Based on the graph of this normal distribution, a. The mean is b. The standard deviation is c. 68% of the data values are between and d. 95% of the data values are between and e. 99.7% of the data values are between and

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…

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

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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: In a normal distribution, 99.7% of the data fall within how many standard deviations of the mean? A.…

A: Solution-: In a normal distribution, 99.7% of the data fall within how many standard deviations of…

Q: . A distribution has a coefficient of variation of 65% and mean of 47. What is the value of the…

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Q: Last year the revenue for utility companies had a mean of $60 million with a standard deviation of…

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: a. the range b. the variance c. the standard deviation

A: The given frequency distribution is Class interval Frequency (f) Mid value (x) fx fx2 7-9 2 8…

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: 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: 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: 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 successful basket ball player has a height of 6 feet 4 inches. Based on statistics his height…

A: As given, The basketball player has a height of 6 feet 4 inches and when his height is converted to…

Q: A distribution of data has a mean of 26 and a standard deviation of 2. How many standard deviations…

A: Population mean μ =26 Population standard deviation =2

Q: The mean composite score for seniors who took the SAT in 2010 was 1068. If the standard deviation…

A: From the provided information, Mean (µ) = 1068 Standard deviation (σ) = 100

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: The standard deviation of a data set is zero. This means that a. All the values are equal to zero b.…

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

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Q: If a student scored 77 points on a test where the mean score was 84.5 and the standard deviation was…

A: Solution: Let X be the score of a student. From the given information, X has a mean µ=84.5 and a…

Q: From the data below, find the a. mean b. median c.mode

A: We want to find mean,median and…

Q: find the z score that corresponds to P35, P65, P20, P55, P67, and P25. Draw the normal curve and…

A: The question is about Std. normal distribution Introduction : 1 ) z is a std. normal r.v which…

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: Which of the following data sets has the smallest standard deviation? a. 1, 2, 3, 4, 5 b.…

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Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 65…

A: Given information- Mean, μ = 65 Standard deviation, σ = 4 a) The percentage of scores that were…

Q: Suppose that vehicle speeds at an interstate location have a normal distribution with a mean equal…

A: The random variable vehicle speed follows normal distribution. The population mean is 70. The…

Q: The table below represents a frequency distribution of the heights in centimeters of all 50 members…

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

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: Given that,The bone density test scores are normally distributed.The mean  is 0.The standard…

Q: d the mean and standard deviation of the number of red-headed Scots in a randomly selected group of…

A: Let X be the random variable from binomial distribution with probability of  red hair for Scottish…

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: Draw a vertical line through a normal distribution for each of the following z-score locations. Find…

A: a)  z = 1.80

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: 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:…