Which of the following is true?

Q: It was determined that the percentage of a's in the English language in the 1800s was 9%. A random…

A: It is given that the population proportion; p is 9% (=0.09). In the survey, it is found that 66 of…

Q: We would like to know if more than 43% of Spokane citizens favor an increase in the sales tax. We…

A: Given, The sample proportion is,

Q: In a previous year, 61% of females aged 15 and older lived alone. A sociologist tests whether this…

A: We have to find test statistics and p value...

Q: Find the value of the test statistic z using z =p - ppqn.A claim is made that the proportion of…

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Q: The random and 10% conditions are met. Is the Large Counts condition met?

A: The data is given by   Student Parent  Teacher Total Yes 24 12 6 42 No 21 13 6 40 Total 45…

Q: In a survey, 31% of the respondents stated that they talk to their pets on the telephone. A…

A: Given that n =150 ,p = 0.31

Q: In 2016, the US poverty rate was 12.7%. During that year, 370 families where randomly selected in…

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Q: In a survey, 36% of the respondents stated that they talk to their pets on the telephone. A…

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Q: esc In a 2013 poll, it was found that 0.78 of Americans cover their mouth when sneezing. A…

A: a)The p-value represents the probability of obtaining results as extreme as the observed results,…

Q: Perform a hypothesis test to test whether there is a difference in the average price. Use a = 0.05

A: Let μ1 and μ2 are the average prices of couches at two different stores. Given that,…

Q: d. The p-value = 0.4238 x (Please show your answer to 4 decimal places.) e. The p-value is sa f.…

A: GIVEN DATA, claim:p>0.56x=170n=278p^=xn=170278=0.6115here we have to find out the p-value for the…

Q: ecause the course seems too intimidating. The university administra nforms professors that the drop…

A: Let X be the number of persons possessing the given attribute in a sample of size 'n'. Let p denote…

Q: ou are testing the claim that the proportion of men who own cats is significantly different than the…

A: given data, sample of 100 men, and 10% own cats.n1=100p^1=0.10x1=0.10*100=0.10 You sample 80 women,…

Q: A: Is this a one-tail or a two-tail test? B: What is the alpha level of this test? C: What is the…

A: Given that  Hypothesized Population Mean (\mu)(μ) = 7373 Population Standard Deviation…

Q: The owner of a specialty coffee shop wants to study coffee purchasing habits of customers at her…

A: GivenMean(x)=7.78standard deviation(s)=1.62sample size(n)=79significance level(α)=0.01

Q: In a sample of 500 students from statistics courses in the fall semester, 312 earned a grade of C or…

A: Given information: The data represents the number of students and the number of students earned C…

Q: Test the claim that the proportion of men who own cats is significantly different than 45% at the…

A: Solution: Let X be number of men owned cats and n be the sample number of men. From the given…

Q: The numbers of online applications from simple random samples of college applications for 2005 and…

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Q: A research firm carried out a hypothesis test on a population proportion using a​ right-tailed…

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Q: You are a member of a club on campus. As part of the club's fundraising activities, you sell…

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Q: onduct a hypothesis test (two tails; alpha=.05). Show the following intermediate steps: State the…

A: The formula for computing the correlation is, r=n(∑xy)-(∑x*∑y)n(∑x2)-(∑x)2n(∑y2)-(∑y)2 The degrees…

Q: Suppose are running a study/poll about the proportion of men over 50 who regularly have their…

A: we have given that  sample size n=83  ,favorable cases x=76 ,population proportion=0.96

Q: Suppose you are using a = 0.05 to test the alternative hypothesis that u> 13 using a P-value. You…

A: We have given that,  Sample mean (x̄) = 13.3, sample size (n)= 50, population mean (μ) = 13,…

Q: A survey claims that 9 out of 10 doctors (i.e., 90%) recommend brand Z for their patients who have…

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Q: An article in the Washington Post on March 16, 1993 stated that nearly 45 percent of all Americans…

A: p^=xn= 2255= 0.40

Q: An airline company is interested in improving customer satisfaction rate from the 78% currently…

A: Hi! Thanks for posting the question. Since there are more than one question we will answer first…

Q: Find the standardized test statistic, z, to test the hypothesis that p1 < p2. Use α = 0.10.

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Q: Students in a high school statistics class are investigating the proportion of times a Hershey's…

A: We have to find correct conclusion from available options.

Q: Find the standardized test statistic, z to test the claim that p, = p2. The sample statistics listed…

A: The sample proportions are: The value of the pooled proportion is computed as :

Q: Only about 15% of all people can wiggle their ears. Is this percent different for millionaires? Of…

A: Given that,possible chances (x)=46sample size(n)=350success rate ( p )= x/n = 0.1314success…

Q: in october 1947 the gallup organization surveyed 1000 adult americans and asked are you a total…

A: We have given thatn1 = 1000 , x1 = 378n2 = 1000 , x2 = 333Significance level (α) = 0.05Now,p̂1 =…

Q: A student claims that statistics students at her school spend, on average, an hour doing statistics…

A: Null and alternative hypotheses: The hypothesis, which is pre assumed as true, tentatively settled…

Q: Find the standardized test statistic, z, to test the claim that p1< p2. Use α = 0.10. The sample…

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Q: According to a 2015 article, 37% of Americans aged 25 years or older have been arrested. An Orange…

A: Given that sample size n = 120 Number of persons who have been arrested, X = 48 Level of…

Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A: Given that, In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern…

Q: Time magazine reported the result of a telephone poll adult Americans. The question posed of the…

A: The two proportions z - test would be an appropriate to compare the significant difference between…

Q: steep aphea. live in the inner city have sleep apnea. Of the 317 people from the inner city…

A: An experiment is conducted and the test statistics and p value are given here. g)  The second…

Q: A publisher reports that 46% of their readers own a Jaguar. A marketing executive wants to test the…

A: Given,   Sample size = 220 Sample proportion = 0.50   The null and alternative hypothesis is:

Q: A headache medicine is tested on an experimental group of 50 patients who have headaches. Out of…

A: Experimental = sample 1 Placebo= sample 2

Q: A medical school claims that more than 28% of its students plan to go into general practice. It is…

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Q: A teacher measured brain activity in all 60 seniors in her Statistics class in the first week of…

A: The null and alternate hypothesis are H0 : μd=0HA : μd&lt;0 where, μd is the difference of the first…

Q: Zenon decided to Investigate whether students at his school prefer name-brand potato chips to…

A: Given : Randomly selected students ( n ) = 50 Null and alt. hypo : H0 : p = 0.5  Ha : p &gt; 0.5