Suppose the mean grade for a statistic midterm was 7.5 with Standard Deviation of 10.  Assume that the grades are normally distributed.   a) What perventage of students received at least a 90? b) What perentage of students reveived an 84? c) What percentage of students received a grade

Q: Assume that scores on a trivia challenge test were distributed normally, with an average score of 70…

A: Given data, μ=70σ=6

Q: The height of men is a normally distributed variable with a mean of 68 inches and a standard…

A: The mean is 68 and the standard deviation is 3.

Q: 1. Here is a sample of ten grades on a Math exam: 71, 73, 77, 85, 86, 88, 88, 93, 94, 95. Find the…

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Q: Q1. For the giving dataset (X) below, calculate the following X= (655.2, 576.7, 554.7, 509.1, 567.5,…

A: Given data set isx={655.2,576.7,554.7,509.1,567.5,428.3,560.2,438.4,328.3,655.2}

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

A: Normal Distribution: The normal distribution has a bell-shaped curve which is symmetric in nature. μ…

Q: Assume the population mean (µ) is 8 seconds with a standard deviation (σ) of 2 seconds. a) How far…

A: The mean is 8 seconds and the standard deviation nis 2 seconds.

Q: The speed limit of a road is 65 miles per hour. The speed of a car on the highway follows a normal…

A: Note: Hi there! Thank you for posting the question. Unfortunately some portion of the question seems…

Q: Exam scores in a MATH 1030 class is approximately normally distributed with mean 90 and standard…

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Q: A normal distribution of scores has a standard deviation of 10. Find the z - scores corresponding to…

A: a)Suppose the variable of interest is x.The standard deviation is .It is needed to find the z score…

Q: 9. The monthly income of 5,000 workers at the Microsoft plant are distributed normally. Suppose the…

A: P(X<a)=0.977 a=?  Mean=μ=1250, standard deviations σ=250

Q: Assume that the mean monthly pay for an organization is $1500 and the standard deviation is $300.…

A: Mean will be increased by $200 then the new mean will be $1700

Q: In a job fair, 5,000 applicants applied for a job. Their mean age was found to be 28 with a standard…

A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Q: An entrance examination is to be conducted to 1500 incoming freshmen students at Gordon College…

A: Followings are the Explanation of the question Let X be the freshmen students at GordonCollege which…

Q: The weight of seven men working as a shopping mall Santa Claus during the Christmas holiday is as…

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Q: Suppose that 100,000 recent grads have starting salaries which are normally distributed with a mean…

A: Given that  μ=120,000σ=20,000 b) Consider the probability that the salary above $131,200 is,…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Let, X=the distance of fly balls hit to the outfield (in baseball) Given that X is normally…

Q: he mean yearly rainfall in Sydney, Australia, is about 137 mm and the standard deviation is about 69…

A: Mean Standard deviation Yearly rainfall is normally distributed.

Q: On the final examination in Engineering Data Analysis, the mean was 72 and the standard deviation…

A: As per guideline expert have to answer first question three subparts only dear student please upload…

Q: In the United States, males between the ages of 40 and 49 eat on average 103.1 g of fat every day…

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Q: An Annual Achievement Test was administered to third graders. The test has a mean score of 100 and…

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Q: The annual rainfall in a certain region is approximately normally distributed with mean = 41.3…

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Q: A group of 500 volunteers recorded an average age of 21.5 years and standard deviation of 9.6 years.…

A: SOLUTION: EXPLAINATION: From the question N=500 a)mean =21.5 and standard deviation =9.6…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

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Q: Iniversity and college students average 7.2 hours of sleep per night, with a standard eviation of 40…

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Q: A set of data item is normally distributed with a mean 208 and a standard deviation of 48. Find the…

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Q: Q1. For the giving dataset (X) below, calculate the following X= (655.2, 576.7, 554.7, 509.1, 567.5,…

A:

Q: The mean weight of a baby hamsters is 8 ounces with a standard deviation of 2 ounces. Use the…

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Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: 95% of students at school scored between 60% and 80% on a test. Data is normally distributed,   1)…

A: Given 95% of students at school scored between 60% and 80% on a test and this data is normally…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: GivenMean =253Standard deviation =45 a)Let X be distribution of distance of fly balls hit to…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: Suppose that 100,000 recent grads have starting salaries which are normally distributed with a mean…

A: (d) Obtain the number of recent grads earns above $95,000. The number of recent grads earns above…

Q: The height of men is a normally distributed variable with a mean of 68 inches and a standard…

A: Mean(μ)=68standard deviation(σ)=3