A random sample of 230 people living in Seattle found that 83 of them had a pet. A random sample of 172 people in Spokane found that 47 of them had a pet. Let p-hat 1 be the proportion of pet-owners in Seattle and p-hat 2 be the proportion of pet owners in Spokane. Find an 80% confidence interval for the difference in proportions. Use three decimals when computing the proportions and give your final answer to three decimal places.

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: GIVEN DATA,  n=971x=554P^=Xn=554971=0.5705CI=0.99α=1-0.99=0.01we have to find out the confidence…

Q: Ninety-four percent of students said that cash is their top choice for a graduation gift. If 75…

A: It is given that sample size (n) is 75and the sample proportion value is 0.94.

Q: A Pew Internet Project Data Memo presented data comparing adult gamers with teen gamers with respect…

A: Given : p̂1 = 0.54 p̂12 = 0.89 n1 = 1063 n2 = 1064

Q: In a recent poll, 300 people were asked if they liked dogs, and 54% said they did. Find the Margin…

A: Obtain the margin of error for the poll at the 95% confidence level. The margin of error for the…

Q: In a sample of 460 adults, 262 had children. Construct a 95% confidence interval for the true…

A: Provided information: Total number of adults = 460 and 262 had children 95% confidence level

Q: In a study, 132 children of a certain race in a certain city were randomly assigned to one of two…

A: Step 1: Given: For the Preschool group:42 graduated from high school (say x1​)and altogether there…

Q: Over the break, you do some reasearch. In a random sample of 250 U.S. adults, 56% said they ate…

A:

Q: Belief in Haunted Places A random sample of 280 college students were asked if they believed that…

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Q: Having good relationships with coworkers is an important part of overall job satisfaction. A poll…

A: Given, The 95% confidence interval for the population proportion , p is (0.4872,0.5528)

Q: In a recent poll, 410 people were asked if they liked dogs, and 24% said they did. Find the Margin…

A: We have to find margin of error.

Q: A television station surveys 200 customers and finds that 23% of customers watch the evening news.…

A: Given data n=200 p=23% confidence level=99%

Q: A random sample of 600 adults in Flagstaff found 90 adults who had lost a job in the past year. Find…

A: Step 1:Given data : Sample size n=600no. of successes x=90   Sample proportion p^​=60090​=0.15Let p…

Q: researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 520…

A:

Q: In a survey of 2282​ adults, 749 say they believe in UFOs. Construct a 90% confidence interval for…

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Q: T.J. wants to estimate the percentage of college students who have taken out student loans. He…

A:

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: A department chair wanted to know whose students performed better on a common pass/fail final exam:…

A: p1 :  proportion of students passed in smith's  class p2 :  proportion of students passed in Jones's…

Q: In a recent poll, 410 people were asked if they liked dogs, and 32% said they did. Find the Margin…

A:

Q: A survey of 100 men found that 68% said they find it hard to buy holiday gifts that convey their…

A: Solution

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: In a sample of 310 adults, 177 had children. Construct a 87% confidence interval for the true…

A: Find z-critical value:…

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A: Reviewing information, n1=262 x1 : No. of identified dog person in a city=117 n2=108 x2 : No. of…

Q: A survey found that 33 of 66 randomly selected women and 37 of 66 randomly selected men follow a…

A:

Q: In a recent poll, 260 people were asked if they liked dogs, and 80% said they did. Find the Margin…

A: Given:

Q: 2. Construct a 95% confidence interval to estimate the proportion of Wingate female students that…

A: total number of female students =181 number of students who are left handed=15

Q: t poll, 240 people were asked if they liked dogs, and 35% said they did. Find the Margin of Error…

A: Given: n = 240 p^=35%=0.35 The value of z at 95% confidence level is 1.96, which can be obtained by…

Q: A random sample of 2000 car owners in a particular city found 740 car owners who received a speeding…

A:

Q: Examining a random sample of records from my past Statistics classes, I found the 47 of the 282…

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Q: The sample proportion p̂ is important in calculating a confidence interval. Find p̂ for a sample…

A: Answer:- Given, Sample size ,n = total number of responses = 80 Total number of "yes" responses , x…

Q: 24. Job Interviews In a Harris poll of 514 human resource professionals, 90% said that the…

A: From the parts b) and c), the 99% confidence interval is (0.8659 , 0.9341) and the 80% confidence…

Q: A poll done for Newsweek found that 13% of Americans have seen or sensed the presence of an angel. A…

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Q: In a study, 110 children of a certain race in a certain city were randomly assigned to one of two…

A: There are two independent samples which are Preschool and No Preschool. We have to construct 95%…

Q: A poll commissioned by the Center on Addiction and Substance Abuse at Columbia University found that…

A: Given that, X = 1340 N = 2000 98% confidence level

Q: A recent survey conducted in a nearby town showed that 791 out of 1,495 people do most their holiday…

A: Here, the sample proportion is =7911495=0.5291 Now, for 90% confidence z=1.645

Q: At one large college, 1867 out of the 2500 students surveyed said they plan to take another science…

A: The known values are, p^=1,867/2,500=0.7468, n=2,500. Using standard normal table, the critical…

Q: In a recent poll, 450 people were asked if they liked dogs, and 54% said they did. Find the Margin…

A: Solution

Q: Suppose you want to construct a 95% confidence interval for the difference

A:

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Given; x=561n=935The level of significance is;α=1-0.95=0.05 (a) The best point estimate of the…

Q: A researcher gathered a sample of participants who volunteered for a studying of phobias. She…

A: A researcher gathered a sample of participants who volunteered for a studying of phobias. She…

Q: A poll reported that only 1316 out of a total of 1746 adults in a particular region said they had a…

A: