A 95% confidence interval for the true proportion of teenagers who have been to a professional sporting event is (0.289, 0.416). Is it reasonable to believe that more than 25% of teenagers have been to a professional sporting event? O Yes, because 0.3525 is in the interval. Yes, because the entire interval is greater than 0.25. O No, because there are values in the interval greater than 0.3525. O No, because the center of the interval is 0.3525, which is not statistically greater than 0.25. Mark this and return Save and Exit Next Submit

Q: A recent claim has been made that people who have iPads spend more time on their iPads than people…

A: Critical value = 1.96 Decision rule : Reject H0 if |z|>1.96 Here |z|=|-2.81|=2.81 >1.96

Q: A random sample of residents in city J were surveyed about whether they supported raising taxes to…

A: Given that, A random sample of residents in city J were surveyed about whether they supported…

Q: A November 2018 CBS News Poll found that 35% of its sample planned to use online retailers for most…

A: Given that, A November 2018 CBS News Poll found that 35% of its sample planned to use online…

Q: The National Weight Control Registry tries to mine secrets of success from people who lost at least…

A: Given - Sample size, n = 2720 Number of registrants on a low-carb diet,X = 439 Proportion of…

Q: A recent national survey indicated that 73 percent of respondents try to include locally grown foods…

A: The 95% confidence interval for the proportion of all people in the country who try to include…

Q: In a recent survey, a random sample of Ohio football fans was asked to indicate whether they believe…

A:

Q: A pew Poll conducted in 2013 surveyed a random sample of 2003 adult Americans, and 18% of them said…

A: The random variable X follows normal distribution. We have to construct 90% confidence interval.…

Q: Kim wants to determine a 80 % confidence interval for the true proportion ? of high school students…

A:

Q: In a survey on supernatural experiences, 722 of 4019 adult Americans surveyed reported that they had…

A: Given : Sample Size, n = 4019 Number of successes, x = 722 confidence level,c=0.9

Q: calculate a 95% confidence interval for the mean profit per customer that SoftBus can expect to…

A: Given : n=3 , ƩX=13500 , ƩX2=61250000 Now ,  The sample size is , n=3 The sample mean is ,…

Q: The National Weight Control Registry tries to mine secrets of success from people who lost at least…

A: X: People on a low-carbohydrate diet. X=439 n=2720

Q: A two-tailed hypothesis test for H0: μ = 20 at α = .05 is analogous to asking if a 95 percent…

A: Given: Level of significance =  α = 0.05  A two-tailed hypothesis test for H0: μ = 20  against H1:…

Q: A simple random sample of 120 vet clinics in the Midwest reveals that the vast majority of clinics…

A: Given that; Sample size (n) = 120  X = 88  At 90% confidence interval .

Q: The researcher rejected the null hypothesis at the 95% confidence level where F(2, 14) = 53.54, p =…

A: F-table  / Technology can be used to find P-value. I am using Excel function,

Q: Out of a sample of 1,450 people, 1,000 said they prefer to drive themselves to work rather than…

A: Given Data: x=1000 n=1450   p^=10001450=0.6897   z-value corresponding to 95% Confidence…

Q: A sample of 800 persons showed that 15% of them do not have any health insurance. The 95% confidence…

A: Solution: From the given information, p-hat=0.15 and n=800. The confidence level is 0.95.

Q: A human resource manager wants to see if there is a difference in the proportion of minority…

A: Confidence Interval: Confidence interval is the interval estimate of the population parameter. It is…

Q: If a 95% confidence interval on the difference in two means is – 9.4 < µ1 – H2 < 3.2 you would have…

A: We do not reject the null hypothesis H0: μ1=μ2orH0: μ1-μ2=0 if 0 lies in the confidence interval of…

Q: A simple random sample of 120 vet clinics in the Midwest reveals that the vast majority of clinics…

A: Given that  Sample size n =120 Favorable cases x =88 Sample proportion p^=x/n  =88/120 =0.7333

Q: A university admissions person claims that more than 70% of its students graduate within four years.…

A: Given that  A university admissions person claims that more than 70% of its students graduate within…

