A random sample of leading companies in South Korea gave the following percentage yields based on assets. 2.7 1.7 4,4 1.1 0.1 3.6 2.4 0.2 1.7 1.8 1.4 5.4 1.1 Use a calculator to verify that s = 2.449 for these South Korean companies. Another random sample of leading companies in Sweden gave the following percentage yields based on assets. 2.1 3.3 3.1 1.6 3.4 2.8 2.3 3.5 2.8 Use a calculator to verify that s? s 0.420 for these Swedish companies. Test the claim that the population variance of percentage yields on assets for South Korean companies is higher than that for companies in Sweden. Use a 5% level of significance. How could your test conclusion relate to an economist's question regarding volatility of corporate productivity of large companies in South Korea compared with those in Sweden? (a) What is the level of significance? State the null and alternate hypotheses. O H;: 0,? = 0,²; H;: 01 > 0, O H,: 0, > 0,²; H,: 0,2 = 0,2 O Ho: 0,? = 0,?; H;: 0,² > o,? O H,: 0,? = 0,²; H,: 0,? + 0,? (b) Find the value of the sample F statistic. (Use 2 decimal places.) What are the degrees of freedom? dfo What assumptions are you making about the original distribution? O The populations follow dependent normal distributions. We have random samples from each population. The populations follow independent chi-square distributions. We have random samples from each population. O The populations follow independent normal distributions. We have random samples from each population. The populations follow independent normal distributions. (c) Find or estimate the P-value of the sample test statistic.
A random sample of leading companies in South Korea gave the following percentage yields based on assets. 2.7 1.7 4,4 1.1 0.1 3.6 2.4 0.2 1.7 1.8 1.4 5.4 1.1 Use a calculator to verify that s = 2.449 for these South Korean companies. Another random sample of leading companies in Sweden gave the following percentage yields based on assets. 2.1 3.3 3.1 1.6 3.4 2.8 2.3 3.5 2.8 Use a calculator to verify that s? s 0.420 for these Swedish companies. Test the claim that the population variance of percentage yields on assets for South Korean companies is higher than that for companies in Sweden. Use a 5% level of significance. How could your test conclusion relate to an economist's question regarding volatility of corporate productivity of large companies in South Korea compared with those in Sweden? (a) What is the level of significance? State the null and alternate hypotheses. O H;: 0,? = 0,²; H;: 01 > 0, O H,: 0, > 0,²; H,: 0,2 = 0,2 O Ho: 0,? = 0,?; H;: 0,² > o,? O H,: 0,? = 0,²; H,: 0,? + 0,? (b) Find the value of the sample F statistic. (Use 2 decimal places.) What are the degrees of freedom? dfo What assumptions are you making about the original distribution? O The populations follow dependent normal distributions. We have random samples from each population. The populations follow independent chi-square distributions. We have random samples from each population. O The populations follow independent normal distributions. We have random samples from each population. The populations follow independent normal distributions. (c) Find or estimate the P-value of the sample test statistic.
Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
Publisher:Bruce Crauder, Benny Evans, Alan Noell
Chapter4: Exponential Functions
Section4.4: Modeling Nearly Exponential Data
Problem 3E: Special Rounding Instructions For this exercise set, round all regression parameters to three...
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