ZuoTi.Pro
Question

The average weight at birth of babies is µ = 7.7 lbs. with a standard deviation...

The average weight at birth of babies is µ = 7.7 lbs. with a standard deviation of σ = 1.1 lbs. A mother, interested to see whether the babies born in Santa Cruz in September were heavier or lighter than the national average, gathered data from n = 36 babies and found a mean weight of M = 8.9 lbs.

a) Calculate the Z-test value.

b) What are the z-critical values if we want to use an .01 alpha level?

c) What decision regarding the null hypothesis?

d) Calculate a 80% confidence interval for the weight of Santa Cruz babies born in September. Make sure to use the standard error you calculated in the previous question.

e) Calculate the standard error.

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
The average weight at birth of babies is µ = 7.7 lbs. with a standard deviation...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 1. Suppose we know that the birth weight of babies is normally and standard deviation 500g. (1) W...

    1. Suppose we know that the birth weight of babies is normally and standard deviation 500g. (1) What is the probability that a baby is born that wei than 3100g? I t What are the parameters? a. b. Construct the normal distribution density curve. then shade your seeking area. ind the z-score, and then shade your seeking area. construct the standard normal distribution density curve, d. Find the probability. 1. Suppose we know that the birth weight of babies is...

  • The table below shows the birth weight in grams of 12 babies born at 40 weeks...

    The table below shows the birth weight in grams of 12 babies born at 40 weeks to mothers with type I diabetes. 4165 2894 4106 3591 2867 3528 3215 3026 4300 4174 4032 3771 a) Calculate the sample mean and variance for the birth weight in this sample. 
 b) Estimate the population mean and variance and compare with the known values μ0=3525 grams and σ0=450 grams (the data were actually generated using a normal distribution with these parameter values). Why...

  • Match the following words to their correct definitions. Write the correct letter in the space next...

    Match the following words to their correct definitions. Write the correct letter in the space next to the definition. (1 point each). Note: You will not use all the words. ______a subset of the population we are interested in studying ______The difference between the sample measure and the corresponding population measure. ______the total set of subjects that are being studied ______The number of standard deviations away from the mean a particular data point is _____ ______A normal distribution with a...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT