QuestionSalaries of engineers are assumed to be normally distributed, with population mean of24000$ and population standard deviation of 3500$. Then 5.94% of engineers' salariesexceed:18540 $O None of these29460 $30125 $

Given data: Mean = 24000 Population standard deviation = 3500

Answered: Question Salaries of engineers are…

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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QUESTION 2 The monthly expenditures on grocery shopping for all households in a town has a mean of $400 and a standard deviation of 75. The distribution of these monthly expenditures is symmetric and bell-shaped. What percentage of households had a monthly expenditure of between $250 and $400 on groceries in this town? O 68% O 34% O 959% O 47.5%
Question 1 Suppose a waitress keeps track of her tips, as a percentage of the bill, for a random sample of 60 tables. Suppose that, unknown to the waitress, her population mean tip percentage is 14%, with a standard deviation of 3%. c. Describe the sampling distribution of her sample mean tip percentage. Round to 3 decimal places, when necessary. The sampling distribution has a mean of ___% and a standard deviation of ___% Answer for blank # 1: 14 Answer for blank # 2: 0.387 d. Between what two values is there a 68% chance that her sample mean tip percentage will fall? Enter your answers in increasing order, rounded to two decimal places. There is a 68% chance that her sample mean tip percentage will fall between ___% and ___% Answer for blank # 1: Answer for blank # 2
Question 2 The population average of a college test score of students is 100 with a standard deviation of 25. For 16 students what is the probability that the mean will be less than 75?
Question 3
QUESTION 19 The monthly expenditures on grocery shopping for all households in a town has a mean of $300 and a standard deviation of 50. The distribution of these monthly expenditures is symmetric and bell-shaped. What percentage of households had a monthly expenditure of between $200 and $350 on groceries in this town? O 68% O 47.50% O 34.50% O 81.50%
Question 2 1 pts Decide if each of the following statement is True or False. If all the scores in a data set are the same, the Standard Deviation is equal to 1.00. O True O False
Question 9 1 pts A data set of class exams is approximately normally distributed with mean 75 and standard deviation 5. Find the range where 95% of students scored. O [65, 85] O [70, 80] O [60, 90]
QUESTION 6 The amount of time for an oil change at a particular service station is normally distributed with a mean of 23.2 minutes and a standard deviation of 3.8 minutes. Find each value below. Round all answers to two decimal places. Type the number only; do not include units. What length of time separates the top 3% of oil change durations at this station? minutes What length of time separates the bottom 15% of oil change durations at this station? minutes What are the two lengths of time that have, between them, the middle 90% of oil change durations at this station? (You will find two values, a lower endpoint and an upper endpoint. Between these values is the middle 90% of observations for this distribution.) Lower endpoint: Upper endpoint: minutes minutes
Question 15: you are considering taking two professors for a statistics course. both professors have an average of 65%. The first professor has a Standard deviation of 1%. The second professor has a standard deviation of 15%. Which professor do you have a better chance of passing with?
Question 1 The population average of a college test score of students is 50 with a standard deviation of 10. For 10 students what is the probability that the mean will be greater than 60?
Question 5 A particular fruit's weights are normally distributed, with a mean of 744 grams and a standard deviation of 14 grams. If you pick 16 fruits at random, then 20% of the time, their mean weight will be greater than how many grams? Give your answer to the nearest gram.

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Question Salaries of engineers are assumed to be normally distributed, with population mean of 24000$ and population standard deviation of 3500$. Then 5.94% of engineers' salaries exceed: 18540 $ O None of these 29460 $ 30125 $