Question

baby weights: the weight of male babies less than 2 months old in the United States...

baby weights: the weight of male babies less than 2 months old in the United States is normally distributed with mean 11.5 pounds and a standard deviation of 2.5 pounds. what portion of the babies weigh between 9 and 14 pounds?

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

Homework Answers

Answer #1

Given that, mean = 11.5 pounds

standard deviation = 2.5 pounds

We want to find, P(9 < X < 14)

Therefore, the probability that the babies weigh between 9 and 14 pounds is 0.6826

In percentage : 68.26%

Note: By empirical rule we get 68% of the babies weigh between 9 and 14 pounds (that is between 1 standard deviations of the mean.)

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
Baby weights: the weight of male babies less than 2 months old in the United States...
Baby weights: the weight of male babies less than 2 months old in the United States is normally distributed with mean 11.5 pounds and standard deviation 2.5 pounds What proportion of babies weigh more than 13 pounds? What proportion of babies weigh less than 15 pounds? What proportion of babies weigh between 9 and 14 pounds? Is it unusual for a baby to weigh more than 15 pounds? Round 4 places
Baby weights: The weight of male babies less than 2 months old in the United States...
Baby weights: The weight of male babies less than 2 months old in the United States is normally distributed with mean 12 pounds and standard deviation 3.7 pounds. Use the Cumulative Normal Distribution Table to answer the following. (a) Find the 84th percentile of the baby weights. (b) Find the 13th percentile of the baby weights. (c) Find the first quartile of the baby weights.
The weight of male babies less than 2 months old in the United States is normally...
The weight of male babies less than 2 months old in the United States is normally distributed with mean 11.4 pounds and standard deviation 2.7 pounds. (a) What proportion of babies weigh more than 14 pounds? (b) What proportion of babies weigh less than 14 pounds? (c) What proportion of babies weigh between 10 and 15 pounds? (d) Is it unusual for a baby to weigh more than 17 pounds? Round answers to four decimal places.
The weight of male babies less than 2 months old in the United States is normally...
The weight of male babies less than 2 months old in the United States is normally distributed with mean 11.8 pounds and standard deviation 2.6 pounds. (a) What proportion of babies weigh more than 15 pounds? (b) What porportion of babies weigh less than 12 pounds? (c) What proportion of babies weigh between 11 and 15 pounds? (d) Is it unusual for a baby to weigh more than 17 pounds? Round answers to four decimal places.
Question 5: Baby weights: The weight of male babies less than 2 months old in the...
Question 5: Baby weights: The weight of male babies less than 2 months old in the United States is normally distributed with mean 11.6 pounds and standard deviation 2.8 pounds. Use the TI-84 Plus calculator to answer the following. (a) What proportion of babies weigh more than 13 pounds? (b) What proportion of babies weigh less than 15 pounds? (c) What proportion of babies weigh between 9 and 13.2 pounds? (d) Is it unusual for a baby to weigh more...
Suppose that the weight of male babies less than 2 months old is normally distributed with...
Suppose that the weight of male babies less than 2 months old is normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. A sample of 36 babies is selected. What is the probability that the average weight of the sample is less than 11.13 pounds?
O Baby! The weights of 3-month-old baby girls are normally distributed with a mean of 12.9...
O Baby! The weights of 3-month-old baby girls are normally distributed with a mean of 12.9 pounds and a standard deviation of 1.6. In an inner city pediatric facility, a random sample of 16 3-month-old baby girls was selected and their weights were recorded. a. What is the probability that the average weight of the 16 baby girls is more than 14 pounds? b. What is the probability that the average weight of the 16 baby girls is less than...
(please make answer clear) Big Babies: A public health organization reports that 19% of baby boys...
(please make answer clear) Big Babies: A public health organization reports that 19% of baby boys 6 - 8 months old in the United States weigh more than 20 pounds. A sample of 15 babies is studied. (a) What is the mean number who weigh more than 20 pounds in a sample of 15 babies aged 6 - 8 months? Round the answer to two decimal places. The mean number who weigh more than 20 pounds is __?? b) What...
The weights for newborn babies is approximately normally distributed with a mean of 6 pounds and...
The weights for newborn babies is approximately normally distributed with a mean of 6 pounds and a standard deviation of 1.7 pounds. Consider a group of 900 newborn babies: 1. How many would you expect to weigh between 5 and 9 pounds? 2. How many would you expect to weigh less than 8 pounds? 3. How many would you expect to weigh more than 7 pounds? 4. How many would you expect to weigh between 6 and 10 pounds?
Use the Empirical Rule to answer the questions below: The distribution of weights for newborn babies...
Use the Empirical Rule to answer the questions below: The distribution of weights for newborn babies is approximately normally distributed with a mean of 7.6 pounds and a standard deviation of 0.7 pounds. 1. What percent of newborn babies weigh more than 8.3 pounds?  % 2. The middle 95% of newborn babies weigh between and  pounds. 3. What percent of newborn babies weigh less than 6.2 pounds? % 4. Approximately 50% of newborn babies weigh more than  pounds. 5. What percent of newborn...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT