document.write( "Question 871840: A random sample of 200 students at UCLA shows that 120 of them have internet access. Test the claim that
\n" ); document.write( "the true population proportion of students at UCLA who have internet access is more than 55%. Use 3% level of
\n" ); document.write( "significance. Use the P-Value method. \n" ); document.write( "
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A random sample of 200 students at UCLA shows that 120 of them have internet access.
\n" ); document.write( "Test the claim that the true population proportion of students at UCLA who have internet access is more than 55%.
\n" ); document.write( "Use 3% level of significance. Use the P-Value method.
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\n" ); document.write( "Ho: p <= 0.55
\n" ); document.write( "Ha: p > 0.55 (claim)
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\n" ); document.write( "test statistic:: z(120/200) = (0.6-0.55)/sqrt[0.55*0.45/200] = 1.4213
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\n" ); document.write( "p-value = P(z > 1.4213) = normalcdf(1.4213,100) = 0.078
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\n" ); document.write( "Conclusion:: Since the p-value is greater than 3%, fail to reject Ho.
\n" ); document.write( "Conclusion:: The test results do no support the claim.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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