Teachers' Salaries in Connecticut The average teacher's salary inConnecticut (ranked first among states) is s$57,337. Suppose that the distributionof salaries is normal with a standard deviation of $7500. Round intermediate :value calculations to two decimal places and the final answers to at least fourdecimal places.Part: 0/ 2Part 1 of 2(a) What is the probability that a randomly selected teacher makes less than$46,100 per year?P(X<46,100) =

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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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QS- Entry to a certain University is determined by a national test. The scores on this test are normally distributed with a mean of 500 and a standard deviation of 100. Tom wants to be admitted to this university and he knows that he must score better than at least 70% of the students who took the test Tom takes the test and scores 585. Will he be admitted to this university? b-80.23% No a 80.23% Yes 72.4% Yes Q6- A company has 10 software engineers and fo 4 enginoore ha far 0.567 d-0.675 brity of races. e-0.776 are
Coffee: The National Coffee Association reported that 65% of U.S. adults drink coffee daily. A random sample of 300 U.S. adults is selected. Round your answers to at least four decimal places as needed. Part 1 of 6 (a) Find the mean . is 0.6500 The mean Alternate Answer: p The mean Part: 1/6 Part 2 of 6 is 0.65. 15 (b) Find the standard deviation . The standard deviation d is Español 00
A standardized exam's scores are normally distributed. In a recent year, the mean test score was 20.6 and the standard deviation was 5.6. The test scores of four students selected at random are 13, 23, 7, and 35. Find the z-scores that correspond to each value and determine whether any of the values are unusual. Question content area bottom Part 1 The z-score for 13 is (Round to two decimal places as needed.) Part 2 The z-score for 23 is (Round to two decimal places as needed.) Part 3 The z-score for 7 is (Round to two decimal places as needed.) Part 4 The z-score for 35 is (Round to two decimal places as needed.) Part 5 Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The unusual value(s) is/are (Use a comma to separate answers as needed.) B. None of the values are unusual.
- Fill in the balnks below - The lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation of 12 days. According to the Empirical Rule (as presented in our textbook), about 99.7% of pregnancies will last between and days.
Automobile Workers A worker in the automobile industry works an average of 42.2 hours per week. If the distribution is approximately normal with a standard deviation of 1.4 hours, what is the probability that a randomly selected automobile worker works less than 40 hours per week? Use a TI-83 Plus/TI-84 Plus calculator. Round the answer to at least four decimal places. P(X<40) =
High School Competency Test A mandatory competency test for high school sophomores has a normal distribution with a mean of 380 and a standard deviation of 80. Round the final answers to the nearest whole number and intermediate -value calculations to 2 decimal places. Part: 0/2 Part 1 of 2 (a) The top 5% of students receive $500. What is the minimum score you would need to receive this award? The minimum score needed to receive the award is [!!] 49 d
Current Attempt in Progress Johnson Electronics Corporation makes electric tubes. It is known that the standard deviation of the lives of these tubes is 155 hours. The company's research department takes a sample of 90 such tubes and finds that the mean life of these tubes is 2150 hours. What is the probability that this sample mean is within 20 hours of the mean life of all tubes produced by this company? Round your answer to four decimal places. P = i
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High School Competency Test A mandatory competency test for high school sophomores has a normal distribution with a mean of 460 and a standard deviation of 114 . Round the final answers to the nearest whole number and intermediate z -value calculations to 2 decimal places. (a)The top 6% of students receive $500 . What is the minimum score you would need to receive this award? The minimum score needed to receive the award is .
The price (dollars per 1,000 board feet) of Douglas fir from western Washington and Oregon varies according to a triangular distribution T(290, 360, 490). (a) Find the mean. Mean _________ (b) Find the standard deviation. (Round your answer to 2 decimal places.) Standard deviation ____________ (c) What is the probability that the price will exceed 420? (Round your answer to 4 decimal places.) Probability _____________
Doctoral Student Salaries Full-time Ph.D. students receive an average of $12,837 per year. If the average salaries are normally distributed with a standard deviation of $1500, find the probabilities. Use a TI-83 Plus/TI-84 Plus calculator and round the answer to at least four decimal places. Part: 0/ 2 Part 1 of 2 (a) The student makes more than S15.750. P(X>15.750) = %3D
High School Competency Test A mandatory competency test for high school sophomores has a normal distribution with a mean of 380 and a standard deviation of 81. Round the final answers to the nearest whole number and intermediate z-value calculations to 2 decimal places. The top 4% of students receive $500, what is the minimum.co (b) The bottom 2% of students must go to summer school. What is the minimum score you would need to stay out of this group? The minimum score needed to stay out of this group is 0 X $

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