A sample of 300 babies born at a hospital is surveyed.
A sample of 300 babies born at a hospital is surveyed. 85% are born on or after their due date. What is the margin of error at a 90% confidence error?
±2.1%
±4.0%
±3.4%
±5.3%
Homework Answers
1. z value for 90% CI is 1.645 as
P(-1.645 n=300 and p=0.85 So Margin of Error is Hence correct answer here is 
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47) The weights (in pounds) of a random sample of 32 new born babies, born at...
47) The weights (in pounds) of a random sample of 32 new born babies, born at a particular 47) hospital are given below. Find the 95% confidence interval for the mean weight of the population of new born babies borm at this hospital. 7.5 6.4 7.1 7.1 6.8 8.6 74 6.4 74 7.0 6.0 7.8 9.0 7.3 6.5 5.8 8.4 7.6 7.2 6.5 8.5 7.1 6.3 6.9 7.0 5.9 8.3 6.6 73 77 6.4 8.2
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5.7.2 A hospital administrator wishes to estimate the mean weight of babies born in her hospital. How large a sample of birth records should be taken if she wants a 95% confidence interval that is 1 pound wide? Assume that a reasonable estimate of s is 1 pound. What if she wanted to be 99% certain? Compute the sample size for that as well.
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Suppose babies born in a large hospital have a mean weight of 3242 grams, and a standard deviation of 446 grams. if 107 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would be less than 3285 grams Round your answer to four decimal places
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A hospital claims that the proportion, P, of full-term babies born in their hospital that weigh...
A hospital claims that the proportion, P, of full-term babies born in their hospital that weigh more than 7 pounds is 37%. In a random sample of 185 babies born In this hospital, 79 weighed over 7 pounds. Is there enough evidence to reject the hospital's claim at the 0.05 level of significance? Perform a two-talled test. Then fill in the table below. Carry your Intermediate computations to at least three decimal places and round your answers as specified in...
1000 Assessment 50 99% 2.57 Confidence Level 90% 95% Z-Score 1.65 1.96 A sample of 300 babies born at a hospital is surveyed. 85% are born on or after their due date. What is the margin of error at a 90% confidence error? 2.1% 8 5 2 +4.0% +3.4% 5.3% Ins 2. For a survey of 700 people in which 48% show support for an upcoming vote on a proposed constitutional amendment, what would be the margin of error at...
47) The weights (in pounds) of a random sample of 32 new born babies, born at a particular 47) hospital are given below. Find the 95% confidence interval for the mean weight of the population of new born babies borm at this hospital. 7.5 6.4 7.1 7.1 6.8 8.6 74 6.4 74 7.0 6.0 7.8 9.0 7.3 6.5 5.8 8.4 7.6 7.2 6.5 8.5 7.1 6.3 6.9 7.0 5.9 8.3 6.6 73 77 6.4 8.2
Suppose babies born in a large hospital have a mean weight of 3242 grams, and a standard deviation of 446 grams. if 107 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would be less than 3285 grams Round your answer to four decimal places
A hospital claims that the proportion, p, of full-term babies born in their hospital that weigh more than 7 pounds is 41%. In a random sample of 235 babies born in this hospital, 114 weighed over 7 pounds. Is there enough evidence to reject the hospital's claim at the 0.1 level of significance? Perform a two-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in...
A hospital claims that the proportion, P, of full-term babies born in their hospital that weigh more than 7 pounds is 37%. In a random sample of 185 babies born In this hospital, 79 weighed over 7 pounds. Is there enough evidence to reject the hospital's claim at the 0.05 level of significance? Perform a two-talled test. Then fill in the table below. Carry your Intermediate computations to at least three decimal places and round your answers as specified in...
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