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According to Thomson Financial, through January 25, 2006, the majority of companies reporting profits had beaten estimates (BusinessWeek, February 6, 2006). A sample of 162 companies showed 104 beat estimates, 29 matched estimates, and 29 fell short.
a. What is the point estimate of the proportion that fell short of estimates?
b. Determine the margin of error and provide a 95% confidence interval for the proportion that beat estimates.
c. How large a sample is needed if the desired margin of error is .05?
normal distribution and the sampling distributions of sample proportions and sample means, but without confidence interval
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1. Mention the characteristics of Statistics. Explain any two applications of Statistics.
what is the difference between histogram and historigram
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difference between histogram and historigram
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