Scores on a statistics final in a large class were normally distributed with a mean of 73 and a standard deviation of 6. Use the empirical rule to answer the following questions. a. Estimate the proportion of the scores less than 67. b. Estimate the proportion of the scores more than 85. c. Estimate the proportion of the scores between 61 and 79.

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A: Given,           Z -score=4.45           A basket ball player has a height of  6 feet 9…

Q: Suppose that the exam scores of a statistics class were normally distributed with a mean of 94 and…

A: Solution: Let X be the exam score of a statistics class. From the given information, X follows…

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A:

Q: 1.Find the mean and standard deviation for the data

A: Given: No. of batteries, n=10 Time (x) 397 355 415 395 352 436 327 417 276…

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

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A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

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A:

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A: Given data You want to know the percentage of utility companies that earned revenue less than…

Q: 500 freshmen at Prairieville High School took an algebra test.  The scores were normally distributed…

A: According to the Bartleby guidelines experts solve only one question and maximum three subparts…

Q: 20. For the data in the following sample: 10, 6, 8, 6, a. Find the mean and the standard deviation.…

A: 20. a. The mean of the sample is, x¯=∑ixin=10+6+8+6+55=355=7 Thus, the mean of the sample is 7. The…

Q: A statistician was exploring a set of data representing a group of 121 women.  The mean was 49 and…

A: Sample size, n = 121 Mean = 49 Variance σ2 = 9 We have to find the standard deviation.

Q: In an  administration to 2000 student the average score is 65 and the standard deviation is 25.…

A: Given in an administration to 2000 student the average score is 65 and the standard deviation is 25.…

Q: The average number of days absent per student per year at West Valley School is 17 days with a…

A: mean = μ = 17standard deviation = σ = 4

Q: 11. Which of the following statements is the most accurate description for the concept of standard…

A: Basics: Standard Deviation: Standard deviation is defined  as a measure of the dispersion of a set…

Q: Find the deviations from the mean for the set of data: 26, 29, 22, 24, 24. Score 26 29 22 24 24…

A: Given Data is, 26,29,22,24,24 mean,x¯ =26+29+22+24+245=25

Q: iv. Find the average height of the club members. v. Calculate the standard deviation for the…

A: For the given data , We have to calculate average and standard deviation.

Q: In an IT Certification Examination, the mean was 75 and the standard deviation was 5. If Pam z…

A: Let X be the examination score from normal distribution with mean (μ) = 75, standard deviation (σ) =…

Q: Suppose that the mean weight for men 18 to 24 years old is 170 pounds, and the standard deviation is…

A: The objective of this question is to calculate the z-score for each given weight. The z-score is a…

Q: Assume that the heights of 400 basketball players are normally distributed with a mean of 175 cm and…

A: 3.  Assume that the heights of 400 basketball players are normally distributed with a mean of 175 cm…

Q: z-scores to make the following comparison between students. a. Claudia has a score of 61. Her class…

A: Given: For Claudia Raw score = 61 Population mean μ1=74     Population standard deviation σ1=4…

Q: In normally distributed data, what percent of the data lies on the interval 2 standard deviations…

A:

Q: The mean of a set of data is 4.68 and its standard deviation is 2.83. Find the z score for a value…

A: Reviewing information, Given, μ=mean=4.68σ=standard deviation=2.83x=9.38

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:…

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A: Given data: Height (cm) Frequency (f) 160≤x<170 12 170≤x<180 11 180≤x<190 6…

Q: A large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. c.…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 8 Let X be a random variable…

Q: A successful basketball player has a height of 6 feet 11 ​inches, or 211 cm. Based on statistics…

A:

Q: A successful basketball player has a height of 6 feet 3 ​inches, or 191 cm. Based on statistics from…

A: Given,a basketball player has a height of 6 feet 3 inchesand the Z-score =2.31

Q: A successful basketball player has a height of 6 feet 4 ​inches, or 193 cm. Based on statistics from…

A:

Q: For the following data in the sample:     0,    6,    8,    6,    5 Find the mean and the standard…

A: The data is given as 0, 6, 8, 6, 5.

Q: A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form…

A:

Q: tain population, the mean score on a test is 420.  The standard deviation is 105. If the…

A: a. The z score can be calculated as: z=X-uσ=385-420105=-0.333 b. The z score can be calculated as:…