fThe average life expectancy of tires produced by the Whitney TireCompany has been 45,000 miles. Management believes that due to anew production process, the life expectancy of their tires hasincreased. In order to test the validity of their belief, the correct set ofhypotheses isO a. Ho: m2 45,000O b. Ho: ms 45,000O c. Ho: m< 45,000O d. Ho: m> 45,000H₂: m< 45,000H: m> 45,000Ha: m2 45,000Ha: ms 45,000

Given,The average life expectancy of tires produced by the Whitney Tire Company has been 45,000…

Answered: The average life expectancy of tires…

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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Similar questions

The alternative hypothesis, denoted by H0, represents the status quo and involves stating the belief that the population parameter is, ≤, =, or ≥ a specific value. Select one: True O False
In an introduction to statistics course, the students are given a basic exam to complete in class. Over the next few weeks, the students are given review sessions and then asked to complete the exam. The professor in the course expects the students’ grades on the exam to NOT increase. In analyzing the data, how should the alternative hypothesis be stated? a. Ha: µ1 < µ2 b. Ha: µ1 > µ2 c. Ha: µ1 = µ2 d. Ha: µD ≠ 0
In a study designed to test the "truth" to the theory that, on average, U.S. adults gain weight between Thanksgiving and January a research team looked at responses from 8 randomly selected U.S. adults. The subjects were weighed (lb) on the day before Thanksgiving and again on January 3rd The raw data are found in Table 1. Let ? = 0.025 Pre-Thanksgiving 168.2 173.5 164.3 166.4 167.6 164.9 172.1 169.8 Jan. 3rd 173.3 159.9 175.4 172.1 174.8 169.7 177.3 164.5 Diff 5.1 -13.6 11.1 5.7 7.2 4.8 5.2 -5.3 C) The point estimate for the true standard deviation of the weight gain that U.S. adults have from Thanksgiving until Jan. 3 is: E) The test statistic for this data set is F) The P-value for this study is:
The weekly expenditure on groceries of a random sample of 100 family households was recorded. It was estimated that the mean expenditure was approximately $240. With rising interest rates and petrol prices, it was anticipated that grocery expenditure might decrease. Which hypothesis test would you use to test this claim? a) One tailed, one sample t-test b) Two tailed, one sample t-test c) One tailed, z-test d) One-tailed Paired Samples t-test e) Chi Square
An organization monitors many aspects of elementary and secondary education nationwide. Their 2000 numbers are often used as a baseline to assess changes. In 2000, 23% of students had not been absent from school even once during the previous month. In the 2004 survey, responses from 7792 randomly selected students showed that this figure had slipped to 22%. Officials would be concerned if student attendance were declining. Please refer to the following images:
A statement of “no difference” that contradicts the research hypothesis and is always expressed in terms of population parameters is called the a. null hypothesis. b. right-tailed test. c. t statistic. d. specified value
In hypothesis testing, O if the test statistic is negative, this means the sample statistic is larger than the claimed population parameter. we call the initial claim being tested about the population an alternative hypothesis. it is not necessary to know the population size in order to compute the test statistic. the "P" in P-value stands for "personal." results that are statistically significant will always be practically important (or practically significant).
A professor believes that, in recent years, the ethnic composition of the students in the university has changed. According to the data collected a few years ago, there were 70% of students from European origins, 20% Asian origins, 5% Indigenous, and 5% Others. To test his belief, he randomly sampled 500 students and recorded their ethnicity as shown below: European 318 Asian 132 Indigenous 25 Others 25 The professor conducted a chi-squared goodness-of-fit test. Which of the following is the obtained chi-squared statistic for this test? A. 5.1443 B. 8.7898 C. 0.2288 D. 13.1657 E. 10.9777
You are testing the claim that a population proportion exceeds .62. The null hypothesis is H0H0:
When we test the hypothesis that the population proportions are equal, we can use the Z test for a one-sided as well as a two-sided alternative. Select one: a. False b. True C. Not sure
need b,c ,d not A
20. Which of the following is a null hypothesis? a. Pregnant women who drink cranberry juice will have lower urine bacterial counts than those who do not drink cranberry juice. b. The urine bacterial count of pregnant women who drink cranberry juice will be lower or equal to that of pregnant women who do not drink the juice. c. There will be a difference between ingestion of cranberry juice and among pregnant women who do and do not have high urine bacterial counts.

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