information is as follows:The random variable  is readings at freezing on a batch o…

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 233 cm.…

A:

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

Q: 2. A score that is 9 points above the mean corresponds to a z-score of 1.5. What is the standard…

A: Given information x - µ = 9 z = 1.5

Q: The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 70…

A: We are reauthorized to answer three sub parts at a time, since you have not mentioned which part you…

Q: 2. Give an interval that covers the middle 95% of the distribution of the sample mean. etween Lower…

A: Given: Mean μ=25000 Standard deviation σ=1600

Q: Approximate the standard deviation of age for males. I already know that the population mean is…

A: Given data table is,Agemalesfemales0 - 910510 - 1910720 - 29171630 - 39181640 - 49212250 - 59232560…

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A:

Q: Scores had a Mean of 82 and a Standard Deviation of 5 0. Find a z score for x =81 and x = 68 Z-…

A:

Q: The coefficient of variation (CV%) is a normalized measure of the dispersion of a distribution. It…

A: given data  ∑x = 61.2∑x2 = 444.6n = 16cv% = ?

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A:

Q: Suppose that the blood pressure of the human inhabitants of a certain Pacific island is distributed…

A:

Q: On average indoor cats live to 14yrs oldvwith a standard deviation of 2.4 yrs.Suppose the…

A: It is given that the mean is 14 and the standard deviation is 2.4.

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: The z-score:The z-score of a normally distributed random variable, X, with mean μ and standard…

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 100 and a…

A: Let X be the random variable from normal distribution with mean (μ) = 100 and standard deviation (σ)…

Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?

A:

Q: Use the formula to find the standard error of the distribution of differences in sample means,…

A: For population 1:n1=100  ,  σ1=10   , μ1=95For population 2:n2=80 , σ2=17  ,  μ2=76