In a test to determine if mean weekly profit for a small business is more than $100 higher when advertising in a neighborhood newspaper ($100 isthe cost of the ad per week) than when not advertising in the neighborhood newspaper, what the null and alternative hypotheses should be?O Ho: Mad noad = $100, Ha: Madno ad >$100O Ho: Mad-noad -$100, Ha: Madno ad $100O Ho: Mad noad, HaHad noadO Ho: Mad-Hnoad. Ha Had> Hno ad

Answered: a test to determine if mean weekly…

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 observational units in a study are the patients arriving at an emergency room on a given day, 11 Nov 2019. For the following indicate whether it can legitimately be considered a variable or not: Whether or not men have to wait longer than women yes no
For a certain instant lottery game, the odds in favor of a win are given as 1 to 99. Express the indicated degree of likelihood as a probability value between 0 and 1 inclusive. The probability is -(Round to two decimal places as needed.)
How much more likely are alcoholics to say sober for a year after counseling if their best friend is not an alcoholic vs. if their best friend is an alcoholic? A researcher tracked 747 alcoholics whose best friends were not alcoholics and 517 alcoholics whose best friends were alcoholics. A year later 570 of those whose best friends were not alcoholics stayed sober for the year and 207 of those whose best friends were alcoholics stayed sober for the year. 1. Come up with the 99% confidence interval for the difference. Round your answers to four decimal places and present your answers as proportions rather than percents. ( __________ , ____________ )
The distribution of number of goals scored per match in the 15 home and 14 away matches so far this season for one team in the English Premier Soccer League is shown below. HOME AWAY 2 4 Goals Scored Per Match Which of the following statements is true? (A) The mean number of goals scored in AWAY matches is less than the mean number of goals scored in HOME matches. (B) The range of goals scored for AWAY matches is greater than the range of goals scored for HOME matches. (C) The shape of the distribution of HOME goals scored is left-skewed. (D) The median number of goals scored for AWAY matches is more than the median number of goals scored for HOME matches. (E) The number of AWAY matches in which the team scored three or more goals is three.
Mr. Jones believes that the mean income of lawyers has changed and is no longer $65 thousand per year. Which is the correct set of hypotheses to test this belief? O Ho:µ 2 65,000; Ha: µ 65, 000 О Нор - 65, 000; На: и # 65, 000 О Нор 65, 000
43. Harvey found that his z-score on a college readiness test, compared to others who took the same test was 1.25. Which of the following best describes how you might interpret this value? Only 1.25% of the people taking the test have scores higher than Harvey. Harvey's score was 1.25 times the mean score of all people taking the test. Hervey scored 1.25 points above the mean of all people taking the test. Harvey's score was 1.25 standard deviations from above the mean of all people taking the test.
In 2001, the polls found that 81% of American adults believed that there was a conspiracy in the death of President Kennedy. Assume a recent poll asked 1160 American adults if they believe there was a conspiracy in the assassination and it found that 897 believe there was a conspiracy. Does the data show that the proportion of Americans who believe in this conspiracy is now lower? Test at the 9% level. What is the correct parameter symbol for this problem? What is the wording of the parameter in the context of this problem? Fill in the correct null and alternative hypotheses:
Express the alternative hypothesis in symbolic form. A psychologist claims that the mean amount of time (in hours) that females spend in talk therapy is more than that of men. Assume that two samples are independent. Let the female talk therapy times be the first population and the male talk therapy times be the second population.
You are a consumer psychologist interested in holidy spending. A national census reports that the American family spent an average of μ = $81 for Halloween candy and costumes last year. A sample of N = 16 families this year produced a mean of $85 with s = 20 A) State your non-directional null and alternative hypothesis
If you look at the differences between the means, once with 10 participants and one mean with 20 participants. (same data set) One mean difference is very large, but non-significant and the other is very small, but came out significant. What could be the reason for this outcome? (My difference in means was with 10 participants: -1.1 and with 20 participants: -5.1)
are there two different ways to find the mean? are there two different formulas to find mean? i have an assignmnet that has a formula for mean as Xbar, another one as efx/ef, and another one as xbar=sigma X/n. what are the difference? how do you know which formula to use when you see a question?
Suppose you want to test the claim that a population mean equals 34. (c) State the alternative hypothesis if you believe (based on experience or past studies) that the population mean may exceed 34. A-H1: ? > 34 B-H1: ? < 34 C-H1: ? = 34D-H1: ? ≠ 34 E-H1: ? ≥ 34 (d) State the alternative hypothesis if you believe (based on experience or past studies) that the population mean may be less than 34. A-H1: ? > 34 B-H1: ? < 34 C-H1: ? = 34 D-H1: ? ≠ 34 E-H1: ? ≥ 34

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