I1. Solve the protlem caretully. sketch the curve.1. The daily income of bank audition in 555 Commercial Eank is normally distributed with a mean ef Pho 675 and a standard deviation et Php 45. What is the: value for the income of a bank auditor who earns Pho 700 daily?2. Johnny scored 72 in a quiz in Algebra for which the average score of the class was 65 with a standard deviation of B. He aho took a quie in Statistics and scored 60 for which the average score of the class was 45, and the standand deviation was 12 Retative to other students in the class. did Johnny do better inAlgebra er Statistics?

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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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2. A statistic test has a mean of 78 and a standard deviation of 6. a) What is the z-score of a student who scored 89 on the test? b) What is the z-score of a student who scored 64 on the test? c) What is the z-score of a student who scored 78 on the test? d) What is the score of a student whose z-score is 1.24? e) What is the score of a student whose z-score is -.31? f) What is the score of a student whose z-score is -1? 3. For males in a certain towWn, the systolic blood pressure is normally distributed with a mean of 135 and a standard deviation of 8. a) What is the probability that a randomly selected male's systolic blood pressure will be greater than 143? b) What is the probability that a randomly selected male's systolic blood pressure will be less than 119?
Suppose the mean grade for a statistic midterm was 7.5 with Standard Deviation of 10. Assume that the grades are normally distributed. a) What perventage of students received at least a 90? b) What perentage of students reveived an 84? c) What percentage of students received a grade between 60 and 79?
Suppose that quiz scores in a beginning statistic class have a mean of 7.9 with a standard deviation of 0.5 using chenyshev's theorem what is the minimum percentage of quiz scores between 6.9 and 8.9 ? Round to one decimal place
An advertising executive wants to estimate the mean amount of time that consumers spend with digital media daily. From past studies, the standard deviation is estimated as 47 minutes What sample size is needed if the executive wants to be 90% confident of being correct to within +7 minutes? n=Round up to the nearest integer.)
Scores on the wechsler adult intelligence scale for the 20-to-34 age group are approximately normally distributed with a mean of 110 and a standard deviation of 25 1.) sketch a picture of the distribution and label the scale 2.) Between what two scores do the middle 95% of all people between the ages of 20 and 34 fall within 3.) How high must a person score to be in the top 15% of all scores
The reading speed of sixth grade students is approximately normal with a mean speed of 115 word per minutes and a standard deviation of 19 words per minute?a) What is the reading speed of a sixth grader whose reading speed is at the 75th percentile?
Assuming that the height of a college women are nobody distributed with mean 65 in and standard deviation 3 in what percent of women are taller than 62 in?
An audio/video equipment discount store has 36 salespeople. Daily dollar sales for individual sellers enployed by the store has a normal distribution with a mean of $2000 and a standard deviation of $300. The store's management is going to implement an incentive program awarding a daily bonus to any salesperson who achieves daily sales over $2150. To four decimal places what is the probablitiy that an individual salesperson will earn a bonus on any given day?
Suppose that we have a set of 1000 values with average 4, and standard deviation 3. (This is population data). a) The sum of the values of this set is b) The sum of squares of deviations from the average of the values is c) The sum of squares of the values is d) If the data has an empirical histogram, 7 is approximately the integer as the answer). th percentile (Give an The 97.5th percentile is approximately (Give an integer as the answer). e) If the histogram of the data is unknown, the (100 * ) th percentile is at most

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