A test has a mean score of 55 with a standard deviation of 12. Using the Empirical Rule determine the range of the scores for the:   A. Middle 68% of the population.   B.Middle 95% iof the population. Explain.

Q: Which of the following are measures on positions of a data set? 1. the third qurtile 2. the median…

A: The third quartile, the median and the maximum measures the positions of a data set.

Q: The number of goals scored by a college soccer team for a given season are 4, 9, 0, 1, 3, 12, 3, 7,…

A: The population mean is, μ=∑xN=4+9+0+1+3+12+3+7+4+5+8+212=5812=4.8333 The population mean is 4.8333.

Q: The lowest and the highest data value of a data set are 12 and 28 respectively, then the approximate…

A:

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: A successful basketball player height is 203 cm. His converts to the z score of 4.10. How many…

A: Consider, X = 203  z-score = 4.10 z-score is a numerical value that tells the number of standard…

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…

Q: he senior class has been given a comprehensive examination to assess educational experience. The…

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

Q: Angela polled her first grade class about their family pets. The following data lists the number of…

A:

Q: Tom scored a 125 on a measure of math ability and a 42 on a measure of verbal ability.The means and…

A:

Q: are in the 72nd percentile on an exam. The mean was 77 and the standard deviation was 7. What was…

A: From the given information we find the score.

Q: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

A:

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: 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: Given a set of scores below, write down the scores one, two, and three standard deviations above the…

A:

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: 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: H=34, o=4.5, the score is 2.5 standard deviations above the mean

A: Suppose the variable of interest is x.The mean is and the standard deviation is .

Q: a. Which test do we use? b. Using this test, decide if there is a difference between the two groups.

A: x = 81.9 y = 86.1 s1 = 9.8 s2 = 10.3 n1 = 64 n2 = 175

Q: Consider the data:  10, 7, 9, 13, 11, 13, 14.  (Show your work.) a)Determine the mean.…

A:

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: Find the standard score and the percentile for a data value 0.6 standard deviations above the mean.…

A: As per the question we have In standard normal distribution Mean µ = 0 Standard deviation σ = 1 0.6…

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

A:

Q: In the first two months of a recent year, 95 vehicle occupants were killed by air bags. Sixty-three…

A: The value of n is 95. The value of α is 0.05. The value of x is 63. Here p0 is the proportion of…

Q: The mean of an examination is 69, the median is 68, the mode is 67, and the standard devi. 3. The…

A: Given data, Mean=69 Median=68 Mode=67 Standard deviation=3   Variation Coefficient=?

Q: Determine the class average if the standard deviation was 8% and Henry’s mark of 85% is equivalent…

A: Given that,  The standard deviation =8%, Marks of Henry's =85%, and z-score =1.30.

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 height of Americans in 1776 was 67 inches with a standard deviation of 3 inches.  George…

A: Given,mean(μ)=67 inchesStandard deviation(σ)=3 inches   Empirical rules:1) P(μ-σ<X<μ+σ)=68%2)…

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: Tom scored a 115 on a measure of math ability and a 40 on a measure of verbal ability. The means and…

A: For mathabilitygiven,Mean(M)=95Standard deviation(S)=15Tom…

Q: Which is not a measure of dispersion? a. Mean b. Standard deviation c. Variance d. Range

A: Explanation: The measure of dispersion is as follows: Standard deviation Variance Range…

Q: Ten year old girls, the Mean is 54.4, the standard deviation 2.7, 95 percentile in height. How tall…

A: Let  be the height of ten year old girl.The mean: The standard deviation:

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: