A recent study by the McGraw-Hill company showed that 61% (1621) of college students use their smartphones for studying. The sample size for this poll was 2657 students. Create a 95% confidence interval for the true proportion of all college students who use their smartphones to study. Round to two decimal places.

Q: A survey found that 73% of a random sample of 8344 American adults approved of cloning endangering…

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Q: A researcher found a 95% confidence interval for the proportion of college students who believe in…

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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: f n=450 and X = 360, construct a 99% confidence interval.

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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: A sample of 60 people who were chosen for a sample had an average IQ score of 105. If the population…

A: From the given, x¯ (mean IQ score from sample)=105n (sample size)=60σ (population SD of IQ…

Q: A famous scientist, Mendel, conducted a genetic experiment with peas. A sample from this experiment…

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Q: Kimberly and Alexis began arguing about who did better on their tests, but they couldn't decide who…

A: Given data,For mathμ=76.8σ=9.9Kimberly score is X=76.4For Socialμ=62.6σ=9Alexis score is X=63.2

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

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Q: In 2011, a U.S. Census report determined that 65% of college students are working students. A…

A: 1. Determine the test statisticz = -0.58 2. Find the p-valueP-value = 0.5615 Explanation:Step 1:…

Q: The average verbal SAT score for the entire class of entering freshmen is 530. However, if you…

A: given  The average verbal SAT score for the entire class of entering freshmen is 530. However, if…

Q: A poll reported that only 507 out of a total of 1809 adults in a particular region said they had a​…

A: The sampled no. of adults, i.e., the sample size, n=1809. The no. of sampled adults who expressed a…

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

Q: The winning   score in 5 high school basketball games was recorded. If the sample mean is 62.3…

A: Given information- Sample size, n = 5 Mean, x-bar = 62.3 Sample standard deviation, s = 11.0 Since…

Q: A CBS News / N.Y. Times poll found that 329 out of 763 adults said they would travel to outer space…

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Q: A national polling organization surveyed 1000 Americans and found that 350 admitted to being guilty…

A: Given: x=350 n=1000 p^=xn=3501000=0.35

Q: According to a study done in 2010, the mean number of sexual partners was 7.6. However, a…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

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Q: A poll of 1060 adults in a country was conducted by telephone. Of those surveyed, 169 had…

A: The sample size is 1060 and number of success is 169.

Q: A medical director needs to know the proportion of patients who have a single bed in their room. A…

A: It is given that sample size (n) is 200 and p-hat value is 0.59.

Q: Mikayla and Kathryn began arguing about who did better on their tests, but they couldn't decide who…

A: the students' test grades in the Art History class had a mean of 72 and a standard deviation of 9.3,…

Q: In a survey of 1550 U.S. adults, 1054 said that they use the social media website Facebook. Find a…

A: Given: n= 1550 ,x= 1054.0 At 92.0 % confidence level , z score= 1.751 Need to find confidence…

Q: A sample of 500 nursing applicants included 80 men.  Determine the 95% confidence interval for the…

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Q: In a study of 120 randomly selected families, 50 said they streamed their television content. Find…

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Q: A recent study of 85 workers found that 61 people rode the bus to work each day. Find the 95%…

A: Given that  A recent study of 85 workers found that 61 people rode the bus to work each day. Find…

Q: A paychologist theorized that people could hear better when they have just eaten a large meal. Six…

A: Two independent sample t test:A two independent sample t test is used to test the significant…

Q: In a sample of 110 adults, 76 had children. Construct a 95% confidence interval for the true…

A: It is given that, in a sample of 110 adults, 76 had children. It is needed to find a 95% confidence…

Q: The 90% confidence interval is from to. (Round to three decimal places as needed.)

A: A poll of 1030 adults in a country was conducted by telephone. Of those surveyed, 139 had…

Q: A research group asked 4488 Americans how they fall asleep, and 536 of them fall asleep on their…

A: Obtain the 90% confidence interval for the percentage of all Americans who fall asleep on their…

Q: In a random sample of 500 adults, 410 described themselves as vegetarians. Construct a 95%…

A: We have been provided with the following information about the adults who describe themselves as…

Q: Part of why cocaine is so dangerous is that it blocks dopamine receptors.  Researchers conducted an…

A: Consider the given dataset: Percent_dopamine_blocked rating cocaine high 74 6 40 2 34 1…

Q: In a random sample of 250 high school students, it was found that 85.2% (213) of them later…

A: Solution: From the given information, the 95% confidence interval is (–0.065, 0.065) and the 98%…

Q: Executives at a music label surveyed 125 people who actively download music and found that the…

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Q: In a survey of 4061 ​adults, 738 say they have seen a ghost. Construct a​ 99% confidence interval…

A: In this question, it has been given that 738 people out of 4061 people have seen the ghost, we have…

Q: A police officer waits on a road to catch speeding cars. In a one hour sample, the officer find that…

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Q: Natalie and Stephanie began arguing about who did better on their tests, but they couldn't decide…

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Q: When 290 college students are randomly surveyed, it is found that 120 own a car. Find a 99%…

A: Given that, x=120,n=290 The sample proportion is, Critical values: By using the standard normal…

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

A: Find z-critical value:…

Q: A recent survey suggests that 52% of Americans say dogs are their favorite animals. If 84 people are…

A: As per honor code, we will only answer first question: 1)  p=0.52 n=84, p^=0.42 Use the formula of…

Q: According to a report published by the USDA 4 years ago, a typical American consumes an average of…

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Q: You are testing the claim that the proportion of men who own cats is smaller than the proportion of…

A: As per our company guidelines we are supposed to answer only first question. Kindly repost other…

Q: According to Thomson Financial, through January 25, 2018, the majority of companies reported profits…

A: The sample proportion of companies showed beat estimates is, p^=104162=0.6420 The sample proportion…

Q: The 95​% confidence interval for the proportion that express a great deal of confidence or quite a…

A: A poll reported that only 645 out of a total of 2029 adults in a particular region said they had a​…

Q: Most adults would erase all of their personal information online if they could. A software firm…

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Q: To assess the proportion of the readers of a magazine being professional, a random sample of 1000…

A: Given that the random sample of 1000 readers is selected and 660 are found to be professionals. That…

Q: A recent survey of 120 individuals revealed that 50 thought they were worse off financially than a…

A: Given,n=120x=50α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: Last year, 535 out of 630 randomly selected U.S. firms tested their employees for drug use. Give a…

A: Given Data Sample Size, n = 630 Number of successes, x = 535

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.