Q: b. In a random sample, 165 of 500 persons given a flu vaccine experienced some discomfort. i.…

A: Given that  Sample size n =500 Favorable cases x =165 Sample proportion p^=x/n  =165/500 =0.33

Q: In describing the findings of a 2010 Public ReligionResearch Institute poll, the researchers…

A: Margin of error (E)= Z * SE   As the confidence interval increases z-value also increases. Example:…

Q: Beth wants to determine a 95 percent confidence interval for the true proportion p of high school…

A: Here we need to find the required sample size inorder to construct a 95% confidence interval for the…

Q: If the number of smokers in a sample of 40 students selected from university A is 12 and the number…

A:

Q: A random sample of residents in city J were surveyed about whether they supported raising taxes to…

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

Q: "Athletes at major colleges graduated, on the whole, at virtually the same rate as other students."…

A: a. The best point estimate of the population proportion is the sample proportion. It was found that…

Q: The conservative sample size required for a 95 percent confidence interval for π with an error of…

A: Given: Confidence level = 0.95 So, α=1-0.95=0.05 The confidence interval is two sided. Margin of…

Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

A:

Q: Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: A survey of 800 women shoppers found that 17% of them shop on impulse What is the 98% confidence…

A:

Q: In the week before and the week after a​ holiday, there were 11,000 total​ deaths, and 5467 of them…

A: Find z-critical value:…

Q: Suppose that 18% of a random sample of 2307 Miami residents said that they will donate blood in…

A: The sample proportion is given as 0.18. The sample size is given as 2307. The two-tailed z-critical…

Q: According to a study completed in 2006 by Pew Internet, 42% of all Americans had a broadband…

A: The 95% confidence interval for p is (0.439, 0.457).

Q: In a​ poll, 51​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Let p denote the proportion of people answered yes to the question. Let E denote the margin of…

Q: A researcher studying reaction time of drivers states that A 95% confidence interval for the m time…

A:

Q: For testing the second figure in the report, let p be the proportion of email users who feel that…

A: The 95% confidence interval for p is (0.273, 0.304).

Q: The true proportion of c.c. students in her state, that receive an AD, is contained in that specific…

A: It is given that the confidence interval in b is calculated correctly.

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpillars…

A:

Q: If appropriate, construct a 99.9% confidence interval for the ounce milkshakes sold at fast-food…

A: Data  504,450,399,613,608,700,472,510,642,591,375,580

Q: a) Construct a 93% confidence interval for the corresponding true proportion. b) With what degree of…

A: p = 0.19 n = 100 Margin of error = 0.02

Q: In a certain year, there were 80 days with measurable snowfall in Denver, and 63 days with…

A:

Q: A 90 percent confidence interval for the proportion difference p1−p2p1−p2 was calculated to be…

A: It is given that the confidence interval for the proportion difference p1 – p2 is (0.247,0.325).

Q: Beth wants to determine a 90 percent confidence interval for the true proportion p of high school…

A: The required margin of error (E) is less than 0.04. The sample proportion p^ is 0.50 (because…

Q: 11th - It was observed that 30 out of 100 randomly selected students smoked. Estimate the 95%…

A: we associate with the interval estimate is called confidence interval. This probability indicates…

Q: A farmer wants to test the effectiveness of a pest control method in allowing strawberry blooms to…

A: Solution: Let X be the number of blooms that yield marketable strawberries and n be the sample…

Q: The biologist is studying Black Carp invasiveness in Lake Ontario next. He doesn't have time to…

A: Given,n=75x=29sample…

Q: Based upon the results of the sample in #1, can you say with 95% confidence that your confidence…

A:

Q: Suppose you didn’t know whether the coin was fair or not and you wanted to determine a 95%…

A: It is given that sample size (n) is 16,000 and x is 8040.

Q: A 95% confidence interval for p, the true proportion of all shoppers at a large grocery store who…

A: Given: A 95% confidence interval for p, the true proportion of all shoppers at a large grocery…

Q: 95% confidence interval for the proportion of college students who have texted during class was…

A: Given that  95% confidence interval=(0.75 , 0.95)

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.