A survey of 1024 people found 580 of them eat chicken soup when they have a cold or flu and concluded that a majority of the population believes that chicken soup helps relieve cold and flu symptoms. A computer simulation found the margin of error to be 3%. Does the conclusion seem reasonable? Why?

Q: In October 2017, the Gallup Poll asked a sample of 10281028 U.S. adults, "Are you in favor of the…

A: Margin of error: It is the vary of values below and higher than the sample data point in a…

Q: A researcher wants to estimate the impact prenatal care during pregnancy can have on anemia rates in…

A: It is given that the population proportion (prevalence) is 0.397. It is known that the critical…

Q: At the 2% level of significance, what is the decision?

A: Given : n1=10 , n2=10 , s1=22.4 , s2=12.0 , α=0.02 Our aim is to find the decision. Here , we use…

Q: In a large data set, the 49th percentile is 523 and the 71st percentile is 675.  About what…

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Q: The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An…

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Q: A cohort study examined the association between smoking and lung cancer after following 400 smokers…

A: RR = Risk of disease in (Group1)Risk of disease in (Group2)

Q: The executives at Sandbachian, inc., having recently solved their widget crisis, have another…

A: Let ‘x’ be the no of defective manhole covers i.e x=40 and n=800 sample propotion (P)=x/n p=40/800…

Q: Suppose a researcher wants to estimate the population proportion of defective light bulbs. He took a…

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Q: A researcher wishes to estimate the number of households with two types of vegetables in their…

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Q: Do you think that a margin of error greater than 5% is appropriate when conducting a research?

A: Margin of error helps to understand the confidence level of the research or survey. It is calculated…

Q: an you conclude that the percentage of people aged 18-29 who have a tattoo is less than 25%

A: Given : n=830 , X=166 , p0=0.25 , α=0.01 The estimate of the sample proportion is ,…

Q: You take a random sample of size 25 students and find the 5 who understand this lecture. With 99%…

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Q: Americans who believe the government should ensure basic health care is _________% with a margin of…

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Q: A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. How large a…

A: Given,          Sample proportion  P∧=0.09          Margin of Error∈=0.04          and…

Q: A recent survey found that 58% of U.S. adults use their smartphones to research and shop for…

A: The expression is  The margin of error is given as 5.3%.

Q: The median yearly salary for a police dispatcher in a large city was $44,528. If the 25th percentile…

A: a. The median yearly salary for a police dispatcher in a large city was $44528.

Q: If a study determines the difference in average salary for sub populations of people with blue eyes…

A: Given, As the study determines that the difference in average salary for sub-populations of people…

Q: A research report from an independent-measures study states that there are significant differences…

A: Given information- We have given a report from an independent- measures study. F(3, 48) = 2.95, p…

Q: In a survey of 1200 workers, 35% said they eat at home during a typical work week. What is the…

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Q: Miller Junior High is considering changing its school colors.  The results of a survey that 16 out…

A: Topic : unitary method

Q: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

A:

Q: In 2007, the CDC reported that approximately 6.6 per 1000 (0.66%) children were affected with autism…

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Q: A coworker says she needs to test 5000 subjects in order to have enough power to detect a…

A: Here for the above question, effect size is related with a sample size. As we know a test is…

Q: The sales force at a certain company successfully closed 92 out of 200 sales calls. What was their…

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Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

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Q: Addmissions officer sampled 124 entering freshmen and found that 35 of them scored less than 530 on…

A: According to the provided information, x=35 n=124

Q: If you choose to work with a t-score, how many degrees of freedom would you have?

A: Here given  Sample mean = 87 Sample size = n = 25

Q: A November 2018 Gallup Poll of 1075 U.S. adults found that 627 are satisfied with the total cost…

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Q: a pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: Given P=0.09 E=0.06 Z(0.01)=2.33

Q: Does it make sense ? Why or why not? A pollster plans to improve survey results by only conducting…

A: A pollster plans to improve survey results by conducting polls in which the margin of error is zero.

Q: The executives at Sandbachian, Inc., has recently solved their widget crisis, have another problem…

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Q: Suppose we have the results of a Gallup survey (simple random sampling) which asks participants for…

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Q: A random sample of 144 residents in a community produced 88 residents testing positive for the…

A: Null Hypothesis: H0:p=0.5 Alternative Hypothesis: H1:p≠0.5 Given information:…

Q: . An introductory stats professor hypothesizes that 50% of students learn best by watching the…

A: Test is that whether distribution of students is such that 50% of students learn best by watching…

Q: The results of a nationwide aptitude test in Mathematics are normally distributed with μ=80 and…

A:

Q: An entertainment company surveyed 360 elementary school children and found that 153 of them were…

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Q: Using a random sample of 4000 TV households, a media research company found that 65.8% watched the…

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Q: A poll is conducted and shows that 46% of homes have a landline, with a margin of error of 3%. a.…

A: Given that a poll is conducted and shows that 46% of homes have a landline with a margin of error of…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: From the provided information, Study indicates that proportion of left-handed scientists is 9% that…

Q: A Pew poll taken in 2010 surveyed 830 people aged 18-29 and found that 166 of them had one or more…

A: State the hypotheses.

Q: If the proportion of Hs is .45 out of 200 flips, what is the p-value?

A: Solution-: Given : We find p-value=?

Q: Define If the actual Y score was 31, but the predicted score was 28, then the error of prediction is…

A: The formula for the calculation of the prediction error is given below:

Q: A Verizon researcher compared the number of text messages sent by a sample of teenage boys to the…

A: a) In this case, the Verizon researcher compared the number of text messages sent by a sample of…

Q: A previous study showed that 69% of community college students have read a book for personal…

A: Given info: A previous study showed that 69% of community college students have read a book for…

Q: A researcher uses a repeated-measures design to compare individuals’ performance before treatment…

A:

Q: In fall 2014, 38% of applicants with a Math SAT of 700 or more were admitted by a certain…

A: LetA - Percent math S A T score of less than 700 or more in all applicants.B – Percent math SAT…

Q: A Pew poll taken in 2010 surveyed 830 people aged 18-29 and found that 166 of them had one or more…

A:

Q: The sales force at a certain company successfully closed 94 out of 200 sales calls. What was their…

A:

Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…

A: Given: n = 89, x = 52, α = 0.05, p = 0.59. Sample proportion: p^=xn=5289=0.5843

Q: A statistician changes her level of significance from .001 to .05.  What impact will this change…

A: The hypothesis test, will contain two hypotheses: null hypothesis and alternate hypothesis. The…