Using The Chi-Square Distribution Table, =σ2225, =α0.10, =n21, and a two-tailed test, find the following: State the hypotheses. Claim or not a claim Critical Value
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Using The Chi-Square Distribution Table, =σ2225, =α0.10, =n21, and a two-tailed test, find the following:
State the hypotheses.
Claim or not a claim
Critical Value
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- Using The Chi-Square Distribution Table, σ2=225 , α=0.05, n=23, and a two-tailed test, find the following: (a)State the hypotheses. :H0 :H1 (b)Find the critical value. Enter the answers in ascending order and rounded to at least three decimal places. Critical values are ___ and ___Use technology to construct the confidence intervals for the population variance sigmaσsquared2 and the population standard deviation sigmaσ. Assume the sample is taken from a normally distributed population. c=0.98, s=39, n=18Use technology to construct the confidence intervals for the population variance σ2 and the population standard deviation σ. Assume the sample is taken from a normally distributed population. c=0.90, s=34, n=17
- Provided below are summary statistics for independent simple random samples from two populations. Use the pooled t-test and the pooled t-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval. x₁ = 11, S₁ = 2.5, n₁ = 15, x₂ = 14, s₂ = 2.2, n₂ = 15 a. Two-tailed test, α = 0.10 b. 90% confidence interval Ha: H1 H2 Next, compute the test statistic. t= (Round to three decimal places as needed.) Now determine the critical values. ±ta/2= ± What is the conclusion of the hypothesis test? Since the test statistic b. The 90% confidence interval is from to (Round to three decimal places as needed.) (Round to three decimal places as needed.) in the rejection region, Ha: H1 = H₂ Ho. Time Remaining: 01:35:24 NextExpress the confidence interval (33.6 % , 42.4 % ) in the form of p ± E.If a hypothesis test were to be performed, in which of the following contexts would a t-test be appropriate? Select the correct answer below: O A simple random sample of 29 books is taken from a public library and the lengths (pages) were collected. The sample mean is 166 pages and the population standard deviation is 27 pages. O A sample mean of 30 pounds and a sample standard deviation of 5 pounds are obtained using a simple random sample of 27 dogs from the dogs within a county, which have approximately normally distributed weights. O A sample mean of 31,994 dollars and a standard deviation of 4,658 dollars are obtained using a simple random sample of 22 individuals from the residents of a town having approximately normally distributed incomes. The population standard deviation is 3,959.3 dollars. 0 A convenience sample of 16 vehicles is taken from a large group of vehicles with approximately normally distributed fuel consumption rates. The sample mean is 20 miles per gallon and the…
- Use technology to construct the confidence intervals for the population variance sigmaσsquared2 and the population standard deviation sigmaσ. Assume the sample is taken from a normally distributed population. c=0.98, s=39, n=18Nine students took the SAT. Their scores are listed below. Later on, they read a book on test preparation and retook the SAT. Their new scores are listed below. Assume that the distribution is normally distributed. 1. Can it be concluded at α = .05 that the scores have changed? Do the hypothesis test. 2. Construct a 95% confidence interval for μd. Student 1 2 3 4 5 6 7 8 9 Before Reading 720 860 850 880 860 710 850 1200 950 After Reading 740 860 840 920 890 720 840 1240 970Use technology to construct the confidence intervals for the population variance σ2 and the population standard deviation σ. Assume the sample is taken from a normally distributed population. c=0.99, s2=19.36, n= 25
