An insurance company crashed four cars in succession at 5 miles per hour. The cost of repair for each of the four crashes was $411, $456, $400, $231. Compute the range, sample variance,and sample standard deviation cost of repair.The range is $s² = dollars²(Round to the nearest whole number as needed.)S=$(Round to two decimal places as needed.) Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 14. Use the empirical rule to determine the following.(a) What percentage of people has an IQ score between 72 and 128?(b) What percentage of people has an IQ score less than 86 or greater than 114?(c) What percentage of people has an IQ score greater than 114?(a) % (Type an integer or a decimal.)(b) % (Type an integer or a decimal.)(c)% (Type an integer or a decimal.)

The range is the difference between the maximum and minimum values in the sample: Range = $456 -…

Answered: Scores of an IQ test have a bell-shaped…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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I Professor Brown administered an achievement test, which as he remembers from years of experience, yielded a population mean score of 85. If his class of 25 students obtained a mean score of 89 with standard deviation score of 14, can the professor claim that his class is a superior class? Assume that the mean score is approximately normally distributed. Use a = 0.01
Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 570 and a standard deviation of 94. Use the 68-95-99.7 Rule to find the percentage of people taking the test who score between 476 and 570. The percentage of people taking the test who score between 476 and 570 is %.
What is the value of SS (sum of squared deviations) for the following set of scores? If the scores constitute a population, what is the population standard deviation, s? Scores: 1, 1, 4, 0.
The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell-shaped distribution. This distribution has a mean of 44 and a standard deviation of 11. Using the empirical rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 22 and 55?Do not enter the percent symbol.ans = ___________ %
The distribution of heights in a population of women is approximately normal. Sixteen percent of the women have heights less than 62 inches. About 97.5% of the women have heights less than 71 inches. Use the empirical rule to estimate the mean and standard deviation of the heights in this population. Mean: K inches Standard Deviation: inches
The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 20. What is the probability we could select a sample of 80 adults and find the mean of this sample is less than 95? 0.0125 0.9750 0.4875 0.9476
26)
What is the z-score of x = 3 if it is 2 standard deviation to the left of the mean? -3 -2 1 O 2 1.
Scores on the Wechsler Adult Intelligence Scale for the 2020 to 3434 age group are approximately Normally distributed with a mean of 110 and a standard deviation of 15. How high must a person score to be in the top 5%5% of all scores? Enter your answer as a whole number.
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 72 and a standard deviation of 8. Use the T1-84 PLUS calculator to answer the following. Round the answers to at least two decimals. (a) Find the 32nd percentile of the scores.. (b) Find the 67 percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 8% of the class. What is the miniìmum score needed to get an A? (d) Between what two values are the middle 70% of the scores? (Enter the smaller number in the first box.)
This list of test scores has a mean of 50. Estimate whether the standard deviation is closest to 0, 1, 2 or 10. (This problem requires NO arithmetic - instead, I'm looking at your intuition about standard deviation) 12, 25, 14, 17, 12, 13, 12 (a) 0 (b) 1 (c) 2 (d) 10
The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 20. What is the probability we could select a sample of 20 adults and find the mean of this sample is less than 95? 0.1314 0.7372 0.3686 0.7098

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