Calculate: a= Answer b= Answer TIP: Use expected value and variance properties.

Q: 12. The red blood cell count for a population of adult males can be approximated by a normal…

A: We have given that  X~N( μ , ?^2 )    μ = 5.4    , ? = 0.4   Z-score =( x - μ )/?  ,

Q: You are interested in whether or not two measures of children behaviour  are equlvalent. The…

A:

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A:

Q: The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test…

A: It is given that: For the Accuplacer test, Meanμ1=40 Standard deviationσ1=9 For the GPAs,…

Q: The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test…

A: The mean of the Accuplacer test,  The standard deviation of the Accuplacer test, The mean of High…

Q: If the Standard Deviation of a data set is 2.1, what is the variance of that data set? State your…

A:

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: The weight of football players is normally distributed with a mean of 200 pounds and a standard…

A: Given,mean(μ)=200standard deviation(σ)=25

Q: a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean…

A: We have to find 60th percentile.

Q: the score of ryan in English is 1 unit standard deviation above the mean. His score in Mathematics…

A: Given information Z score=1 for English Z score=0.5 for Mathematics

Q: Scores by women on the SAT-1 test are normally distributed with a mean of 988 and a standard…

A: Given Information Now we have to calculate corresponding Z value                         Z = 0.7388…

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Determine the level of significance.   Significance level:    In order to decide how small the…

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: The range and the variance are both measures of distance.

A: Solution-: The range and the variance are both measures of distance.

Q: A statistics test has a mean of 60 and a standard deviation of 10 while an accounting test has a…

A: Given information Statistics test Mean µ = 60 Standard deviation σ = 10

Q: A z-score of −1 tells us that a score fell one standard deviation below the mean in a group of…

A: Empirical rule: For a normal distribution, the approximate values that fall in the specified…

Q: The mean of a distribution is 14 and the standard deviation is 5.

A: Given information: The mean of the distribution is 14 and the standard deviation is 5. Formula for…

Q: |(a) What are the null hypothesis Ho and the alternative hypothesis Hj that should be used for the…

A: Test is that whether the mean weight of babies is greater than 7.2 pound. The type I error is…

Q: How many minutes did it take him to finish the face?

A: It is given that the distribution of finishing time for men was approximately normal with mean 242…

Q: The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test…

A: The distirbutions of the Accuplacer test and High School GPAs are given.

Q: A painter purchases two types of paints, paint A and paint B. The amount of paint A purchased per…

A: Expected amount spent by firm on both types of paints combined is as follows…

Q: of driver's education students is 68 points, with a standard deviation of 4 points. Apply…

A: Given

Q: This year’s group of high school students did poorly on their final exams (M = 69, s = 11.3),…

A: Given information- We have given the mean and standard deviation of the high school students final…

Q: 2. The ages of the 189 people were recorded in a clinical study. The data have been partially…

A: The given data is as follows,…

Q: It has been reported that the standard deviation of the speeds of drivers on interstate -35 near…

A: It has been reported that the standard deviation of the speeds of drivers is 6.8 miles per hour for…

Q: e are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a…

A: For ACT scores:Mean of the distribution, Standard deviation of the distribution, The distribution of…

Q: What is the raw z-score?

A: Given information Population Mean = mu= 120 Standard deviation = s= 50 Raw score = x =65 Z score = ?

Q: However, a random sample of 30 US women has a mean height of 67 inches with standard deviation of…

A: The mean height of US women is at most =65 inchesThe random sample n=30standard deviation =6.2level…

Q: The monthly income of trainees at a local mill is normaly distributed with a mean of $3300 and…

A:

Q: Sergio is doing a long hike and is carefully calculating his pack weight. An energy bar has mean…

A:

Q: The scores on the Accuplacer test and high school GPAs are normally distributed. The accuplacer test…

A:

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: GivenHighest speed measured (x)=78.4Mean(x)=18.37standard deviation(s)36.54

Q: ... Since the z score for the tallest man is z = and the z score for the shortest man is z = | , the…

A: The tallest living man at one time had a height of 238 cm. The shortest living man at that time had…

Q: Test scores for an algebra class had a mean of 78 with a standard deviation of 4.1. Test scores for…

A:

Q: The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test…

A: The mean of the Accuplacer test, The standard deviation of the Accuplacer test, The mean of the High…

Q: Give the mean and the standard deviation of the distribution of means for mean=100; Variance=100;…

A:

Q: The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 19 people…

A: From the provided information,

Q: If the standard deviation of a variable is 4​, what is the​ variance?   ​(This is a reading…

A: Given information: The standard deviation of the variable is 4.

Q: In your two sets of Statistics tests, find the mean of the number of tests that will be passed. 1.…

A: Given: The provided dataset is given as: Number of passed test (x) Probability P(x) 0 0.25 1…

Q: As reported in Runner's World Magazine, the times of finishers in the New York City 10-km run are…

A: Given information- Population mean, µ = 60 minutes Population standard deviation, σ = 7 minutes Let,…

Q: The earned run average of the two players is 3.7 each but the mean absolute deviation (MAD) for…

A: Mean Absolute Deviation : The MAD is the average of absolute deviations of observations from its…

Q: The manager at UPS feels that the weights of packages shipped recently are less than in he past.…

A: Given  Population mean μ=36.7, standard deviations σ=14.2, level of significance=0.01, n=64, sample…