According to a recent marketing campaign, 100100 drinkers of either Diet Coke or Diet Pepsi participated in a blind taste test to see which of the drinks was their favorite. In one Pepsi television commercial, an anouncer states that "in recent blind taste tests, more than one half of the surveyed preferred Diet Pepsi over Diet Coke." Suppose that out of those 100100, 5757 preferred Diet Pepsi. Test the hypothesis, using ?=0.01α=0.01 that more than half of all participants will select Diet Pepsi in a blind taste test by giving the following: (a) the test statistic (b) the critical ?z score

According to a recent marketing campaign, 100100 drinkers of either Diet Coke or Diet Pepsi participated in a blind taste test to see which of the drinks was their favorite. In one Pepsi television commercial, an anouncer states that "in recent blind taste tests, more than one half of the surveyed preferred Diet Pepsi over Diet Coke." Suppose that out of those 100100, 5757 preferred Diet Pepsi. Test the hypothesis, using ?=0.01α=0.01 that more than half of all participants will select Diet Pepsi in a blind taste test by giving the following: (a) the test statistic (b) the critical ?z score

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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According to a recent marketing campaign, drinkers of either Diet Coke or Diet Pepsi participated in blind taste tests to see which of the drinks was their favorite. In one Pepsi television commercial, an anouncer states that "in recent blind taste tests, at least one half of the surveyed preferred Diet Pepsi over Diet Coke." Suppose that in one of those taste tests, 5050 out of the 120120 participating preferred Diet Pepsi. Test the hypothesis, using α=0.05α=0.05 that at least half of all participants will select Diet Pepsi in a blind taste (hint: take HaHa to be that fewer than half prefer Diet Pepsi) test by giving the following:(a) the test statistic Recall the zz value that marks the start of the rejection region is the critical zz score; if you're lower tailed, it's the zz value that has left area of αα; if you're right tailed, it's the zz value whose area to the right is αα; if you're two-tailed, they're the values of the ±z±z value that −z−z has left area of α2α2 and zz…
According to a recent marketing campaign, 100100 drinkers of either Diet Coke or Diet Pepsi participated in a blind taste test to see which of the drinks was their favorite. In one Pepsi television commercial, an anouncer states that "in recent blind taste tests, more than one half of the surveyed preferred Diet Pepsi over Diet Coke." Suppose that out of those 100100, 5959 preferred Diet Pepsi. Test the hypothesis, using ?=0.05α=0.05 that more than half of all participants will select Diet Pepsi in a blind taste test by giving the following: (a) the test statistic (b) the critical ?z score
According to a recent marketing campaign, 00 drinkers of either Diet Coke or Diet Pepsi participated in a blind taste test to see which of the drinks was their favorite. In one Pepsi television commercial, an anouncer states that "in recent blind taste tests, more than one half of the surveyed preferred Diet Pepsi over Diet Coke." Suppose that out of those 100, 59 preferred Diet Pepsi. Test the hypothesis, using ?=0.05α=0.05 that more than half of all participants will select Diet Pepsi in a blind taste test by giving the following:
A research center claims that that 31% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1200 adults in that country, 33% say that would travel into space on a commercial flight if they could afford it. At alpa= 0.05, isthere enough evidence to reject the research centers claim complete parts a through d below
A doctor claims that less than 30% of all persons exposed to a certain amount of radiation will feel any ill effects.If in a random sample only 1 of 19 persons exposed to such radiation felt any ill effects,test Ho:p=0.30 against H1:p<0.30 at the 0.05 level of significance
A research center claims that 30% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 700 adults in that country, 34% say that they would travel into space on a commercial flight if they could afford it. At α=0.01, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below.
31% of all pygmy softshell toises have stripes on their shells. A herpetologist in Cititon collects a sample of 28 pygmy softshell tortoises and finds that 8 of them have stripes on their shells. Is there enough evidence to conclude, at a significance of alpha=0.05, that the proportion of pygmy softshell tortoises in Cititon with stripes on their shells is less than 31%? What is the claim? What is the null hypothesis? What is the alternative hypothesis? What is the test statistic? What is/are the critical value(s)? Do we reject the null hypothesis? What conclusion do we draw? What is the P-value for the problem above?
In a survey of 200 boys, of which 75 were intelligent, 40 had educatedfathers; while 85 of the unintelligent boys had uneducated fathers. Dothese figures support the hypothesis that educated fathers haveintelligent boys?
A store manager hypothesizes that the average number of pages a person copies on the store's copy machine is less than 40. A sample of 31 customers' orders is selected. At α=0.05, is there enough evidence to support the claim using the P-value method? Assume a=30.9 2 2 5 32 5 29 8 2 49 21 1 24 72 70 21 85 61 8 42 3 15 27 113 36 37 5 3 58 82 9 2 State the hypotheses and identify the claim. :H0: claim or not claim ▼(Choose one) :H1: claim or not claim ▼(Choose one) The hypothesis test is a ▼(Choose one) one tailed or two tailed test.
A researcher randomly selects 1000 death certificates and, after interviewing the attending physician, records the following information about the deceased: at the significance of the level of 5%, do these data show that smoking and cause of death are independent? Do you hold any assumptions here? If so, are they satisfied?
Suppose a group of 700 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 147 patients who received the antidepressant drug, 18 were not smoking one year later. Of the 553 patients who received the placebo, 206 were not smoking one year later. Given the null hypothesis ?0:(?????−????????)=0H0:(pdrug−pplacebo)=0 and the alternative hypothesis ??:(?????−????????)≠0Ha:(pdrug−pplacebo)≠0, conduct a test to see if taking an antidepressant drug can help smokers stop smoking. Use ?=0.04α=0.04, (a) The test statistic is (b) The P-value is
Medical researchers are studying a certain genetic trait found in two populations of people, W and X. From an independent random sample of people taken from each population, the difference between the sample proportions of people who carried the trait (W minus X) was 0.22. Under the assumption that all conditions for inference were met, a hypothesis test was conducted using the following hypotheses. H0:pW=pXHa:pW>pXH0:pW=pXHa:pW>pX The pp-value of the test was 0.03. Which of the following is the correct interpretation of the pp-value? The probability of selecting a person from population W who carries the trait is 0.22, and the probability of selecting a person from population X who carries the trait is 0.03. A If the proportions of all people who carry the trait are the same for both populations, the probability of observing a sample difference of at least 0.22 is 0.03. B If the proportions of all people who carry the trait are the same for both…