Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim thatthe variation of maximal skull breadths in 4000 B.C. is the same as the variption in A.D. 150.Given:sample 1: n = 30, a =131.28, s = 5.16%3D%3Dsample 2: n = 30, a136.13, s = 5.36%D%3DTest statistic F =(Round to two decimal places.)%3DP value is(Round to three decimal places.)

Answered: Image /qna-images/answer/1321b232-2413-4bc7-9be1-98346519c811.jpg

Answered: Assume that both samples are…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Words were displayed on a computer screen with background colors of red and blue. Results from scores on a test of word recall are given below. Use a 0.05 significance level to test the claim that the samples are from populations with the same standard deviation. Assume that both samples are independent simple random samples from populations having normal distributions. Does the background color appear to have an effect on the variation of word recall scores? Red Background Blue Background What are the null and alternative hypotheses? OA H₂:0²=0²₂2 H₁: 0²1 20²2 n X S 34 15.35 5.94 37 12.49 5.43 *C. H₂:0² = 0²/ c. H₁:0² #0²/2 Identify the test statistic. F = (Round to two decimal places as needed.) *** B. H₂:0² = 0² H₁:0² <0² OD. H₂:0² #0²/2 H₁:0² = 0²
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Only test statistic and p value... thank you
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Researchers measured skulls from different time periods in an attempt to determine whether interbreeding of cultures occurred. Results are given below. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the variation of maximal skull breadths in 4000 B.C. is the same as the variation in A.D. 150. n x s 4000 B.C. 30 131.34 mm 5.17 mm A.D. 150 30 136.45 mm 5.36 mm =/= Identify the test statistic. (Round to two decimal places as needed.) Use technology to identify the P-value. (Round to three decimal places as needed.) What is the conclusion for this hypothesis test? fail to reject/reject?
A regional manager wants to know if there is a difference between the mean amounts of time that customers wait in line at the drive‑through window for the three stores in her region. She randomly samples the wait times at each store. Her data are given in the following table. Use a one-way ANOVA test to determine if there is a difference between the mean wait times for the three stores, at the 0.050.05 level of significance. Assume the population distributions are approximately normal with equal population variances. Drive-Through Wait Times (in Minutes) Store 1 Store 2 Store 3 2.15 1.53 2.50 1.80 1.58 2.30 2.00 1.82 1.86 1.28 2.12 1.98 2.08 2.23 2.18 1.44 1.99 2.35 1.78 1.54 2.44 Copy Data Step 1 of 2 : Compute the value of the test statistic. Round any intermediate calculations to at least six decimal places, and round your final answer to four decimal places.
Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with 2.8%. A random sample of 20 Australian bank stocks has a sample mean of 8.97%. For the entire Australian stock market, the mean dividend yield is 7.3%. Do these data indicate that the dividend yield of all Australian bank stocks is higher than 7.3%? Use a=.01. Are the data statistically significant at the given level of significance? Based on your answers, will you reject or fail to reject the null hypothesis?
Test the indicated claim about the means of two populations. Assume that the two samples are randomly selected, independent, the population standard deviations are not know and not considered equal. Subjects are given a creativity exercise on a computer with either a red background or a blue background. The scores are shown in the table. At the 0.01 significance level, test the claim that blue enhances performance on a creative task. Red Background Blue Background n1 = 41 n2 = 44 xˉx̄1 = 19.2 xˉx̄2 = 18.7 s1 = 0.88 s2 = 0.35 What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)H0: Select an answer μ(blue) s₁² μ₂ p₂ p̂₁ σ₁² p μ₁ x̄₂ μ x̄₁ p₁ ? < ≥ ≠ ≤ = > Select an answer p₁ μ s₁² σ₁² μ₂ p₂ x̄₁ p̂₁ μ(red) μ₁ p x̄₂ H1: Select an answer x̄₁ x̄₂ p₁ μ₁ μ μ(blue) p p₂ σ₂² s₂² p̂₂ μ₂ ? ≤ < = ≥ ≠ > Select an answer σ₁² x̄₂ p₁ x̄₁ μ₁ p p₂ μ μ₂ p̂₁ s₁² μ(red) Original Claim = Select an answer H₁ H₀ df = Based on…
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Suppose you needed to test the claim that the two samples described below come from populations with the same mean. Assume that the samples are independent simple random samples. Sample 1: n1 13, a1 = 24, 81 = 7.55 Sample 2: n2 = 3, x2 = 21.9, 82 = 8.92 Find: (a) The estimated degree of freedom is (b) The standardized test statistic is (use Sample 1 - Sample 2)
Researchers measured skulls from different time periods in an attempt to determine whether interbreeding of cultures occurred. Results are given below. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the variation of maximal skull breadths in 4000 B.C. is the same as the variation in A.D, 150. 4000 B.C. 30 131.91 mm 5.18 mm A.D. 150 30 136.44 mm 5.36 mm O B. Ho: of ±o? H1: of = o3 O D. Hoi of = 0} O A. Ho: oi = 03 OC. Ho:o =03 H,: of 203 Identify the test statistic. F= (Round to two decimal places as needed.) Use technology to identify the P-value. The P-value is (Round to three decimal places as needed.) What is the conclusion for this hypothesis test?

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