russellc, September 12, 2018September 14, 2018, Statistics, 0 c = 0.95. x = 9.2. a = 0.4. and n = 59 A 95% confidence interval for p is (9.10.9.30). This answer is locked! Login To See This Answer. Registration is free! Username:Password:RegisterLost your password?

A random sample of 75 eighth grade students’ scores on a national mathematics assessment test has a mean score of 278. This test result prompts a state school administrator to declare that the mean score for the state’s eighth graders on this exam is more than 275. Assume that the population standard deviation is 36. At alphaequals0.12, is there enough evidence to support the administrator’s claim? Complete parts (a) through (e). russellc, September 19, 2018September 19, 2018, Statistics, 0 see excel spreadsheet. This your answer

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

Find the margin of error for the given values of c, s, and n. c equals=0.95 s equals=66, n equals=12 russellc, September 13, 2018September 14, 2018, Statistics, 0

or the statement below, write the claim as a mathematical statement. State the null and alternative hypotheses and identify which represents the claim. The standard deviation of the base price of a certain type of all-terrain vehicle is equal to $305. russellc, September 19, 2018September 19, 2018, Statistics, 0 Part A is just stating the the claim numberically with is u =305. Part B = Ho is the...

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

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

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

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