The standard deviation for a population is σ=7.47. A random sample selected from this population gave a mean equal to 49.63. Construct a 95% confidence interval for μ assuming n=100. Round...

The standard deviation for a population is σ=7.47. A random sample selected from this population gave a mean equal to 49.63. Construct a 95% confidence interval for μ assuming n=100. Round...

round to nearest thousandth

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. When 332 college students are randomly selected and surveyed, it is...

Express the confidence interval -0.129 < p < 0.631 in the form of ± E.

I am auditing 30 charts for quality documentation. If for one specific question, only 2 of the 30 charts apply and 0/2 charts meet the requirements, is this statistically significant? Please...

If I obtain a score of 100 on a test that has a mean of 120 and a standard deviation of 10, what is my standard score? What would be my T score (mean of 50 and standard deviation of 10)?

An alpha level of 0.05 means what? What about an alpha level of 0.01, 0.001, 0.10, and 0.20?

Which county had the highest median income between 2006 to 2010? The answer is Los Angeles. I have a real data, how do I turn this question to a hypothesis and which test do I use?

Students in a college course take a common final exam. The exam scores are normally distributed with a mean of 76 and a standard deviation of 8. Bob scored an 88 and Tom scored a 69. a...

1) Suppose you buy 1 ticket. What is the probability that the ticket you buy is the winning ticket? (Assume that all 2500 tickets are sold.) 2) After thinking about the prize, you decide...

The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the data to construct a 95% confidence interval estimate of the mean duration of...

Suppose a basketball player has made 390 out of 434 free throws. If the player makes the next 2 free throws, I will pay you $40. Otherwise you pay me $169. Step 1 of 2: Find the expected...

The question on the study guide is as follows: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Joe has an IQ that is higher than 99% of people. What...

a student takes a sample of n=30 books and records the publication date for each. The sample produces an average of M=23.8 years with a variance of s square=67.5. Use this sample to conduct a...

True or False. If you have a volunteer sample instead of a random sample, then a confidence interval for population proportion parameter is still completely reliable as long as the sample size is...

True or False. As sample size increses, the law of large numbers guarantees the convergence of a statistic at the population parameter value

True or False. Random assignment of subjects to treatments in a statistical experiment guarantees a causal interpretation of the results.

An interactive poll found that 362 of 2,243 adults aged 18 or older have at least one tattoo. (a) Obtain a point estimate for the proportion of adults who have at least one tattoo. (b) Construct...

I don't understand how you do this math problem.

Local health authorities are concerned that the hectic pace in their city has elevated the stress, and thus the blood pressure of women. The authorities have decided to study this issue by measuring...

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