The test scores for a very large statistics class have a bell-shaped distribution with a mean of 72 points. If 95% of the scores are between 62 and 82, what is the standard deviation? O = i

Q: The data set has size 60. Approximately how many observations lie within three standard deviations…

A: From the empirical rule

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, The points of final exam follows normal distribution with mean 73 and standard deviation 8.…

Q: Find the 2-score for a raw score of 27 with a mean of 20 and a standard deviation of 5. O-06 O 14 O…

A:

Q: A population data set has a mean of 81 and a standard deviation of 5.2. Find the z-scores for each…

A: Population mean, μ=81 population standard deviation, σ=5.2 The formula of z-score is, z=x-μσ…

Q: Assuming that the scores of the student in a test are normally distributed with the mean of 40 and…

A: Given data mean =40 ,standard deviation =6

Q: for a population with a mean of u=72 and a standard deviation of σ=10, what is the standard error of…

A: Given,mean(μ)=72standard deviation(σ)=10

Q: For a population with the mean of u = 45 and a standard deviation of 10, what's the standard error…

A: Given that, Mean = 45 Standard deviation = 10

Q: Suppose the people living in a city have a mean score of 49 and a standard deviation of 77 on a…

A: Hello there! I see there are more than 3 sub parts in the question. According to our policies can…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given data, Mean = 69 SD = 7

Q: Suppose that the sample dataset of July 1 temperatures consisted of 64 observations and that these…

A: given data standard deviation s = 4 sample size n = 64

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given dataMean = 74Standard Deviation = 9a)The Lowest Score for A grade is given by p-value will be…

Q: For the Reese's pieces scenario, compute the standard deviation of sample taking if the size of the…

A:

Q: A recent study shows that out of 5, 000 people who moved to Arizona, 2, 350 did so to take a new…

A: From the given information, sample size n = 1000. Total number of people moved n(S) = 5000. Number…

Q: A distribution with a mean of μ = 87 and a standard deviation of σ = 12 is transformed into a…

A:

Q: In a certain distribution of​ numbers, the mean is 80 with a standard deviation of 3. At least what…

A:

Q: The grades on a midterm were Normally distributed with a mean of 120 and a standard deviation of 17.…

A: GivenMean(μ)=120standard deviation(σ)=17

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 71…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, final exam score follows normal distribution mean 73 and standard deviation 8. Grades are…

Q: For the Reese's pieces scenario, compute the standard deviation of sample taking if the size of the…

A: Answer - For the Reese's pieces scenario, the size of the samples is n =  200 and the proportion of…

Q: Suppose that the scores on a statewide standardized test have a bell shape distribution with a mean…

A: Given that Mean = 79,s.d=6 (b) P(X>97 )=? (c) P(X<73) =? (d)P(61<x<85) =?

Q: I don't understand how to solve for this. I'm having trouble understanding the percentages

A: Let us define the random variable X as the points for the final exam that are normally distributed…

Q: The results of a calculus exam are normally distributed with a mean of 76 and a standard deviation…

A:

Q: For a population with a standard deviation of  = 20, how large a sample is necessary to have a…

A:

Q: The scores from a state standardized test have a​ bell-shaped distribution with a mean of 100 and a…

A: By using empirical rule we know…

Q: If an entire population with μ = 60 and s = 8 is transformed into z-scores, then the distribution of…

A: Given X~N(μ,σ) population mean μ=60 population standard deviation σ=8 The formula for a…

Q: A data set with roughly a bell-shaped distribution has mean 45 and standard deviation 12.…

A: The percentage of the observations lie between 33 and 57 is obtained below:Let X be an observation…

Q: The final exam scores in a statistics class were normally distributed with a mean of 63 and a…

A: The final exam scores in a statistics class were normally distributed with a mean of 63 and a…

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A: Consider that the sample mean and standard deviation of a random variable x are x̄ and s,…

Q: The variance of a sample of 169 observations equals 576. The standard deviation of the sample equals…

A: given  variance of sample = 576 we know that , sample standard deviation equals square root of…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Finding the lowest score that would qualify a student for an A grade:The points for the final exam…

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 71…

A:

Q: The average grade for an exam is 74, and the standard deviation is 7. If 12% of the class is given…

A: Let the random variable X denote grade score. Then, X~Nμ, σ2 with μ=74 and σ=7. Let α be the lowest…

Q: The sum of deviation scores in any distribution (population or sample) is always equal to 0.…

A: Let us take an example.   Let X be random variable    we know that Meanx¯=∑xn Therefore, ∑x=nx¯

Q: In a large section of a statistics class, the points for the final exam are normally distributed,…

A:

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: The mean incubation time 69 and standard deviation 18 The cutoff for A is calculated as follows:…

Q: The data set has size 90. Approximately how many observations lie within two standard deviations…

A: The Empirical Rule states that 99.7% of data observed following a normal distribution lies within 3…

Q: For a sample of 120 businesses, the average profit they generate in a month is $54,000 with a…

A:

Q: Given that the mean weight of senior high school students is 65kg with a standard deviation of 10.…

A: Given information Population mean µ = 65 kg Standard deviation σ = 10 We have to determine the…

Q: The data set has size 40. Approximately how many observations lie within two standard deviations to…

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: MCAT scores are normally distributed with a mean of ? ​​= 501.5 and a standard deviation of ? =…

A: Given: Population mean μ = 501.5 Population standard deviation σ = 10.7 Formula Used: Z-score = X-μσ

Q: The scores on a psychology exam were normally distributed with a mean of 59 and a standard…

A: Mean = 59 Standard deviation = 10 The formula for z is: z=x-μσ

Q: The results of a calculus exam are normally distributed with a mean of 76 and a standard deviation…

A:

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given Information :  In a large section of a statistics​ class, the points for the final exam are…

Q: Multiple questions

A: Given dataMean = 71Standard Deviation = 8a)The Lowest Score for A grade is given by p-value will be…

Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: From the given information,   Mean = 100 Standard deviation = 15   The objective is to find the…

Q: The data set has size 80. Approximately how many observations lie within two standard deviations to…

A: Empirical rule: On a normal distribution about 68% of data will be within one standard deviation of…

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 69…

A: Let X denote the scores on a statewide standardized test and it follows normal distribution with…

Q: The variance in a data set is 427. Find the standard deviation. Round to two decimals.

A: The random variable is X. It is given that the variance is 427. We have to find the standard…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, Mean = 71 SD = 8