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: Out of a sample of 600 adults aged 18 to 30, 162 still lived with their parents. Based on this,…

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Q: A recent study of a very large number of parents on cyberbullying showed that a 95% confidence…

A: Given data,For 95% CILower limit=0.1238Upper limit =0.2036Proportion (p)=?

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: A stock market analyst notices that in a certain year, the price of IBM stock increased on 131 out…

A: It is given that the price of IBM stock increased on 131 out of 252 trading days.

Q: In a survey of randomly selected 1040 adults from the US, 83 said they believed that the food they…

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Q: results

A: Let X be the number of medical doctors that had a solo practice.  N : A sample size of medical…

Q: In a recent poll, 200 people were asked if they liked dogs, and 16% said they did. Find the Margin…

A: Solution: From the given information, 0.16 and n=200. The confidence level is 0.90.

Q: In a recent poll, 370 people were asked if they liked dogs, and 69% said they did. Find the Margin…

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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: A poll asked 1011 American adults if they believe there was a conspiracy in the assassination of…

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Q: When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted…

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Q: In a recent poll, 300 people were asked if they liked dogs, and 89% said they did. Find the margin…

A: Solution: From the given information, p-hat=0.89 and n=300.

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: We have to find the length of confidence interval for the proportion.

Q: In a recent poll, 260 people were asked if they liked dogs, and 13% said they did. Find the margin…

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Q: A recent poll of 1001 Americans age 18 and over conducted in May of 2013 found that 80% of the…

A: Obtain the sample size. The formula of sample size is, Here, confidence level is 0.95.   Use EXCEL…

Q: The Centers for Disease Control and Prevention reported a survey of randomly selected Americans age…

A: Confidence interval for Proportions : The following is the formula for confidence interval of the…

Q: In a recent poll, 240 people were asked if they liked dogs, and 46% said they did. Find the Margin…

A: Given that, Critical values: By using the standard normal table of Z, the critical value at 95%…

Q: A research found that 70% of 1500 randomly selected U.S. adults believe in global warming. Find the…

A: Solution: From the given information, p-hat=0.70 and n=1500.

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

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Q: When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted…

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Q: A survey of 499 women for the American Orthopedic Foot and Ankle Society revealed that %37 wear…

A: Given : p = 0.37 q = 1 - p   = 1 - 0.37   = 0.63 n = 499

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 recent poll, 190 people were asked if they liked dogs, and 54% said they did. Find the Margin…

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Q: In a recent poll, 600 people were asked if they liked dogs, and 58% said they did. Find the margin…

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Q: In a recent poll, 300 people were asked if they liked dogs, and 73% said they did. Find the margin…

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Q: A researcher was commissioned to find out the proportion of students who use mobile phones in online…

A: Given: X=475N=500ME=0.01CI=0.99

Q: In a recent poll, 289 people were asked if they liked dogs, and 17% said they did. Find the margin…

A: Let X be the number of people who liked dogs Given: Number of people or sample size (n) = 289…

Q: A recent survey found that 35 people out of a sample of 410 South Africans suffer from diabetes.…

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Q: A U.S. Travel Data Center survey of 500 adults found that 195 said they would take more vacations…

A: Solution: Let X be the number of adults who said that they will travel more this year and n be…

Q: Out of 100 people sampled, 44 have lied to a family member in the past month. Based on this,…

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Q: In a recent poll, 170 people were asked if they liked dogs, and 87% said they did. Find the Margin…

A: Given  p = 0.85, n = 170  Find margin of error for this poll

Q: In a recent survey of 500 teenagers, 18.6% indicated that they had eaten junk food while watching TV…

A: Given Data: p^=0.186n=500

Q: poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given…

A: Given: n= 763 ,x= 329 At 92.0 % confidence level , z score= 1.751 Need to find confidence interval…

Q: In one city, 32.4% of the 5000 students surveyed said they eat at the school cafeteria. Find the 95%…

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Q: A research poll of 1501 adults showed that 1051 of respondents believe in global warming. Find a 98%…

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Q: In a recent poll, 190 people were asked if they liked dogs, and 81% said they did. Find the Margin…

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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: A survey conducted by the U.S. department of Labor found the 48 out of 500 heads of households were…

A: Given that, n = 500 x = 48 90% confidence interval

Q: Of 130 adults selected randomly from one town, 30 of them smoke. Construct a 90% confidence interval…

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Q: In a survey of 2291 ​adults, 708 say they believe in UFOs.   Construct a 90% confidence interval for…

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Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: In a recent poll, 600 people were asked if they liked dogs, and 33% said they did. Find the Margin…

A: Margin of error (M.E.): The margin of error for proportion p is given by,

Q: Based on a sample of 1000 adult Americans, USA Today reported that 840 of them preferred cheese on…

A: Given that on a sample of 1000 adult Americans, USA Today reported that 840 of them preferred…

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: Given Information: Sample size n=1500 Sample proportion p^=0.13 Margin of error E=3%=0.03 The higher…

Q: In a recent poll, 500 people were asked if they liked dogs, and 94% said they did. Find the margin…

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Q: In a recent poll, 290 people were asked if they liked dogs, and 61% said they did. Find the Margin…

A: Given: Sample size (n) = 290 Sample proportion p^=0.61 Confidence level = 0.90 So, α=1-0.90=0.10

Q: When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted…

A: a. The sample proportion of yellow peas is, Thus, the sample proportion of yellow peas is 0.262.

Q: Out of 3064 respondants, 919 of them said they have a dog. Using this data, compute a 95% confidence…

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Q: Of 130 adults selected randomly from one town, 25 of them smoke. Construct a 99% confidence interval…

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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.