Road crews adjust the mount to ensure the width is correct. A road inspector checks the widthof 45 random stripes to see if the machine has slipped out of adjustment. The mean diameter forthis sample is x = 3.87 incheswith a standard deviation of s = 0.5 inches. Does this indicate that the machine has slipped out ofadjustment and the average width of stripes is no longer μ = 4 inches? Use a 5% level ofsignificance.Conduct a t test to examine whether the mean width of stripes is different from 4 inches.Calculate the P-value. (Round your answer to four decimal places.)What is the correct conclusion for the hypothesis test?

Answered: 5 random stripes to see if the machine…

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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Suppose the lengths of human pregnancies are normally distributed with u = 266 days and o = 16 days. Complete parts (a) and (b) below. (a) The figure to the right represents the normal curve with u= 266 days and o = 16 days. The area to the left of X= 245 is 0.0947. Provide two interpretations of this area. Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) X A. The proportion of human pregnancies that last less than days is 245 266 O B. The proportion of human pregnancies that last more than days is. Provide a second interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) A. The probability that a randomly selected human pregnancy lasts less than days is B. The probability that a randomly selected human pregnancy lasts more than days is ERest Converte
Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1. z= -1.06 The area of the shaded region is (Round to four decimal places as needed.)
Find the area of the shaded region. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. Click to view page 1 of the table. Click to view page 2 of the table. The area of the shaded region is (Round to four decimal places as needed.). Z=0.82 Q
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Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1. z= - 0.92 z= 1.28 The area of the shaded region is (Round to four decimal places as needed.) Entor vO owOr i:n the enower boy
Answer the blanks with ref highlighted marks. Use image two to determine the test procedure and p value
Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1. z= -1.08 The area of the shaded region is (Round to four decimal places as needed.)
Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. 106 132 The area of the shaded region is (Round to four decimal places as needed.)
Find the area of the shaded region under the standard normal curve. If convenient, use technology to find the area. REE -2.38
n4
Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1. z= -1.18 A symmetric bell-shaped curve is plotted over a horizontal scale. A vertical line runs from the scale to the curve at labeled coordinate “z equals negative 1.18,” which is to the left of the curve’s center and peak. The area under the curve to the right of the vertical line is shaded. Question content area bottom Part 1 The area of the shaded region is enter your response here. (Round to four decimal places as needed.)
The blood pressure in millimeters was measured for a large sample of people. The average pressure is 140 mm, and the SD of the measurements is 20 mm. The histogram looks reasonably like a normal curv Use the normal curve to estimate the following percentages. Choose the answer that is closest to being correct. A 19.1% B 30.9% C 38.2% D 69.1% E 68.27% A The percentage of people with blood pressure between 130 and 150 mm. B The percentage of people with blood pressure between 140 and 150 mm. D The percentage of people with blood pressure over 150 mm.

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