A sample of n = 200 college students are asked if they believe in extraterrestrial life and 120 of these students say that they do. The data are used to test if more than half of college students believe in extraterrestrial life. d. Find a 95% confidence interval   e. Write a conclusion for the confidence interval

Q: Of 500 random people surveyed, 72 were smokers.  Find the 95% confidence interval. SE=0.0157

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Q: Use the Student's t distribution to find t, for a 0.95 confidence level when the sample is 27.

A: sample size=n=27 Degree of Freedom=n-1=27-1 =26 Confidence level is 0.95 Therefore the Level of…

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Q: If n= 200, X= 50,   Construct a 95% confidence interval estimate of the population Proportion π.…

A: Solution: From the given information, X=50 and n=200.

Q: Construct the confidence interval for the population mean y. C=0.95, x= 16.7, o= 4.0, and n= 75. A…

A: Here, C=0.95, x=16.7, σ=4.0, and n=75.

Q: Kim wants to determine a 99% confidence interval for the proportion of high school students in a…

A: We have given that,  Population proportion (p) = 0.53, margin of error (E) = 0.03 and confidence…

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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: From the table contingency table we can see that there are 17+39 = 56 children who did not go to…

Q: A recent survey showed that among 100 randomly selected college seniors, 20 plan to attend graduate…

A: Given that  A recent survey showed that among 100 randomly selected college seniors . Seniors plan…

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

A:

Q: Of 600 students sampled, 480 said they hoped to own a house someday. With 95% confidence, what is…

A: It is given that  Sample size, n = 600 Favourable cases, X = 4 Sample proportion, p^ = X/n  =…

Q: A survey asked, "How many tattoos do you currently have on your body?" Of the 1241 males surveyed,…

A: Given Information: Number of males surveyed = 1241 Number of males having at least one tattoo = 179…

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Given Information n =87 x =48

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

A: Solution

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 survey​ asked, "How many tattoos do you currently have on your​ body?" Of the 1238 males​…

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

A:

Q: If n = 18, = 46, and s = 16, construct a confidence interval at a 90% confidence level. Assume the…

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Q: Construct a confidence interval of the population proportion at the given level of confidence. X =…

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Q: In a survey of 2273 adults, 709 say they believe in UFOs. Construct a 95% confidence interval for…

A: Answer:- Given, Sample size, n = 2273 Number of successes on sample, x = 709Confidence level, C =…

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A: Estimation is a process whereby we select a random sample from a population and use a sample…

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…

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A: The 90% confidence interval for the population proportion is between (0.297,…

Q: A survey asked, "How many tattoos do you currently have on your body?" Of the 1241 males surveyed,…

A: We have given that,  X1 = 182, n1 = 1241  And  X2 = 139, n2 = 1047 Then,  We will find the 99%…

Q: In a survey of 2345 ​adults, 729 say they believe in UFOs.   Construct a 90 % confidence interval…

A: Given information- Sample size, n = 2345 We have given that out of 2345 adults 729 says they believe…

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

A:

Q: A survey asked, "How many tattoos do you currently have on your bodyr Of the 1203 males surveyed,…

A:

Q: Estimate the 95% confidence interval for the proportion of iPhone (Apple Inc.) users in your sample…

A: Obtain the 95% confidence interval for the proportion of iPhone (Apple Inc.) users.   The 95%…

Q: A survey of 360 college seniors found that 305 wish they had spent more time studying. Find a 94%…

A: Givensample size(n)=360x=305p^=xn=305360=0.8472confidence interval = 94%

Q: A Surprising fact indicates that a small proportion of teens use a password on their mobile device.…

A:

Q: Construct the confidence interval for the population mean ¥. C= 0.98, x= 15.4, o= 5.0 and n= 65. A…

A: Obtain the 98% confidence interval for the population mean y. The 98% confidence interval for the…

Q: n a survey of 2111 adults in a recent​ year, 1244 say they have made a New​ Year's…

A: For 90 % CI , α =0.1 Zα2= 1.645 (+NORMSINV(0.05) --Excel function)) ___________________ For 95% CI ,…

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.