Question

The medical records of infants delivered at kaiser memorial hospital show that the infants’ birth weights...

The medical records of infants delivered at kaiser memorial hospital show that the infants’ birth weights are approximately normally distributed with a mean of 7.4 lbs. and a standard deviation of 1.2 lbs. a. find the birth weight at the 80 percentile b. At what percentile does a 7.0 pound infant lie?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A nurse at a local hospital is interested in estimating the birth weight of infants. How...
A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must they select if they want to be 99% confident that the true mean is within 2.25 ounces of the sample mean? The standard deviation of the birth weights is known to be 6.02 ounces, and birth weights are approximately normally distributed.
Suppose that the birth weights of infants are Normally distributed with mean 120 ounces and a...
Suppose that the birth weights of infants are Normally distributed with mean 120 ounces and a standard deviation of 18 ounces. (Note: 1 pound = 16 ounces.) a) Find the probability that a randomly selected infant will weight less than 5 pounds. b) What percent of babies weigh between 8 and 10 pounds at birth? c) How much would a baby have to weigh at birth in order for him to weight in the top 10% of all infants? d)...
Using all 1991 birth records in the computerized national birth certificate registry compiled by the National...
Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric (“Are babies normal?” The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the “typical” 37–43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of...
Using all 1991 birth records in the computerized national birth certificate registry compiled by the National...
Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric (“Are babies normal?” The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the “typical” 37–43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of...
A nurse at a local hospital is interested in estimating the birth weight of infants. How...
A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is within 2 ounces of the sample mean? The standard deviation of the birth weights is known to be 5 ounces.
A doctor at a local hospital is interested in estimating the birth weight of infants. How...
A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 98% confident that the true mean is within 2 ounces of the sample mean? The standard deviation of the birth weights of a recent sample is known to be 8 ounces.
A random sample of 24 recent birth records at the local hospital was selected. In the...
A random sample of 24 recent birth records at the local hospital was selected. In the sample, the average birth weight was 119.6 ounces. Population standard deviation was 6.7 ounces. Assume that in the population of all babies born in this hospital, the birth weights follow a Normal distribution, with mean μ. A 95% confidence interval for the population mean birth weight based on these data is
The mean birth weight of babies at University of Maryland Hospital is 3152.0 g with a...
The mean birth weight of babies at University of Maryland Hospital is 3152.0 g with a standard deviation of 693.4 g. a. Low birth weight babies need extra medical care, and the hospital does special screening on babies below the 15th percentile of weights. Below what weight should babies receive the extra screening? b. For high birth weights, the hospital screens the mothers for gestational diabetes. What is the cut off weight for the top 10% of babies? c. What...
Suppose birth weights of human babies are normally distributed with a mean of 120 ounces and...
Suppose birth weights of human babies are normally distributed with a mean of 120 ounces and a stdev of 16 ounces (1lb = 16 ounces). 1. What is the probability that a baby is at least 9 lbs 11 ounces? 2. What is the probability that a baby weighs less than 10 lbs (160 ounces)? 3. What weight is the 90th percentile?
A hypothesis regarding the weight of newborn infants at a community hospital is that the mean...
A hypothesis regarding the weight of newborn infants at a community hospital is that the mean is 6.6 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0, 7.3, 6.0, 8.8, 6.8, 8.4, and 6.6 pounds. When evaluated using the 5% level of significance, which of the following would be the best decision/interpretation of the null hypothesis? A. Fail to reject the null hypothesis. B. Reject the null hypothesis and conclude the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT