Concept explainers
a)
To state the null and alternative hypotheses.
a)
Answer to Problem 30E
Explanation of Solution
Given:
Water temperature | |||||
Cold | Neutral | Hot | Total | ||
Hatching status | Yes | 16 | 38 | 75 | 129 |
No | 11 | 18 | 29 | 58 | |
Total | 27 | 56 | 104 | 187 |
Calculation:
The null and alternative hypotheses:
b)
To calculate expected counts.
b)
Answer to Problem 30E
Cold | Neutral | Hot | |
Yes | 18.63 | 38.63 | 71.74 |
No | 8.37 | 17.37 | 32.26 |
Explanation of Solution
Given:
Water temperature | |||||
Cold | Neutral | Hot | Total | ||
Hatching status | Yes | 16 | 38 | 75 | 129 |
No | 11 | 18 | 29 | 58 | |
Total | 27 | 56 | 104 | 187 |
Formula:
Where, r = row total, c = column total and n = grand total.
Calculation:
Therefore, expected count is,
Therefore, table of expected count is,
Cold | Neutral | Hot | |
Yes | 18.63 | 38.63 | 71.74 |
No | 8.37 | 17.37 | 32.26 |
c)
To calculate value of chi square test statistic.
c)
Answer to Problem 30E
The value of chi square test statistic is 1.7033
Explanation of Solution
Given:
Water temperature | |||||
Cold | Neutral | Hot | Total | ||
Hatching status | Yes | 16 | 38 | 75 | 129 |
No | 11 | 18 | 29 | 58 | |
Total | 27 | 56 | 104 | 187 |
Expected count is
Cold | Neutral | Hot | |
Yes | 18.63 | 38.63 | 71.74 |
No | 8.37 | 17.37 | 32.26 |
Formula:
Calculation:
Chapter 11 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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