For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of technology companies (IBM, Hewlett-Packard, Intel, and others) gave the following information.Technology companies, % foreign revenue: x1; n1 = 1662.855.747.059.655.341.065.151.153.450.848.544.649.461.239.341.8Another independent random sample of basic consumer product companies (Goodyear, Sarah Lee, H.J. Heinz, Toys 'R' Us) gave the following information.Basic consumer product companies,% foreign revenue: x2; n2 = 1728.030.534.250.311.128.840.044.940.760.123.121.342.818.036.928.032.5(Reference: Forbes Top Companies.) Assume that the distributions of percentage foreign revenue are mound-shaped and symmetric for these two company types.(a) Calculate x1, s1, x2, and s2. (Use 2 decimal places.)x1 %s1 %x2 %s2 %(b) Let ?1 be the population mean for x1 and let ?2 be the population mean for x2.Find 93% confidence interval for ?1 – ?2. (Use 2 decimal places.)lower limit %upper limit %

Name: For large U.S. companies, what percentage of their total income comes
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Description: For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of technology companies (IBM, Hewlett-Packard, Intel, and others) gave the following information.Technology companies, % foreign revenue: x1; n1

x1 =51.6625 s1 = 7.9277 x2 = 33.6 s2 = 12.2572

Answered: eference: Forbes Top Companies.) Assume…

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For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of technology companies (IBM, Hewlett-Packard, Intel, and others) gave the following information.

Technology companies, % foreign revenue: x₁; n₁ = 16
62.8	55.7	47.0	59.6	55.3	41.0	65.1	51.1
53.4	50.8	48.5	44.6	49.4	61.2	39.3	41.8

Another independent random sample of basic consumer product companies (Goodyear, Sarah Lee, H.J. Heinz, Toys 'R' Us) gave the following information.

Basic consumer product companies,% foreign revenue: x₂; n₂ = 17
28.0	30.5	34.2	50.3	11.1	28.8	40.0	44.9
40.7	60.1	23.1	21.3	42.8	18.0	36.9	28.0
32.5

(Reference: Forbes Top Companies.) Assume that the distributions of percentage foreign revenue are mound-shaped and symmetric for these two company types.

(a) Calculate x₁, s₁, x₂, and s₂. (Use 2 decimal places.)

x₁	%
s₁	%
x₂	%
s₂	%

(b) Let ?₁ be the population mean for x₁ and let ?₂ be the population mean for x₂.
Find 93% confidence interval for ?₁ – ?₂. (Use 2 decimal places.)

lower limit	%
upper limit	%

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