Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 2 inches. The heights of 7 randomly selected students are 75, 60, 74, 71, 67, 73 and 64.? Margin of error confidence at 90%______?

Q: ample of 3000 persons were surveyed for their walght in pounds, the mean weight is 135 lbs with a…

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Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 95 percent of…

A: Given data:  average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 95 % of all…

Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The…

A: Given that  Sample size n =9 Population standard deviation =3

Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 68 percent of…

A: Given data: If average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 68% of…

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A: Standard deviation of sample is given by

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Q: A student scored 51 on a math achievement test for which the mean was 36 and the standard deviation…

A: From given data we have  Mean = 36 standard deviation = 6 X=51

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Q: 5 students were given a test. The average and standard deviation of the 5 scores were found to be…

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Q: Suppose a variable is normally distributed. What percentage of scores fall between one standard…

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Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The…

A: Let "X" be the heights of students. X 67 74 70 70 65 62 60 68

Q: onsider this data set { 9, 3, 8, 8, 9, 8, 9, 18}. Find the standard deviation, s. Round off your…

A: given data, 9,3,8,8,9,8,9,18we have to find out the standard deviation(s) for the given data. x…

Q: The IQ score that separates the bottom 15% from the top 85% is P,5 =. (Round to the nearest…

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Q: A population has mean 27 and standard deviation 12 . What is the data value that has a z-score of -2…

A: Given data, Mean=27 sd=12 z=-2 x=?

Q: Assume that adults have IQ scores that are normally distributed with a mean of 105   and a standard…

A: It is given that the mean and standard deviation are 105 and 15, respectively.

Q: 5. 2.1, 4.6, 8.2, 3.4, 5.6, 8.0, 9.4, 12.2, 56.1, 78.2

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

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

Q: Suppose you received a score of 95 out of 100on exam 11 . The mean was 79and the standard deviation…

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Q: Use the data 2, 3, 3, 6, 6, 7. Add 3 to each of the numbers. How does this affect the mean? How does…

A: Answer;- Given data  2, 3, 3, 6, 6, 7               Add 3 to each of the numbers.               How…

Q: The standard deviation of the given the data {14, 13, 16, 9, 3} is +

A: As per our guidelines we are suppose to answer only o ne question1)Given data set14,13,16,9,3sample…

Q: Two teachers recorded test scores of a small group of students. What is the approximate difference…

A: From the provided information, Bowman group score: 69, 73, 79, 83, 93, 97, 98, 100 Gray group score:…

Q: The mean value for the given data set is equal to 1.0. {-4. -2, 3. 8, . 3.-1, 4) You are required…

A: The given data is: -4, -2, 3, 8, ... , 3, -1, 4 Let the missing number be: x (1). Therefore the mean…

Q: On a standardized test, Sara had a score of 93, which was exactly 2 standard deviations above the…

A: The normal distribution in the center is generally denser and basically less dense at tails. There…

Q: Find the mean and standard deviation of the original set of data.

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Q: The standard deviation of SAT scores is 100 points. A researcher decides to take a sample of 500…

A: Given that SD = 100 Sample size n = 500

Q: In a study 10 people were given a test. The mean test score was 78.9 points. The standard deviation…

A: Given: Sample size n = 10 Sample mean X = 78.9 Sample standard deviation s = 5.2 Formula Used: X =…

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

A: Let X: the length of trout caught in Pyramid LakeGiven that,Mean length(μ) = 19 inches.Sample…

Q: there are 75 students in the class and 20 students are getting a+ grade in the class find the mean…

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Q: Suppose a class average on a test is 75 and the standard deviation is 10. if joe scores 80 on the…

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