A clinical test trial tests a method designed to increase the probability of con
ID: 2929566 • Letter: A
Question
A clinical test trial tests a method designed to increase the probability of conceiving a girl. In the study 280 babies were born, and 252 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective?
__________< p < __________ (Round to three decimal places as needed.)
Does the method appear to be affective?
Yes, the proportion of girls is significantly different from 0.5.
No, the proportion of girls is not significantly different from 0.5.
Explanation / Answer
The statistical software output for this problem is:
One sample proportion summary confidence interval:
p : Proportion of successes
Method: Standard-Wald
99% confidence interval results:
Hence,
99% confidence interval will be:
0.854 < p < 0.946
Yes, the proportion of girls is significantly different from 0.5.
Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit p 252 280 0.9 0.017928429 0.85381943 0.94618057Related Questions
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