An airline is considering charging a two-tiered rate for checked bags based on their weight. Before deciding at what weight to increase the rate, the airline wishes to estimate the mean weight per bag checked by passengers. It wants the estimate to be within±0.25pounds of the true population mean. A pilot sample of checked bags produced the results shown below. data:4938384233323437404440364340393649444438 a. What sample size should the airline use if it wants to have95%confidence?bSuppose the airline managers do not want to take as large a sample as the one determined in part a. What general options do they have to lower the required sample size?The sample size must be at least???.(Round up to the nearest whole number.) b. What could the managers do to lower the required sample size? Select all that apply. A.Increase the margin of error B.Use a larger pilot sample C.Reduce the level of confidence D.Increase the population standard deviation

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Description: An airline is considering charging a two-tiered rate for checked bags based on their weight. Before deciding at what weight to increase the rate, the airline wishes to estimate the mean weight per bag checked by passengers. It wants the estimate to

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MATLAB: An Introduction with Applications

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An airline is considering charging a two-tiered rate for checked bags based on their weight. Before deciding at what weight to increase the rate, the airline wishes to estimate the mean weight per bag checked by passengers. It wants the estimate to be within

±0.25

pounds of the true population mean. A pilot sample of checked bags produced the results shown below.

data:

49
38
38
42
33
32
34
37
40
44
40
36
43
40
39
36
49
44
44
38


a.	What sample size should the airline use if it wants to have 95% confidence?
b	Suppose the airline managers do not want to take as large a sample as the one determined in part a. What general options do they have to lower the required sample size?

The sample size must be at least

???.

(Round up to the nearest whole number.)

b. What could the managers do to lower the required sample size? Select all that apply.

Increase the margin of error

Use a larger pilot sample

Reduce the level of confidence

Increase the population standard deviation

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