A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1515 and the standard deviation was 316. The test scores of fourstudents selected at random are 1920, 1260, 2260, and 1390. Find the z-scores that correspond to each value and determine whether any of the values are unusualThe Z-score for 1920 is(Round to two decimal places as needed.)The Z-score for 1260 is(Round to two decimal places as needed.)The Z-score for 2260 is.(Round to two decimal places as needed.)NeThe Z-score for 1390 is4(Round to two decimal places as needed.)Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice.OA. The unusual value(s) is/are(Use a comma to separate answers as needed.)OB. None of the values are unusual.=H"' 10√₁ ViI.(1,0)MoreTime Remaining: 00:16:56 Next#Q

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Answered: A standardized exam's scores are…

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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The mean composite score for seniors who took the SAT in 2010 was 1068. If the standard deviation for the same year was 100, what would the z score be for a person who scored in the 98th percentile? a. +2.00 b. -1.00 c. +1.00 d. -2.00
Grace has a dog and its weight is z = -0.5lbs. Her current weight is 47 lbs. The average weight for medium-sized dogs is 50 lbs. What is the standard deviation for a dog of her size?
As reported in Runner's World Magazine, the times of finishers in the New York City 10-km run are normally distributed with a mean of 60 minutes and standard deviation of 7 minutes. What would a runner's finishing time have to be for his/her finishing time to be 1.6 standard deviations above the mean of 60 minutes? You must use the z- score formula and solve for X. Round to the 10ths place.
Please answer B, C, & D.
Use z scores to compare the given values. The tallest living man at one time had a height of 233 cm. The shortest living man at that time had a height of 89.9 cm. Heights of men at that time had a mean of 176.34 cm and a standard deviation of 5.47 cm. Which of these two men had the height that was more extreme? Since the z score for the tallest man is z= height that was more extreme. (Round to two decimal places.) and the z score for the shortest man is z = the man had the
The mean time taken by all participants to run a road race was found to be 155 minutes with a standard deviation of 15 minutes. Using Chebyshev's theorem, find the percentage of runners who ran this road race in 125 to 185 minutes.Round your answer to the nearest integer.Enter your answer in accordance to the question statement %
On a nationwide math test, the mean was 58 and the standard deviation was 4. If Roberto scored 70, what was his z-score? Use the formula Z where is the mean, o is σ the standard deviation, and x is Roberto's score. Round to 4 decimal places. X н =
The GMAC Insurance company reported that the mean score on the National Drivers Test was 77.8 with a standard deviation of 2.5 points. The test scores are approximately bell-shaped. Approximately 68% of all test scores were between two values A and B. What is the value of A? Write only a number as your answer. Round to one decimal place.
Note: The standard deviation is defined as the average distance of the class scores from the mean. Note: The variance is defined as average squared distance of the class scores from the mean. Sameer's score in a quiz was 25 and he was five standard deviations above the mean in this quiz. The mean was 20. The average squared distance of the scores from the mean in this quiz is: Select one: a. -3 b. 2 c. 3 d. -2 e. 1 f. -1
Answer according to Swikness theorm. Thank you • Illustration: The mean and standard deviation of a set of 100 observations were 40 and 5 respectively by a computer which by mistake took the value 50 in worked out as place of 40 for one observation. Find the correct mean and variance.
FInd the Dispersion (Range, Variance, Standard Deviation, Coefficient of Variation - whichever is appropriate to the variable).
Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?

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