You draw a simple random sample of 10 items from a Normal Population that has a standard deviation of 100. Your sample average is 1200. What is the 95% confidence interval for the mean?   Group of answer choices a 1,004 - 1,396 b 1,180 - 1,220  c 1,138 - 1,262  d 1,136 - 1,264

Q: You wanted to know how long on average a business student at your university studies per night. You…

A: Given data is 2,1,3,2,4,1,0,3,2,4sample size(n)=10

Q: A statistics teacher wants to see if there is any difference in the abilities of students enrolled…

A: The point estimate for the difference between the means is –7 and the standard error is 3. Using…

Q: Which of the following illustrates a confidence level? a. 95%                     b.12.5…

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Q: ccording to the data, calculate a 90% confidence interval for the sample mean. What was the T Score…

A: Solution: n= 30 Sample size ∑xi=642 x=∑xin=64230=21.4 Sample mean s2=∑(xi-x)2n-1=56.52414 Sample…

Q: A student conducted a study and reported that the 95% confidence interval for the population mean…

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Q: Thirty randomly selected students took the calculus final. If the sample mean was 74.2 and the…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 74.2 Standard deviation (s) =…

Q: You want to estimate the average and standard deviation for the distance each person at your job…

A: the given  values are sample mean = X =74.12 sample standard deviation = S = 10.20 sample size = n…

Q: Which of the following indicates a confidence interval? a. 0.95              b.99%               c.…

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Q: State the appropriate null and altemate hypotheses. Ho This hypothesis test is a (Choose one) test.…

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Q: Suppose that you are preparing to construct a 98% confidence interval for the population mean.  You…

A: Given Data : Sample Size, n = 27 Sample Mean, x̄ = 29.5 standard deviation,…

Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…

A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25

Q: Keisha wants to estimate the percentage of managers at her company that hold an MBA. She surveys 320…

A: Givensample size(n)=320x=72sample proportion(p^)=xn=72320=0.225confidence level=90%

Q: you take a sample in equal 25 of test scores from a population. The sample mean is 38, and the…

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Q: Many college admissions want to know your class percentage in addition to your grades.  The grades…

A: Consider that a random variable x, defines the grades.

Q: ou are given the smaple mean and the population m standard deviation. Use this info to construct the…

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Q: Determine the 95% confidence interval for the mean predicted when x= 7 b. Determine the 95%…

A: Confidence interval are used to estimate the range where the true value of the parameter lies.…

Q: Suppose the weight of dogs is normally distributed with a mean of 35 pounds and a standard deviation…

A: We have to find z score for given data..

Q: A sociologist develops a test to measure attitudes about public transportation, and 27 randomly…

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Q: You get a random sample of 30 students, and you give them an Anxiety inventory called Form A. Below…

A: We have given scores of random samples of  students as follows: Form…

Q: d the mean and standard deviation of the number of red-headed Scots in a randomly selected group of…

A: Let X be the random variable from binomial distribution with probability of  red hair for Scottish…

Q: Use the t-table or any statistical tool and report the t-score that you multiple by the standard…

A: Excel: The confidence level is 95%. Sample size is 5. Degrees of freedom is 5-1= 4. The t-score can…

Q: Statistics students surveyed 135 students at Tallahassee Community College. From their data we are…

A: Given info: Statistics students surveyed 135 students at Tallahassee Community College. From their…

Q: The principal randomly selected six students to take an aptitude test. Their scores were: 81.6 72.0…

A: Given n=6 Standard deviation=6.47

Q: Four students are instructed to calculate a confidence interval based on the same sample mean (xbar:…

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Q: Toby wants to know the average price of new cars at a particular dealearship. He randomly selects a…

A: We have given that  Sample size=n=31 Mean=xbar=19500 Standard deviation=S=1640 95% confidence…

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.