Fron a random sample of 500 Google play apps with more than 1 million installs, 498 are free. Find and interpret a 95% confidence interval for the population proportion of free apps with more than 1 million installs. Write your interval up to 4 decimal places.

Q: Find the critical value for the population mean if there are 756 cats in a sample and you want a 91%…

A:

Q: í 600 people sampled, 348 had kids.

A: Given that  Sample size (n) = 600 Had kids (X) = 348   We know that  Best point estimate (p)= xn…

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

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: Out of 500 people sampled, 395 had kids. Based on this, construct a 90% confidence interval for the…

A: It is given that 395 out of 500 people sampled had kids. The sample proportion is 395/500 = 0.79.…

Q: A study found that for a sample of cars traveling on Interstate 70, the average speed was 70 mph…

A: We have to find margin of error.

Q: A random survey of 70 male sophomores showed 16 preferred off campus living and out of 63 female…

A:

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: For EACH of the 2 majors, consider the 'School Type' column. Construct a 90% confidence interval for…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: The mean hours of worked for United Airlines pilots is 46 hours/month based upon a sample of 25…

A: Given: Sample size, n=25 Sample mean, X=46 hours Sample standard deviation, s=3 hours The level of…

Q: We randomly sample 300 people in a specific town. 96 of them like cats. Based on this, construct a…

A: The provided information are: Sample size=n=300 Number of favroable cases==x=96 to Construct the 95%…

Q: Suppose that a 92% Confidence Interval for estimating the average heights, in inches, of all college…

A: confidence interval = x ± margin of errorlower limit = x - margin of errorupper limit = x + margin…

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

A:

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: In a survey of 2896 adults, 1441 say they have started paying bills online in the last year.…

A: Given data X=1441 n=2896

Q: A report statesb that 33% of home owners had a vegetable garden. how large a sample is needed to…

A: p=33%=0.33, E=5%=0.05

Q: Many high school students take the AP tests in different subject areas. In 2007, of the 211,693…

A:

Q: A statistics professor is in the process of investigating how many classes university students miss…

A: The population standard deviation is 2.2.

Q: A report statesb that 44% of home owners had a vegetable garden. how large a sample is needed to…

A: Answer: Using the given data, A report stated that 44% of home owners had a vegetable garden, P =…

Q: BCD Travel wants to estimate the population proportion of adults who favor historical sites for…

A: p^ = 59% = 0.59Sample size = 24086% confidence level

Q: 324 out of a simple random sample of 400 students hated their online math course. Find a 99%…

A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…

Q: A random sample of 100 employees at a company shows that 62 are female.  Form a 95% confidence…

A:

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: A survey of 50 randomly chosen students, 10 of them have a surfing board. Create a 99% confidence…

A: Given n = 50           x = 10  therefore, p=xn                    = 0.2 X ~ B (n, p) P(X=x) = Cxn…

Q: An internet service provider sampled 1000 of its customers, 189 of them experienced an interruption…

A: It is given that sample size (n) is 1000 and x is 189.

Q: A sample of 175 U.S. adults is composed of 100 women and 75 men. What is the estimate of the true…

A: Given problem Given 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: A sample of 400 homeowners includes 124 that expect their home to increase in value in the next…

A: Margin of error: ME=Zα/2 * √p̂(1-p̂)/n

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

Q: A motorcycle dealer with the "Hd" brand wants to know the percentage of students in the city "X" who…

A: We have to find confidence interval.

Q: A survey found that 611 out of 663 college graduates cannot correctly spell the word aluminum. Find…

A: Given that  A survey found that 611 out of 663 college graduates cannot correctly spell the word…

Q: confidence interval for a population mean is (56,78), with a margin of error of 11. What is the…

A: From provided information, Confidence interval for population mean is (56, 78), with margin of error…

Q: For a confidence level of 99% with a sample size of 22, find the t-score. Did not see how to work…

A: The provided information is:

Q: Construct the 99.8% confidence interval for the difference P1 - P2 when x, = 23, n, = 53, x2 = 15,…

A:

Q: 980 adults to learn about their gym membership. The results showed that 574 of the respondents lack…

A: The random variable X follows normal distribution. We have to construct 95% confidence interval for…

Q: A Pew Research Center survey of 1,857 internet users found that 1,124 people agreed that online…

A: Given: CI=95% p^=11241875=0.599 n=1875

Q: A poll showed that 385 out of 700 adults said they would be interested in traveling to outer space…

A: This question requires accurate results, Hence I will use excel to solve this question.…

Q: In a random sample, 136 of - persons given a flu vaccine experienced some discomfort. Construct a %…

A:

Q: Compute the probability of successfully completing the task for an engineer having 24 months of…

A: Given the data of monthly experience of the task is a success or not for 2 engineers as shown below…

Q: A scientist conducts an experiement with flowers, one sample of flowers consisted of 278 red dahilas…

A: Given that  Sample size n =278 Favorable cases x =108 Sample proportion p^=x/n  =108/278 =0.3885

Q: Nearly one-half of Americans ages 25 to 29 are unmarried. How large a sample is necessary to…

A: The provided information is The margin of error is E=0.02 α=0.05 The critical value is zc=1.96…

Q: Out of 42738 freshmen entering the State University system,  27298 of them need to take remedial…

A:

Q: please answer all parts

A: Understanding the ProblemWe're comparing two proportions:The proportion of U.S. men who can identify…

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.