neckA trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 80 thousand miles and a standard deviation of 10thousand miles. Complete parts (a) through (d) below.s anda. What proportion of trucks can be expected to travel between 66 and 80 thousand miles in a year?The proportion of trucks that can be expected to travel between 66 and 80 thousand miles in a year is(Round to four decimal places as needed.)b. What percentage of trucks can be expected to travel either less than 60 or more than 95 thousand miles in a year?%.The percentage of trucks that can be expected to travel either less than 60 or more than 95 thousand miles in a year is(Round to two decimal places as needed.)c. How many miles will be traveled by at least 85% of the trucks?The number of miles that will be traveled by at least 85% of the trucks ismiles.(Round to the nearest mile as needed.)d. What are your answers to parts (a) through (c) if the standard deviation is 8 thousand miles?View an exampleGet more help.Help me solve thisEt&Type here to search$8Nutrition Facts A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 80 thousand miles and a standard deviation of 10thousand miles. Complete parts (a) through (d) below.3VELIVE Brym Ny univew.The number of miles that will be traveled by at least 85% of the trucks is(Round to the nearest mile as needed.)miles.d. What are your answers to parts (a) through (c) if the standard deviation is 8 thousand miles?If the standard deviation is 8 thousand miles, the proportion of trucks that can be expected to travel between 66 and 80 thousand miles in a year is(Round to four decimal places as needed.)If the standard deviation is 8 thousand miles, the percentage of trucks that can be expected to travel either less than 60 or more than 95 thousand miles in a year is%.(Round to two decimal places as needed.)If the standard deviation is 8 thousand miles, the number of miles that will be traveled by at least 85% of the trucks is(Round to the nearest mile as needed.).Get more help -View an exampleHelp me solve thisE4-Type here to search%4+

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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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Solve for C)
What is the level of measurement of the variable “age”? A. IQR B. Range C. Median D. Ordinal E. Mode F. Nominal G. Mean H. Interval/Ratio I. IQV J. Standard deviation
Suppose that the heights of adult men in the United States are normally distributed with a mean of 70 inches and a standard deviation of 3.5 inches. What proportion of the adult men in the United States are at most 6 feet tall? (Hint: 6 feet 72 inches.) Round your answer to at least four decimal places.
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 33 beats per minute, the mean of the listed pulse rates is x =74.0 beats per minute, and their standard deviation iss = 13.2 beats per minute. a. What is the difference between the pulse rate of 33 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 33 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between -2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 33 beats per minute significant? a. The difference is beats per minute. (Type an integer or a decimal. Do not round.) b. The difference is standard deviations. (Round to two decimal as needed.) c. The z score is z= (Round to two decimal places as needed.) d. The lowest pulse rate is
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
At a tennis tournament a statistician keeps track of every serve. The statistician finds that the mean serve speed of a particular player was 110 miles per hour (mph) and the standard deviation of the serve speeds was 5 mph. Assume that the distribution of the serve speeds was bell shaped. Using the Empirical Rule, find the following. a) percent of serves expected to be above 120mph. b) proportion of serves expected to be between 105mph and 125mph. c) proportion of serves expected to be below 105mph. d) percent of serves expected to be within 3 standard deviations of the mean.
Assume a population of 3, 4, and 11. Assume that samples of size n = 2 are randomly selected with replacement from the population. Listed below are the nine different samples. Complete parts a through d below. 3,4 3,3 a. Find the value of the population standard deviation o. S ▼ 3,11 ▼ ■ 1 | 4,3 4,4 C (Round to three decimal places as needed.) b. Find the standard deviation of each of the nine samples, then summarize the sampling distribution of the standard deviations in the format of a table representing the probability distribution of the distinct standard deviation values. Use ascending order of the sample standard deviations. Probability (Type integers or fractions.) c. Find the mean of the sampling distribution of the sample standard deviations. The mean of the sampling distribution of the sample standard deviations is. 4,11 11,3 11,4 11,11
The results from a statistics class’ first test are as follows: The average grade obtained on the test by its 45 students is an 85, with a standard deviation of 15 points. Answer the following based on this information: a. Approximately how many people received a failing grade (less than 65) b. What percentage of people received a grade between a 70 and a 91? c. What percentage of individuals received a score whose z-score was -.70 or less? d. What grade is required in order to be in the top 15 percent? The top 10 percent? e. What percentage of people received a grade between 85 and 95? f. What percentage of people received a grade of 94 or less? g. What grade is required to be in the bottom 20%? h. What z-score is required to be in the top 40%? i. What percentage of individuals have a z-score between -1 and 1.40? j. What percentage of individuals have a z-score between 1.05 and 1.40?

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