Question

Birth weights in the United States have a distribution that is approximately normal with a mean...

Birth weights in the United States have a distribution that is approximately normal with a mean of 3396 g and a standard deviation of 576 g. Apply Table A-2 or statistics technology you can use to answer the following questions:

(a) One definition of a premature baby is the the birth weight is below 2500 g. If a baby is randomly selected, find the probability of a birth weight below 2500 g.

(b) Another definition of a premature baby is that the birth weight is in the bottom 10%. Find the birth weight that is the cutoff between the bottom 10% and the top 90%.

(c) A definition of a "very low birth weight" is one that is less than 1500 g. If a baby is randomly selected, find the probability of a "very low birth weight".

(d) If 25 babies are randomly selected, find the probability that the mean of their mean weight is greater than 3400 g.

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
Birth weights in the United States have a distribution that is approximately normal with a mean...
Birth weights in the United States have a distribution that is approximately normal with a mean of 3396 g and a standard deviation of 576 g. Apply Table A-2 or statistics technology you can use to answer the following questions: (a) One definition of a premature baby is the the birth weight is below 2500 g. If a baby is randomly selected, find the probability of a birth weight below 2500 g. (b) Another definition of a premature baby is...
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)...
low-birth-weight babies - Researchers in Norway an- alyzed data on the birth weights of 400,000 newborns...
low-birth-weight babies - Researchers in Norway an- alyzed data on the birth weights of 400,000 newborns over a 6-year period. The distribution of birth weights is Normal with a mean of 3668 grams and a standard deviation of 511 grams.Babies that weigh less than 2500 grams at birth are classified as “low birth weight.” (a) What percent of babies will be identified as low birth weight? (b) Find the quartiles of the birth weight distribution.
Birth weights in the USA are normally distributed with mean of 3420 g and standard deviation...
Birth weights in the USA are normally distributed with mean of 3420 g and standard deviation of 495g. Find the probability that a randomly selected baby weight is between 2450g and 4390g.
Birth weights at a local hospital have a Normal distribution with a mean of 110 oz...
Birth weights at a local hospital have a Normal distribution with a mean of 110 oz and a standard deviation of 15 oz. You take a random sample of babies born at the hospital and find the mean weight. What is the probability that the mean weight will be between 111 and 114 in a sample of 50 babies born at this hospital? Round to 3 decimal places.
The distribution of weights of United States pennies is approximately normal with a mean (m) of...
The distribution of weights of United States pennies is approximately normal with a mean (m) of 2.5 grams and a standard deviation (s) of 0.03 grams. a. What is the probability that a randomly selected penny weighs less than 2.4 grams? b. Describe the sampling distribution of the mean weight of 9 randomly chosen pennies? c. What is the probability that the mean weight of 9 randomly chosen pennies is less than 2.49 grams? d. Sketch the two distributions (population...
4. Suppose the birth weights of babies in the USA are normally distributed, with mean 7.47...
4. Suppose the birth weights of babies in the USA are normally distributed, with mean 7.47 lb and standard deviation 1.21 lb. a. Find the probability that a randomly chosen baby weighed between 6.4 and 8.1 pounds. (Show work.) b. Suppose a hospital wants to try a new intervention for the smallest 4% of babies (those with the lowest birth weights). What birth weight in pounds is the largest that would qualify for this group? (Show your work.)
Birth weights of newborn babies follow a normal distribution with mean of 3.39 kg and standard...
Birth weights of newborn babies follow a normal distribution with mean of 3.39 kg and standard deviation of 0.55 kg. Use a table of Z ‑critical values to find the probability that a newborn baby weighs less than 2.125 kg. Give your answer as a percentage rounded to two decimal places. Probability:
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...
The table below gives the birth weights of five randomly selected mothers and the birth weights...
The table below gives the birth weights of five randomly selected mothers and the birth weights of their babies. Using this data, consider the equation of the regression line, yˆ=b0+b1x, for predicting the birth weight of a baby based on the mother's birth weight. Keep in mind, the correlation coefficient may or may not be statistically significant for the data given. Remember, in practice, it would not be appropriate to use the regression line to make a prediction if the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT