Question

In 1996, a reproductive clinic reported 41 live births to 162 women under the age of 38, but only 6 live births for 76 clients aged 38 and older. Is there evidence of a difference in the effectiveness of the clinic's methods for older women?

a) Test an appropriate hypothesis and state your conclusion. (Use the pooled sample proportion when checking the success/failure condition.) (Round to two decimal places as needed.)

Z =

P =

b) If you concluded there was a difference, estimate that difference with a 99% confidence interval and interpret your interval in context.

Answer #1

A reproductive clinic reported 43 live births to 207 women under
the age of 40 who had previously been unable to conceive. Complete
parts a through d below.
Find a 90% confidence interval for the success rate at this
clinic. (round to three decimal places)

A New Orleans reproductive clinic reported 57 live births to 285
women under the age of 40 who had previously been unable to
conceive.
1) What critical value is needed to find a 92% confidence
interval for the true proportion of women who conceive after
previously being unable to do so? Round final answer to two (2)
decimal places.Find and interpret this 92% confidence interval,
rounding the bounds/limits of the confidence interval to four (4)
decimal places. Suppose a researcher...

In 1998, a San Diego reproductive clinic reported 59 births to
307 women under the age of 40 who had previously been unable to
conceive. The clinic wants to cut the margin of error in half to
improve the precision of success rate. How many patients’ result,
n, must be used? Give your answer to as a whole integer. Hint: (i)
The z - critical value for a 90% confidence interval is 1.645. (ii)
Remember to always round up when...

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