# Question

A simple random sample is to be taken of 527 business majors in a college to estimate the proportion favoring greater emphasis on business ethics in the curriculum. How many observations are necessary to ensure that a 95% confidence interval for the population proportion extends at most 0.06 on each side of the sample proportion?

## Answer to relevant Questions

Show algebraically that Equation 7.23 is equal to Equation 7.24. That is, It is known that the standard deviation in the volumes of 20-ounce (591-millliliter) bottles of natural spring water bottled by a particular company is 5 millliliters. One hundred bottles are randomly sampled and ...Find the LCL and UCL for each of the following. a. α = 0.05; n = 25; x-bar = 560; s = 45 b. α/2 = 0.05; n = 9; x-bar = 160; s2 = 36 c. 1 - α = 0.98; n = 22; x-bar = 58; s = 15 A business school placement director wants to estimate the mean annual salaries 5 years after students graduate. A random sample of 25 such graduates found a sample mean of $42,740 and a sample standard deviation of $4,780. ...Consider again the Mendez Mortgage Company case study in Chapter 2. From a random sample of n = 350 accounts of the company's total portfolio, estimate with 95% confidence the proportion of all the company's accounts in ...Post your question

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