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Calculate the mean for this population. Calculate the sampling error using the first four games in the first row as your sample. Calculate the sampling error using all eight games in the first row.
A repeated-measures study comparing two treatments with n = 4 participants produces MD = 2 and SS = 75 for the difference scores. What is the estimated standard error for the sample mean difference
The second subsystem consists of two components in parallel. The components in subsystem 1 are all of the same design and each has a 1/10,000 chance of failure. The parallel components each has a 3/
Assuming these 190 nights represent the population of all nights in this police precinct, what do you estimate the probability is that on a randomly selected night, there will be from 25 to 29 (incl
Assume the 67% of the cars on a particular freeway are traveling faster than 70 miles per hour. A random sample of 15 cars was observed under normal driving conditions with no police car in sight. W
the slope of the regression line and test if it differs significantly from zero. the 95% confidence interval for the slope.
In a simple random sample of 36 families in a certain country, you find that sample mean income to be $9,500 with a sample standard deviation of $2,500. Run a hypothesis test (?=.05) to test whether
One-tail hypothesis, testing the claim that the true mean is 36 lb? Explain how the tail, upper or lower, is dictated by the point estimate. Two-tail hypothesis, testing the claim that the true mean
The following table was presented in an article summarizing a study to compare a new drug to a standard drug and to a placebo.
Give a 90% confidence interval for Leroy's free-throw success probability for the new season. Are you convinced that he is now a better free-throw shooter than last season?
What is the Taguchi constant for a device that costs $400 to repair and a tolerance of plus or minus 0.5 mm with a mean squared deviation from the target of 0.3?
What are the conditions for using the standard deviation formula when conducting a significance test? Be specific about p versus p-hat. Part 2: What are the conditions for approximating with a norma
What are the conditions for using the standard deviation formula when conducting a significance test? Be specific about p versus p-hat.
Calculate the posterior probability that . (You can use the results in (b)). 2? ? Find the expected value of the posterior distribution.
Paul is conducting a study on the dollar value of orders placed with various suppliers. A sample of 10 orders showed amounts in thousands of dollars of 43.6, 61.3, 54, 70.7, 46, 56.3, 58.8, 73.7, 4
A Gallup Poll used telephone interviews to survey a sample of 1025 U.S. residents over the age of 18 regarding their use of credit cards. The poll reported that 76% of Americans said that they had a
In a survey of 9000 females. 6431 say they change their nail polish once a week. Construct 90% and 95% confidence intervals for the population proportion,. Interperet the results and compare the wid
A table gives the number of medical doctors per 100,000 people for each of the 50 states. It does not make sense to use the t procedures (or any other statistical procedures) to give a 95% confidenc
Your local newspaper contains a large number of advertisements for unfurnished one-bedroom apartments. You choose 10 at random and calculate that their mean monthly rent is $540 and that the standar
When sample data actually occur in pairs, an advantage of a paired t-test is that it tends to increase the power of a test (as compared to treating each sample independently).
Find the sample mean. Find the sample standard deviation. Construct a 90% confidence interval for the population mean u.
Just recently a study was conducted by Atlas Research to determine if there was a difference in humor content in coal and natural gas trade magazinze ads. In an indeoendent random sample of 400 coal
A regional survey of 100 homes sold recently revealed that the mean selling time was 94 days with a standard of 22 days. At a .1 signifigance level, can we conclude that the mean selling time has i