A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 600 babies were​ born, and 330 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? (round to three decimal places as needed)Does the method appear to be effective?

Question
Asked Oct 29, 2019

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 600 babies were​ born, and 330 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? (round to three decimal places as needed)

Does the method appear to be effective?

check_circleExpert Solution
Step 1

Given data

n = 600

x = 330

Sample prop...

330
X
0.55
600
1 0.99 0.01
=
а
0.005
2
Zo.025
-2.5758
Confidence interval is given by
Formula to calculate the confidence interval
(1 )
2
п
0.55 x (1 0.55)
=> 0.55
2.578 x
(0.498,0.602)
600
ఇి
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330 X 0.55 600 1 0.99 0.01 = а 0.005 2 Zo.025 -2.5758 Confidence interval is given by Formula to calculate the confidence interval (1 ) 2 п 0.55 x (1 0.55) => 0.55 2.578 x (0.498,0.602) 600 ఇి

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