Lifetime of a tire Assume the random variable L in Example 2fis normally distributed with mean u = 22,000 miles ando = 4,000 miles.a. In a batch of 4000 tires, how many can be expected to last forat least 18,000 miles?b. What is the minimum number of miles you would expect tofind as the lifetime for 90% of the tires?

A z-score represents the position of a data point in terms of its distance from the mean when…

Answered: Lifetime of a tire Assume the random…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Dorp 21 po ile The life of a light bulb is distributed normally, The Variance of the life time PS 225 and the mean life time of a bulb is 520 hours Find the probability Of a bulb lasting for at most 533 hours Round 4 decimal places
I of 10 (0 complete) v 7.1.1 A population has mean of 121. If a random sample of 8 items from the population results in the following sampled values, what is the sampling error for the sample? 116 122 98 145 148 110 141 144 O The sampling error for the given sample is. (Simplify your answer. Do not round.) Enter your answer in the answer box and then click Check Answer. Clear All All parts showing MacBook Air
A random experiment involves drawing a sample of 12 data values from a normally distributed population. The random variable is the range of the data set. 47 51 53 54 56 61 61 62 63 63 63 64 Give the random variable. (Appropriate rounding rules still apply.) r.v. =
Obstacle Course Times An obstacle course was set up on a campus, and 12 volunteers were given a chance to complete it while they were being timed. They then sampled a new energy drink and were given the opportunity to run the course again. The "before" and "after" times in seconds are shown below. Is there sufficient evidence at a=0.10 to conclude that the students did better the second time? Assume the variables are normally distributed. Student 1 3 4 6. 7 8 9 10 11 12 Before 76 81 77 75 67 72 80 80 78 82 69 68 After 73 76 73 68 68 70 76 65 75 78 65 70 Send data to Excel Part: 0 / 5 Part 1 of 5 (a) State the hypotheses and identify the claim. Ho: (Choose one) H : (Choose one) ▼ This hypothesis test is a (Choose one) ▼ test.
Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data. Test the null hypothesis that the population frequencies for each category are equal. α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe = What is the correct result based on the data?
Time left 1:37 An experiment has three steps. In the first step the possible outcomes are A, B, C, and D. In the second step the possible outcomes are E and F. In the third step the possible outcomes are G and H. How many experimental outcomes exist for the entire experiment? Select one: O a. 16 O b. 336 O c. 9 O d. 56 Consider a sample with data values of 10, 45, 60, 85, 90. Compute the IQR. Select one: to search
Obstacle Course Times An obstacle course was set up on a campus, and 12 volunteers were given a chance to complete it while they were being timed. They then sampled a new energy drink and were given the opportunity to run the course again. The "before" and "after" times in seconds are shown below. Is there sufficient evidence at a=0.10o to conclude that the students did better the second time? Assume the variables are normally distributed. Student 1 3 4 6. 7 8. 9. 10 11 12 Before 76 81 77 75 67 72 80 80 78 82 69 68 After 73 76 73 68 68 70 76 65 75 78 65 70 Send data to Excel Part 1 of 5 (a) Sta e claim. TH one-tailed v test. Part 2 of 5 TEther Ite them with Part: 2 / 5 Part 3 of 5 (c) Compute the test value. Round the sample statistics and final answer to at least three decimal places.
Solve for D
Which of the following is an example of a discrete random variable? The amount of time it takes for a worker to complete a complex task. The monthly electric bill for a local business. The number of people eating at a local cafeteria between noon and 2:00 p.m.
Finish Based on past records it is given that time to solve a certain problem during the exam is normally distributed with mean 151 seconds and variance 225 seconds?. If 500 students are to solve this problem, how many of them will solve it in more than 185 seconds? Round the number of students 1 to the nearest integer. 7 13 Select one: a.494 19 b.None c.349 d.3 e.6
X 6.3.10 Question Help Three randomly selected households are surveyed. The numbers of people in the households are 2, 4, and 9. Assume that samples of sizen=2 are randomly selected with replacement from the population of 2, 4, and 9. Construct a probability distribution table that describes the sampling distribution of the proportion of odd numbers when samples of sizes n= 2 are randomly selected. Does the mean of the sample proportions equal the proportion of odd numbers in the population? Do the sample proportions target the value of the population proportion? Does the sample proportion make a good estimator of the population proportion? Listed below are the nine possible samples. 2,2 2,4 2,9 4,2 4,4 4,9 9,2 9,4 9,9 Construct the probability distribution table. Sample Probability Proportion (Type an integer or fraction.)
Find the variance and standard deviation for the sample

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