A random sample of leading companies in South Korea gave the following percentage yields based on assets. 2.4 2.1 4.7 1.9 0.3 3.6 2.4 0.2 1.7 1.8 1.4 5.4 1.1 Use a calculator to verify that s2 ≈ 2.374 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 3.2 1.8 3.3 2.8 2.3 3.5 2.8 Use a calculator to verify that s2 ≈ 0.361 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?   (b) Find the value of the sample F statistic. (Use 2 decimal places.) What are the degrees of freedom? dfN   dfD

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A random sample of leading companies in South Korea gave the following percentage yields based on assets.

2.4 2.1 4.7 1.9 0.3 3.6 2.4
0.2 1.7 1.8 1.4 5.4 1.1

Use a calculator to verify that s2 ≈ 2.374 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 3.2 1.8 3.3 2.8 2.3 3.5 2.8

Use a calculator to verify that s2 ≈ 0.361 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?
 

(b) Find the value of the sample F statistic. (Use 2 decimal places.)


What are the degrees of freedom?
dfN  
dfD  
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