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Essentials of Statistics for the B...

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

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BuyFindarrow_forward

Essentials of Statistics for the B...

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

One sample has a mean of M = 5 and a second sample has a mean of M = 10. The two samples are combined into a single set of scores.

  1. a. What is the mean for the combined set if both of the original samples have n = 5 scores?
  2. b. What is the mean for the combined set if the first sample has n = 4 scores and the second sample has n = 6?
  3. c. What is the mean for the combined set if the first sample has n = 6 scores and the second sample has n = 4?

a.

To determine

To Find: The mean for the combined set when n1=n2=5

Explanation

Given info:

Mean for two samples are 5 and 10 respectively.

Calculation:

Calculate sum of scores, X1 and X2 for the two samples as:

X1=n1×M1=5×5=25

Similarly,

X2=n2×M2=5×10=50

The formula for combined mean is:

b.

To determine

To Find: The mean for the combined set when n1=4,n2=6

c.

To determine

To Find: The mean for the combined set when n1=6,n2=4

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