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Acurate Sample size

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A "random survey" was conducted of 3274 people of the "microprocessor generation" (people born since 1971, the year the microprocessor were invented). It was reported that 48% of those

individuals surveyed stated that if they had $2000 to spend, they would use it for computer equipment. Also, 66% of those surveyed considered themselves relatively savvy computer users.

(Source: San Jose Mercury News)

a. Do you consider the sample size large enough for a study of this type? Why or why not?

Based on your "gut feeling," do you believe the percents accurately reflect the U.S. population for those individuals born since 1971? If not, do you think the percents of the population are actually higher or lower than the sample statistics? Why?

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Hi,

Sample size
A "random survey" was conducted of 3274 people of the "microprocessor generation" (people born since 1971, the year the microprocessor were invented). It was reported that 48% of those individuals surveyed stated that if they had $2000 to spend, they would use it for computer equipment. Also, 66% of those surveyed considered themselves relatively savvy computer users.
(Source: San Jose Mercury News)

a. Do you ...

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Compare the data from the first 10 days to the last 5 days

20, 10, 17, 20, 60, 0, 30, 0, 0, 0, / 15, 15, 30, 25, 18
Is the larger sample changing anything?

Is your mean increasing or decreasing?

Do you think the current sample you have is enough to paint an accurate picture, or do you need a much larger sample?

Now using Excel, prepare a frequency distribution from the following data

20, 10, 17, 20, 60, 0, 30, 0, 0, 0

Calculate the Standard Deviation of your data.

Is this a normal distribution?

What are the implications?

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