Question

The 95% confidence interval for all the mean weight of infants born to mothers who smoke...

  1. The 95% confidence interval for all the mean weight of infants born to mothers who smoke is µ = 5.40 to 6.80 pounds. The mean weight for a random sample of 25 newborns in this region is 7.2 pounds with a standard deviation (s) of 0.85 pounds.
    1. Is the birth weight of the infants in this sample significantly different from that of the general population at α=0.05? (10 points) Explain your response (4 pts).

Please show work . Thank you .

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
The mean birth weight of male babies born to 121 mothers taking a vitamin supplement is...
The mean birth weight of male babies born to 121 mothers taking a vitamin supplement is 3.633.63 kilograms with a standard deviation of 0.630.63 kilogram. Use a 0.05 significance level to test the claim that the mean birth weight of all babies born to mothers taking the vitamin supplement is equal to 3.39​ kilograms, which is the mean for the population of all male babies. State the null and alternative hypotheses. Find the z-score and the P value and make...
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. If α = 0.05, what is the critical t-value? Multiple Choice −2.365 ±1.96 ±2.365 ±2.447
The mean birth weight of infants in the United States is μ = 3315 grams. Let...
The mean birth weight of infants in the United States is μ = 3315 grams. Let X be the birth weight (in grams) of a randomly selected infant in Jerusalem. Assume that the distribution of X is N(μ, σ2), where μ and σ2 are unknown. 25 new-born infants randomly selected in Jerusalem yielded a sample mean of 3515 grams and a standard deviation of s = 500 grams. Use the data to test the null hypothesis H0: μ = 3315...
4. The mean weight of newborn infants at a community hospital is 6.6 pounds A sample...
4. The mean weight of newborn infants at a community hospital 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. Do they really weigh only 6.6 pounds? I thought they would weigh more. A. State the hypotheses b. Find the calculated value of the test statistic c. State critical value at α = .05 d. State conclusion
13. The value used for the mean weight of elevator passengers by the state Division of...
13. The value used for the mean weight of elevator passengers by the state Division of Labor is 190 pounds. The Division wishes to investigate whether this value needs to be changed (upward or downward). A sample of 27 individuals in buildings having an elevator yielded sample mean 196 pounds and sample standard deviation 35 pounds. Assume the population is normally distributed. (a) State the null and alternative hypotheses for the test. 13A. [2 points] Construct the rejection region for...
Q: A 95% confidence interval for the mean is (102, 106). If we test Ho: ?...
Q: A 95% confidence interval for the mean is (102, 106). If we test Ho: ? = 100 vs. H1: ? ? 100, the p-value will be: (A) larger than 0.05 (B) smaller than 0.05 (C) larger than 0.01 (D) smaller than 0.01 Q: Suppose you want to conduct a t-test using ? = 0.05. You take a random sample of size 30 and obtain the sample mean and sample standard deviation. As a result, you fail to reject the...
BIOS 376 Homework 7 1. A professor claims that the mean IQ for college students is...
BIOS 376 Homework 7 1. A professor claims that the mean IQ for college students is 92. He collects a random sample of 85 college students to test this claim and the mean IQ from the sample is 84. (a) What are the null and alternative hypotheses to test the initial claim? (1 pt) (b) Using R, compute the test statistic. Assume the population standard deviation of IQ scores for college students is 17.6 points. (1 pt) (c) Using R,...
Do all the following problems. I. Choose the best answer for each multiple choice. Please use...
Do all the following problems. I. Choose the best answer for each multiple choice. Please use CAPITAL letters to indicate your answer and write neatly. (30 points) 1. ____ 4.____ 7. ____ 10.____ 13. ____ 2. ____ 5.____ 8. ____ 11.____ 14. ____ 3. ____ 6.____ 9. ____ 12.____ 15. ____ Whenever the population standard deviation is unknown and the population has a normal or near-normal distribution, which distribution is used in developing an interval estimation? A. standard distribution B....
1. A city official claims that the proportion of all commuters who are in favor of...
1. A city official claims that the proportion of all commuters who are in favor of an expanded public transportation system is 50%. A newspaper conducts a survey to determine whether this proportion is different from 50%. Out of 225 randomly chosen commuters, the survey finds that 90 of them reply yes when asked if they support an expanded public transportation system. Test the official’s claim at α = 0.05. 2. A survey of 225 randomly chosen commuters are asked...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT