Question 1. Determine whether the following statements are TRUE or FALSE.(a) If distribution of paired difference (d) is normal with unknown standard deviation, we uset-test for mean of paired difference.(b) P-value is the smallest level of significance at which the null hypothesis is not rejected.(c) If n < 30 and distribution is not normal, for testing the mean we use t-test(d) A t-test for mean is used if n > 30 and population standard deviation is unknown.

a) If the distribution of the difference (d) is normally distributed , and we not have been provided…

Answered: Question 1. Determine whether the…

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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The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 120, while the mean score was 71 and the standard deviation was 10.
Yolanda Gonzales owns and manages a small business in San Francisco, California. The business provides breakfast and brunch food, via carts parked along sidewalks, to people in the business district of the city. Being an experienced businessperson, Yolanda provides incentives for the four salespeople operating the food carts. This year, she plans to offer monetary bonuses to her salespeople based on their individual mean daily sales. Below is a chart giving a summary of the information that Yolanda has to work with. (In the chart, a "sample" is a collection of daily sales figures, in dollars, from this past year for a particular salesperson.) Sample Sample Sample size Groups mean variance Salesperson 1 116 204.2 2252.4 Salesperson 2 86 221.6 2572.6 Salesperson 3 63 198.7 2231.6 Salesperson 4 95 210.4 2346.7 Send data to calculator Send data to Excel
Q1. Researchers developed a "cat IQ test" and find that the population of cats in the United States has a mean score of µ = 25 on this test with a standard deviation of σ = 3. You decide to test a sample of n = 45 cats to do some research about whether some breeds are smarter. What is the expected value of the sampling distribution of the mean?
21. In a study where scientists wanted to compare two different techniques for measuring the amount of milk ingested by 16 infants, the mean and standard deviation of the measured differences were d = 135 and SD = 200 respectively. A probability plot of the differences showed that differences are distributed according to a normal distribution. At a = 0.01 significance level, does it appear that the true average difference between the intake values measured by the two methods is greater than zero? (You can use the following value from a t-table as needed: P(tı5 > 2.7) = 0.008.)
Please explain all
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Indicate whether the following sentences are true or false: (T/F) 10-Researchers only need to know how to develop certain tests, how to calculate the mean, the mode, the median or the standard deviation or chi-square, how to apply particular research techniques, but they also need to know which of these methods or techniques, are relevant and which are not, and what would they mean and indicate and why.
. nonzerorands expects 3 arguments The average American consumes 100 liters of alcohol per year. Does the average college student consume a different amount of alcohol per year? A researcher surveyed 15 randomly selected college students and found that they averaged 86 liters of alcohol consumed per year with a standard deviation of 16 liters. What can be concluded at the the a = 0.05 level of significance? a. For this study, we should use t-test for a population mean b. The null and alternative hypotheses would be: Ho: μν H₁: 100 100 E -3.389 (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) c. The test statistic t d. The p-value = e. The p-value is > ✓ a f. Based on this, we should fail to reject g. Thus, the final conclusion is that ... the null hypothesis. O The data suggest the populaton mean is significantly different from 100 at a = 0.05, so there is statistically significant evidence to conclude that the population mean amount of…
Professor Nord stated that the mean score on the final exam from all the years he has been teaching is a 79%. Colby was in his most recent class, and his class’s mean score on the final exam was 82%. Colby decided to run a hypothesis test to determine if the mean score of his class was significantly greater than the mean score of the population. α = .01. What is the mean score of the population? What is the mean score of the sample? Is this test one-tailed or two-tailed? Why?
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Assume that a population of thousands of people whose responses were used to develop the anxiety test had scores that were normally distributed with meand of 30 and standard deviation of 10. What proportion of people in this population would have anxiety scored within each of the following ranges of scoores? below 20 above 30 between 10-50 below 10 or above 50

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