During a motor test, the motor normalized rpm (or speed) is measured and recorded at regular intervals as99 103 95 105 100 98Calculate theA) Sample meanB) Sample standard deviationC) Best estimate of the true mean for this data set at 90% confidence.D) Test the data set for potential outliers.

Given that x x2 99 9801 103 10609 95 9025 105 11025 100 10000 98 9604 ∑x=600 ∑x2…

Answered: During a motor test, the motor…

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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To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 42 feet. Assume the population standard deviation is 4.7 feet. The mean braking distance for Make B is 45 feet. Assume the population standard deviation is 4.4 feet. At a = 0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) rari rz (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are (Round to three decimal places as needed. Use a comma to separate answers as needed.)
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 64 ounces and a standard deviation of 3 ounces. Use the Standard Deviation Rule, also known as the Empirical Rule. Suggestion: sketch the distribution in order to answer these questions. a) 95% of the widget weights lie between oz and b) What percentage of the widget weights lie between 55 and 70 ounces? % c) What percentage of the widget weights lie below 67 ? %
a standarized reading exam has a mean score of 80 with standard deviation =12. the distribution of scores i normal. Find the percentage of test takers who got: a) under 80 b) between 68 and 92 c) over 100 d) over 25 e) what is the 40th percentile?
Diastolic blood pressures are assumed to follow a normal distribution with a mean of 85 and a standard deviation of 12. What proportion of people has diastolic blood pressures less than 80? A)0.661 B)0.338 C)0.50 D)0.75
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 68 miles per hour, with a standard deviation of 3 miles per hour. Estimate the percent of vehicles whose speeds are between 65 miles per hour and 71 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately nothing% of vehicles travel between 65 miles per hour and 71 miles per hour.
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289 221 301 374 336 351 a)what is the standard deviation b) What is the first quartile and third quartile in this sample? c) What is the 43rd percentile of the data
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 35 ounces and a standard deviation of 10 ounces. Use the Standard Deviation Rule, also known as the Empirical Rule. Suggestion: sketch the distribution in order to answer these questions. a) 68% of the widget weights lie between and b) What percentage of the widget weights lie between 5 and 45 ounces? c) What percentage of the widget weights lie below 55 ?

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During a motor test, the motor normalized rpm (or speed) is measured and recorded at regular intervals as 99 103 95 105 100 98 Calculate the A) Sample mean B) Sample standard deviation C) Best estimate of the true mean for this data set at 90% confidence.