B. Solve each problem and construct a normal curve.1. Your monthly electric bill has a mean of P1,500.00 and a standard deviation of P120.00. What isthe percentage that you will pay an amount between P1,380 and P1,740?2. Suppose the scores in the Mathematics exam are normally distributed. If the exam has a meanscore of 25 and a standard deviation of 5, what is the probability that if you take the exam you willget a score higher than 30 points?

Answered: Image /qna-images/answer/e6124eef-c70e-4103-8eb2-1de29d0f6db9.jpg

Answered: B. Solve each problem and construct a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Similar questions

Changing the mean and standard deviation of a Normal distribution by a moderate amount can greatly change the percent of observations in the tails. Suppose that a college is looking for applicants with SAT math scores 750 and above. In 2007, the scores of men on the math SAT followed the N(533, 116) distribution. What percent of men scored 750 or better? Round to the nearest hundredth and do not include the % symbol in your answer.
The scores on an exam were normally distributed with a mean of 75 and a standard deviation of 8. There were 320 students that took the test.
Please answer the attached question. Thank you.
The scores on a psychology exam were normally distributed with a mean of 71 and a standard deviation of 8. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was nothing. (Simplify your answer.)
Assume that women have heights that are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. The middle 50% of the heights are between what two values? Round to one decimal place. 60.3 inches and 66.9 inches 61.9 inches and 65.3 inches 62.3 inches and 64.9 inches 63.1 inches and 64.1 inches
solve c
Suppose that the mean weight for men 18 to 24 years old is 170 pounds, and the standard deviation is 20 pounds. In each part, find the value of the standardized score (z-score) for the given weight. USE SALT (a) 206 pounds. Z = (b) 140 pounds. Z = (c) 173 pounds. Z = (d) 236 pounds. Z =
The weights for new born babies is approximately normally distributed with the mean of 5.4 pounds and a standard deviation of 1.1 pounds. Use the cumulative Z-Score table to answer the questions below. Write your answers rounded to the nearest whole number. Consider a group of 2,000 new born babies 3. How many would you expect to weigh more than 4.41 pounds? 4. How many would you expect to weigh between 5.4 and 5.95 pounds?
You are told that the grades on a standardized statistics test are normally distributed with a mean of 79 and a standard deviation of 5.What is the relative score (ie, z score) of someone with a grade of 91? a. 2.40 b. none of these c. 2.30 d. 2.58 e. 1.20
Nathan takes the State Aptitude Assessment, which has a mean of 350 and a standard deviation of 50. His brother Kyle takes the Regional Readiness Test, which has a mean of 300 and a standard deviation of 45. If Kyle's score was 375, what is the cooresponding z score? a. +2.22 b. +1.00 c. +1.67 d. -1.67
Children between the ages of 2 and 5 watch an average of 25 hours of television per week. Assume the variable is normally distributed and the standard deviation is 3 hours. If 20 children between the ages of 2 and 5 are randomly selected, find the probability that the mean of the number of hours they watch television will be greater than 26.3 hours. Round your answer to 4 decimal places.
Many college admissions want to know your class percentage in addition to your grades. The grades are normally distributed. A certain university insists that a student place in at the 90th percentile. if the mean is 79.45 and the standard deviation is 5.37, what is the 90th percentile? a.88.07 b.85.01 c.86.33 d.90

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