36. A collar manufacturer is considering the production of a new style of collaratract young men. The following statistics of neck circumferences are available basedpon measurements of a typical group of college students :Mid-value (in inches) :12.012.513.013.514.014.515.015.516.0No. of students:163660763718Compute the standard deviation and use the criterion X+30 where o is the standarddeviation and X is the arithmetic mean to determine the largest and smallest size of the collar heshould make in order to meet the needs of practically all the customers bearing in mind thatcollars are worn on an average 1 inch longer than neck size.

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Answered: 36. A collar manufacturer is…

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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A simple random sample of 5 months of sales data provided the following information: Month: 1 2 Units Sold: 99 110 a. Develop a point estimate of the population mean number of units sold per month. b. Develop a point estimate of the population standard deviation (to 2 decimals). 3 84 4 99 5 93
The height of men is a normally distributed variable with a mean of 68 inches and a standard deviation of 3 inches. Round to ONE decimal place. A) what is the minimum height you could be to be considered in the top 5% of tallest men? B) what is the tallest you could be to be considered in the shortest 15% of men?
The bar graph below summarizes information aNew York City Survey of Elementary School Children(NYC DOHMH and DOE 2003). In a random sampleof 400 Hispanic NYC schoolchildren, what is theexpected number who are obese and the standarddeviation?A) mean 124; standard deviation 7.7B) mean 148; standard deviation 7.7C) mean 124; standard deviation 9.25D) mean 148; standard deviation is 9.66E) mean 124; standard deviation 11.1355
ACT Scores Based on the Normal model (mean = 20.8 and standard deviation = 4.8), describing ACT scores for Kentucky high school seniors. a) what percent scores would you expect to be over 22 (minimum admission for most state schools except Kentucky State and Uni. of Kentucky)? Draw a picture. b) what percent of scores would you expect ot be below 17 (minimum for admission to the rest of the state schools not mentioned). Draw a picture 3) what act score represents the 90th percentile? Draw a picture.
A variable is normally distributed with mean 32 and standard deviation 12. Use the Cumulative Z-Score Table to answer the following questions. Write your answers in decimal form using 4 decimal places. a) Find the area under the normal curve to the left of the data value 16.4. b) Find the area under the normal curve to the left of the data value 52.4. c) Find the area under the normal curve to the right of the data value 27.2. d) Find the area under the normal curve to the right of the date value 37.4, e) Find the area under the normal curve between the data values 37.4 and 52.4.
Combined city and highway gas mileage is approximately normally distributed with mean 23.0 mpg and standard deviation 4.9 mpg. A) Assume twenty 2016 model year vehicles are randomly selected. Describe the distribution of the variable x̄. i. Shape (Justify how you know your answer) ii. Mean iii. Standard deviation, rounded to three decimal places. B) Find the probability that the mean gas mileage of a sample of twenty 2016 model year vehicles is less than 24 mpg.
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A variable is normally distributed with mean 34 and standard deviation 11. Use the Cumulative Z-Score Table to answer the following questions. Write your answers in decimal form using 4 decimal places. a) Find the area under the normal curve to the left of the data value 63.7. b) Find the area under the normal curve to the left of the data value 2.1. c) Find the area under the normal curve to the right of the data value 30.7. d) Find the area under the normal curve to the right of the date value 29.05. e) Find the area under the normal curve between the data values 2.1 and 29.05.
b. In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national average for girls at this age is reported as follows: µ = 63.80 inches with a standard deviation, s = 2.66 inches. Compute z score
Rivets. A company that manufactures rivets believesthe shear strength of the rivets they manufacture followsa Normal model with a mean breaking strength of 950pounds and a standard deviation of 40 pounds.a) What percentage of rivets selected at random willbreak when tested under a 900-pound load? b) You’re trying to improve the rivets and want to exam-ine some that fail. Use a simulation to estimate how many rivets you might need to test in order to findthree that fail at 900 pounds (or below).
A population has a normal distribution with a mean of 32.9 and a standard deviation of 35.2. Draw 4. a normal curve with labels, shading, and what you entered into the calculator for full credit. Round your answer to 4 decimal places. Find the probability that a randomly selected item is between 27.5 and 40.6 a) Find the probability that a sample size of 25 is randomly selected and is less than 28.2. b)
III. SAMPLING AND SAMPLING DISTRIBUTIONS Assume that the systolic blood pressure of 30-year-old males is normally distributed, with an average of 122 mmHg and a standard deviation of 10 mmHg. а. b. Calculate the probability that the blood pressure of an individual male from this population will be between 118 and 124 mmHg.

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