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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

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Chapter
Section
BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

a. Sketch a histogram showing the frequency distribution for the following sample of n = 5 scores: 3, 1, 9, 4, 3. Locale the mean in your sketch, and estimate the value of the sample standard deviation.

b. Calculate SS, variance, and standard deviation for this sample. How well does your estimate from part a compare with the real standard deviation?

(a)

To determine

To draw: The histogram for the frequency distribution of sample scores.

Explanation

Given info:

The sample scores are 3, 1, 9, 4 and 3.

Construction of histogram:

Software procedure:

Step-by-step procedure for constructing histogram by using excel procedure:

  • Enter data in to data Excel sheet.
  • Select Mega Stat option from Add-Ins menu.
  • Select Quantitative from Frequency Distributions.
  • Select Input range and choose Histogram.
  • Click Ok.

Calculating the standard deviation:

The mean of the sample scores is,

M=xin=3+1+9+4+35=4

The standard deviation of the sample score is,

s=

(b)

To determine

To find: The sum of squared deviations, variance and standard deviation for the sample of scores.

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