A set of 900 exam scores is normally distributed with a mean = 72 and standard deviation = 8. How many students scored higher than 72? How many students scored between 64 and 80? How many students scored between 56 and 88?

Q: A set of 1200 exam scores is normally distributed with a mean = 82 and standard deviation = 10. How…

A: Note : - As per our policy we can answer only three sub-parts, please make a new requests for other…

Q: The mean score on a standardized test is 540 with a standard deviation of 55. What percent of…

A: Given mean= 540 Standard deviation=SD= 55 We have to find the z value of 625.

Q: A normally distributed data set has a mean of 0 and a standard deviation of 2. What is the percent…

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Q: Assume that the number of pieces per bag has a mean of 264 with a standard deviation of 3. use the…

A: Given :  the number of pieces per bag has a mean of , μ=264  a standard deviation of , σ =3   We…

Q: A set of 600 exam scores is normally distributed with a mean = 82 and standard deviation = 10. How…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

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Q: What is the corresponding z score, mean is 60, standard deviation is 8.1, X=72

A: We have to find z score.

Q: The test scores of a physics class with 800 students are distributed normally with a mean of 75 and…

A: Given: Number of students=800 Test score is normally distributed with mean,μ =75sd,σ=7

Q: assume that IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. If…

A: Here we need to find x such that P (X>x)=0.01, where X~N(100,15).

Q: Assume that adults have IQ scores that are normally distributed with a mean of 98.7 and a standard…

A: Given data, μ=98.7σ=16.2P(X<x)=25%x=?

Q: A set of 1500 exam scores is normally distributed with a mean = 74 and standard deviation = 6. How…

A:

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15.  a. In a sample of…

A: X follows a Normal distribution with mean = 100 and S.D = 15 Then z=(x-mean)/SD = (x-100)/15…

Q: A set of 900 exam scores is normally distributed with a mean = 82 and standard deviation = 5. How…

A: Hi, thanks for posting the question. Since there are more than three sub parts posted in the…

Q: Students at Roseville High School took an IQ test with a mean of 100 and a standard deviation of 15.…

A: GivenMean(μ)=100standard deviation(σ)=15

Q: When Victoria goes bowling, her scores are normally distributed with a mean of 130 and a standard…

A: In this question we will use basic of normal distribution of probability.  First we will find…

Q: 8. The mean life of a battery is 50 hours with a standard deviation of 6 hours. The manufacturer…

A: Disclaimer : Since you have asked multiple question, we will solve the one question for you. If you…

Q: For woman at Hartford college, times to run 400 meters are normally distributed with a mean of 85…

A: Solution: Let X be the time to run 400 meters. From the given information, X follows normal…

Q: Suppose the exam average in a class is 82% with a standard deviation of 2. What proportion of…

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Q: The final exam is worth 200 points with the usual 10% grading scale. Assume that the final exam…

A: Given Information: Mean (u) = 161 points Standard deviation (s) = 22

Q: A set of 900 exam scores is normally distributed with a mean = 84 and standard deviation = 6. How…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: The average life span of 360 people is recorded to be normally distributed with a mean of 65 years…

A:

Q: The cholesterol levels of a group of young women at a university are normally distributed, with a…

A: Given μ=190σ=37 Let X: Random variable for the cholesterol level of young women Then X~N(190,372)

Q: The vocabulary test scores for the population of third graders is normally distributed with a mean…

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Q: A set of chemistry exam scores are normally distributed with a mean of 70 points and a standard…

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Q: When Christian runs the 400 meter dash, his finishing times are normally distributed with a mean of…

A:

Q: If the mean score on the final exam is 70 with a standard deviation of 10 then the test score of a…

A: Given Mean =70 Standard deviations=10 Z=-1.5

Q: Suppose the scores of students on a Statistics course are Normally distributed with a mean of 440…

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Q: The scores of the students in the final examination are normally distributed with a mean of 72 and a…

A:

Q: set of 900 exam scores is normally distributed with a mean = 82 and standard deviation = 5. How…

A: It is given that the exam scores follow a normal distribution with mean 82 and standard deviation 5.…

Q: An IQ exam has a mean of 110 and a standard deviation of 12. What percent of people have an IQ score…

A: Given that.   X~N( μ , ?^2 )   μ=110     , ?=12   Z-score =( x - μ )/?

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of…

A: GivenMean(μ)=72standard deviation(σ)=9

Q: In a qualifying examination for admittance to the BS Psychology. the mean score was 75 and the…

A:

Q: On a standardized test, Jose scored an 87 and Mia scored a 74. The distribution of test scores for…

A: Given Data : Population Mean,μ = 76.28 Population Standard Deviation,σ = 7.02

Q: Sean’s exam score was 1.93 standard deviations below the mean. If the exam has a mean of 72 and a…

A: The provided information are: Population mean (µ) = 72 Population standard deviation (σ) = 5 Sean’s…

Q: The lengths of pregnancies in a small rural village are Normally distributed with a mean of 265 days…

A: Obtain the standard z-score for the random variable X equals 239 days. The standard z-score for the…

Q: Suppose that the score on a reading test are normally distributed within a mean of 70 and a standard…

A:

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

A: Introduction: If P4 denotes the 4th percentile, then observations lie below P4 with 4% or 0.04…

Q: In certain distribution of numbers,the mean is 70 with a standard deviation of 3. At least what…

A: Given, Mean μ = 70 Standard deviation σ = 3

Q: A standardized memory test has a mean of μ = 100 and a standard deviation of σ= 10. What percent of…

A: Let X be the score in the memory test which follows normal distribution with mean 100 and standard…

Q: A set of 1100 exam scores is normally distributed with a mean = 78 and standard deviation = 4.How…

A: The students that scored higher than 78 are given by: The students that scored between 74 and 82…

Q: A set of 700 exam scores is normally distributed with a mean = 76 and standard deviation = 6. How…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: The weight of 100 female students aged 15 to 20 years have a mean of 120 pounds and a standard…

A: Solution: Given data: Sample size (n) = 100 Mean = 120 pounds Standard deviation = 6 pounds

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15.    In a sample of 500…

A: The normal distribution: A continuous random variable X is said to follow normal distribution with…

Q: A set of 1500 exam scores is normally distributed with a mean = 74 and standard deviation = 6. How…

A: It is given that the exam scores follow a normal distribution with mean 74 and standard deviation 6.…

Q: The achievement scores for a college examination are normally distributed with mean 75 and standard…

A:

Q: A set of laptop prices are normally distributed with a mean of $750 and a standard deviation of $60.…

A: To Determine: A set of laptop prices are normally distributed with a mean of $750 and a standard…

Q: imagine the average score on an exam is 71 with a standard deviation of 10. If scores are normally…

A: If a random variable x has a distribution with mean µ and standard deviation σ, then the z-score is…

Q: A set of 1200 exam scores is normally distributed with a mean 82 and standard deviation = 10. %3D…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the…

A: As per question we have µ=100 and σ=15 Here, we have to find p(101≤x≤134) To find out probability…