Question

Consider the following sample data with mean and standard deviation of 16.0 and 6.8, respectively. (You...

Consider the following sample data with mean and standard deviation of 16.0 and 6.8, respectively. (You may find it useful to reference the appropriate table: chi-square table or F table)

Class Frequency
Less than 10 35
10 up to 20 87
20 up to 30 66
30 or more 22
n = 210

b-1. Calculate the value of the test statistic. (Round the z value to 2 decimal places, all other intermediate values to at least 4 decimal places and final answer to 3 decimal places.)

Math   Statistics-And-Probability   
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Answer #1

Solution:

We have to find the expected frequencies first.

We are given that:

Now, using the normal distribution the expected frequencies are:

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