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【正文】 Exploring Marketing Research William G. Zikmund Chapter 17: Determining Sample Size Copyright 169。 2022 by Harcourt, Inc. All rights reserved. What does Statistics Mean? ? Descriptive Statistics – Number of People – Trends in Employment – Data ? Inferential Statistics – Make an inference about a population from a sample Population Parameter Versus Sample Statistics Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Population Parameter ? Variables in a population ? Measured characteristics of a population ? Greek lowercase letters as notation Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Sample Statistics ? Variables in a sample ? Measures puted from data ? English letters for notation Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Making Data Usable ? Frequency Distributions ? Proportions ? Central Tendency – Mean – Median – Mode ? Measures of Dispersion Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Frequency Distribution of Deposits Frequency (number of people making deposits Amount in each range) less than $3,000 499 $3,000 $4,999 530 $5,000 $9,999 562 $10,000 $14,999 718 $15,000 or more 811 3,120 Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Amount Percent less than $3,000 16 $3,000 $4,999 17 $5,000 $9,999 18 $10,000 $14,999 23 $15,000 or more 26 100 Percentage Distribution of Amounts of Deposits Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Amount Probability less than $3,000 .16 $3,000 $4,999 .17 $5,000 $9,999 .18 $10,000 $14,999 .23 $15,000 or more .26 Probability Distribution of Amounts of Deposits Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Measures of Central Tendency ? Mean Arithmetic Average – 181。, population。
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