Question

the mean weight for 6 year old american boys is about 50 with a standard deviation...

the mean weight for 6 year old american boys is about 50 with a standard deviation of 8 pounds. for 13 year old boys mean is about 95 pounds with a standard deviation of 15 pounds. assume the weights are distributed nornally for thjs problem. what is the probability that two random 6 year old boys will together weigh more than a random thirteen year ild boy?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Assume that the population mean weight for ten year old boys is μ = 88 pounds...
Assume that the population mean weight for ten year old boys is μ = 88 pounds with population standard deviation σ = 2.2 pounds. Also assume that the data is normally distributed. What proportion of ten year old boys weigh more than 91 pounds?
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
According to the children's growth chart the heights of two-year-old boys are normally distributed with a...
According to the children's growth chart the heights of two-year-old boys are normally distributed with a mean of 32.3 inches and a standard deviation of 1.4 inches. If a two-year-old boy is selected at random, what is the probability that he will be more than 34.2 inches tall?
The mean height of a sample of 15-year-old boys is 175 centimeters, with a standard deviation...
The mean height of a sample of 15-year-old boys is 175 centimeters, with a standard deviation of 10. For a sample of 15-year-old girls, the mean is 165 centimeters with a standard deviation of 8. If 8 boys and 8 girls were sampled, the standard deviation of the difference is ___. (Round your answer to the nearest hundredth.)
5. Horses in a stable have a mean weight of 950 pounds with a standard deviation...
5. Horses in a stable have a mean weight of 950 pounds with a standard deviation of 77 pounds. Weights of horses follow the normal distribution. One horse is selected at random. a) What is the probability that the horse weighs less than 900 pounds? b) What is the probability that the horse weigh more than 1,100 pounds? c) What is the probability that the horse weighs between 900 and 1,100 pounds? d) What weight is the 90th percentile? (Round...
In a certain​ country, the mean birth weight for boys is 3.28kg, with a standard deviation...
In a certain​ country, the mean birth weight for boys is 3.28kg, with a standard deviation of 0.57kg. Assuming that the distribution of birth weight is approximately​ normal, complete parts a through e below. a. A baby is considered of low birth weight if it weighs less than 2.5 kg. What proportion of baby boys in this country are born with low birth​ weight? The proportion of baby boys that are born with a low birth weight is ? b....
A sample of 249 one-year-old baby boys in the United States had a mean weight of...
A sample of 249 one-year-old baby boys in the United States had a mean weight of 24.2 pounds. Assume the population standard deviation is 4.7 pounds. What is the upper bound of the 90% confidence interval for the mean lifetime of the components?
6. A pediatrician claims that the standard deviation of the heights of 2-year-old boys is less...
6. A pediatrician claims that the standard deviation of the heights of 2-year-old boys is less than 1.43 inches. A random sample of 11 2-year-old boys revealed that their standard deviation is 1.42 inches. Test the pediatrician’s claim at the 1% level of significance.
a sample of 279 one year old baby boys in the US had a mean weight...
a sample of 279 one year old baby boys in the US had a mean weight of 25.9 pounds. assume the population standard deviation is 5.9 pounds. what is the upper bound of the 90% confidence interval for the mean lifetime of the components. round your answer to two decimal places
In a certain​ country, the mean birth weight for boys 3.23 ​kg, with a standard deviation...
In a certain​ country, the mean birth weight for boys 3.23 ​kg, with a standard deviation of 0.58 kg. Assuming that the distribution of birth weight is approximately​ normal, complete parts a through e below.a. A baby is considered of low birth weight if it weighs less than 2.5 kg. a. What proportion of baby boys in this country are born with low birth​ weight? b. What is the​ z-score for a baby boy that weighs 1.5 kg​ (defined as...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT