A grading scale is set up for 1000 students test scores. It is assumed that the scores are normally distributed with a mean score of 75 and a standard deviation of 15. What is the probability a student will have a score between 45 and 75

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Q: 95% of 80 freshman history students scored between 70% and 80% on a take home quiz. If this data is…

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A: Given,mean(μ)=87standard deviation(σ)=12

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A: Z = x-μσ~N(0,1)

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Q: A Harris poll claims that each person in the US will spend an average of $92.12 on Halloween this…

A: Given :  A Harris poll claims that each person in the US will spend an average of $92.12 on…

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Q: the time it takes a student to complete the statistics exam follows a normal distribution with a…

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Q: The spending at Target is distributed normally with a mean spending of $45.67 and a standard…

A: According to the provided information, mean = $45.67  standard deviation = $5.50

Q: What is the Mean deviation of the numbers 0.5, 0.8, 1.1, 0.9 and 0.6

A: The data is given by 0.5, 0.8, 1.1, 0.9, 0.6 And the mean of these numbers is Mean = (0.5 + 0.8 +…

Q: According to the Nielsen Company, the mean number of TV sets in a U.S. household in 2013 was 2.24…

A: Mean = 2.24 Standard deviation = 1.3 Sample size = 95

Q: A banks loan officer rates application for credit. The ratings are normally distributed with a mean…

A:

Q: Assume that the traffic to the web site of Smiley’s People, Inc., which sells customized T-shirts,…

A: Givenmean(μ) = 4.44 millionsstandard deviation(σ) = 720000 = 0.72 millions

Q: Assume that IQ scores are normally distributed, with a mean of 100 points and a standard deviation…

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Q: According to government data, the probability that a woman between the ages of 25 and 29 was never…

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A: The mean is 28 and the standard deviation is 4.

Q: If the normal operating life of a car is considered to be 150,000 miles, with a standard deviation…

A: The probability that a car will last 200,000 miles is calculated as follows:

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Q: Assume that the height of people, measured in inches, has a normal distribution with a mean of 65…

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Q: Suppose that family incomes ina town are normally distributed with a mean of $1,200 and a standard…

A: Mean = 1200 Standard deviation = 600

Q: The grades of a statistics midterm are normally distributed with a mean of 79 and a standard…

A: Normal distributionμ=79σ=3.5pgrade between74 and 80=?

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A: The probability is equal to the area under the curve of normal distribution. So the probability that…

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A: Let "X" be the grades of final examination. Use excel formula "=NORM.S.DIST(1.5714, TRUE)" to…

Q: The final score for a mathematics exam is normally distributed, with an average score (µ) of 57 and…

A: GivenMean(μ)=57standard deviation(σ)=9.25

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Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

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A: Given that : mean (µ) = 100 standard deviation (σ) = 15.

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Q: If a gambler places a bet on the number 7 in​ roulette, he or she has a​ 1/38 probability of…

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Q: A set of final examination grades in an introductory statistics course is normally​ distributed,…

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Q: The grades in a standardized test have a mean of 78, a known standard deviation of 8, and are…

A: Given:

Q: A set of final examination grades in an introductory statistics course is normally​ distributed,…

A: Here, µ = 72, σ = 9.

Q: The final exam scores in a Mathematics class were normally distributed with a mean of 75 and a…

A: As per our guidelines we are suppose to answer only one question. Given,mean(μ)=75standard…

Q: According to government data, the probability that a woman between the ages of 25 and 29 was never…

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Q: A set of scores in Statistics examination is approximately normally distributed with a mean of 74…

A: Given: The value of mean is, μ=74. The value of standard deviation is, σ=7.9. The objective is to…

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

A: Comments: Hi! Thank you for the question, As per the honor code, we are allowed to answer one…

Q: Assume that IQ scores are normally distributed, with a mean of 100 points and a standard deviation…

A:

Q: Find the indicated probability. An insurance company has determined that the cost of a certain…

A: Given information Mean µ = $800 Standard deviation σ = $40

Q: The heights of 18 year old men are normally distributed with a mean of 67 inches and a standard…

A: Given distribution is normally distributed with mean 67 and standard deviation 3 x~N(μ=67, σ=3)

Q: 3. If the probability of a defective bolt is 0.1, find (a) the mean, (b) the standard deviation, for…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.