russellc, September 19, 2018September 19, 2018, Statistics, 0 Pequals=0.2709 Pequals=0.0793 Pequals=0.0286 Pequals=0.0143 see excel spreadsheet. This your answer This answer is locked! Login To See This Answer. Registration is free! Username:Password:RegisterLost your password?

A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.05 in. (a) Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 0.20 in. (b) Repeat part (a) using a population standard deviation of 0.40 in. Which standard deviation requires a larger sample size? Explain. russellc, September 12, 2018September 14, 2018, Statistics, 0

In a survey of 641 males ages 18-64, 394 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals. The 90% confidence interval for the population proportion p is The 95% confidence interval for the population proportion p is Interpret your results of both confidence intervals. Which interval is wider? russellc, September 13, 2018September 14, 2018, Statistics, 0

Determine whether the claim stated below represents the null hypothesis or the alternative hypothesis. If a hypothesis test is performed, how should you interpret a decision that (a) rejects the null hypothesis or (b) fails to reject the null hypothesis? A scientist claims that the mean incubation period for the eggs of a species of bird is less than 57 days. russellc, September 19, 2018September 19, 2018, Statistics, 0 see excel spreadsheet. This your answer

The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. russellc, September 13, 2018September 14, 2018, Statistics, 0

Find the minimum sample size n needed to estimate p for the given values of c, a, and E. russellc, September 12, 2018September 14, 2018, Statistics, 0 c = 0.90. a = 9.9. and E = 2 Answer = 67

A nutritionist claims that the mean tuna consumption by a person is 3.9 pounds per year. A sample of 60 people shows that the mean tuna consumption by a person is 3.5 pounds per year. Assume the population standard deviation is 1.11 pounds. At alpha equals 0.1, can you reject the claim? russellc, September 19, 2018September 19, 2018, Statistics, 0 see excel spreadsheet. This your answer

The table shows the results of a survey in which separate samples of 400 adults each from the East, South, Midwest, and West were asked if traffic congestion is a serious problem in their community. Complete parts (a) and (b). (a) Construct a 95% confidence interval for the proportion of adults from the WestWest who say traffic congestion is a serious problem. russellc, September 13, 2018September 15, 2018, Statistics, 0

Use the given confidence interval to find the margin of error and the sample mean. (13.6,22.8) russellc, September 13, 2018September 14, 2018, Statistics, 0