Question

1. A researcher claims that the mean age of women in California at the time of...

1. A researcher claims that the mean age of women in California at the time of a first marriage is higher than 26.5 years. Surveying a simple random sample of 210 newlywed women in California, the researcher found a mean age of 27.0 years. Assuming that the population standard deviation is 2.3 years and using a 95% level of confidence, determine if there is sufficient evidence to support the researcher’s claim.

2. Nurses in a large teaching hospital have complained for many years that they are overworked and understaffed. The consensus among the nursing staff is that the mean number of patients per nurse each shift is at least 8.0. The hospital administrators claim that the mean is lower than 8.0. In order to prove their point to the nursing staff, the administrators gather information from a simple random sample of 18 nurses’ shifts. The sample mean is 7.5 patients per nurse with a standard deviation of 1.1 patients per nurse.

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
13. A researcher claims that the average age of a woman when she has her first...
13. A researcher claims that the average age of a woman when she has her first child is still equal to the 1993 mean of 27.1 years. She obtains a random sample of 30 women who had their first child this year and finds the sample mean age to be 28.2 years. Suppose the population standard deviation is 6.4 years. Test the researcher’s claim using α = 0.10. State the critical value(s) for this test and draw a picture of...
A researcher wishes to test the hypothesis that the mean age at first marriage for women...
A researcher wishes to test the hypothesis that the mean age at first marriage for women in Texas is less than 23.2. In a sample of 69 Texas women, he finds that the average age is 23.5 with a standard deviation of 4.2. Calculate the test statistic to two decimal places. I must be using wrong formula FOR these types of problems, please show step by step, Thanks Business Analysis3363 homework
A researcher was interested in comparing the amount of time spent watching television by women and...
A researcher was interested in comparing the amount of time spent watching television by women and by men. Independent simple random samples of 14 women and 17 men were selected, and each person was asked how many hours he or she had watched television during the previous week. The summary statistics are as follows: Women        Men   _ Sample mean      11.9 hrs      16.9 hrs Sample SD         4.1 hrs        4.8 hrs Sample size            14                17 Use this data and a 0.05 significance...
A researcher was interested in comparing the amount of time spent watching television by women and...
A researcher was interested in comparing the amount of time spent watching television by women and by men. Independent simple random samples of 14 women and 17 men were selected, and each person was asked how many hours he or she had watched television during the previous week. The summary statistics are as follows:                                     Women          Men   .         Sample Mean         12.9             16.4         Sample SD             4.0                4.2         Sample Size            14                 17 This sample data is then used to test the claim that the mean time spent watching television by women...
7. (2 pts) A national business magazine reports that the mean age of retirement for women...
7. (2 pts) A national business magazine reports that the mean age of retirement for women executives is 61.0. A women's rights organization believes that this value does not currently depict the current trend in retirement. To test this the group polled a simple random sample of 95recently retired women executives and found that they had a mean age of retirement of 61.5.Assuming the population standard deviation is 2.5 years, is there sufficient evidence to support the organization’s belief at...
A researcher claims that the mean annual production of cotton is 3.5 million bales per country....
A researcher claims that the mean annual production of cotton is 3.5 million bales per country. A random sample of 44 countries has a mean of annual production of 2.1 million bales and a standard deviation of 4.5 million bales. Use a 0.05 significance level to test the researcher’s claim. a. Hypothesis (steps 1-3): b. Value of Test Statistic (steps 5-6): c. P-value (step 6): d. Decision (steps 4 and 7): e. Conclusion (step 8):
A researcher claims that the mean annual production of cotton is 3.5 million bales per country....
A researcher claims that the mean annual production of cotton is 3.5 million bales per country. A random sample of 44 countries has a mean of annual production of 2.1 million bales and a standard deviation of 4.5 million bales. Use a 0.05 significance level to test the researcher’s claim. a. Hypothesis (steps 1-3): b. Value of Test Statistic (steps 5-6): c. P-value (step 6): d. Decision (steps 4 and 7): e. Conclusion (step 8):
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,...
1. According to a recent report, 38% of adults wait until they are 30 years of...
1. According to a recent report, 38% of adults wait until they are 30 years of age or older to get married for the first time. A researcher believes this claimed value is too low. He gathers data in order to test the hypotheses Ho: p = 0.38 vs. Ha: p > 0.38. In these hypotheses, what does p represent? A. The sample proportion B. The population proportion C. The p-value D. The sample mean E. The population mean 2....
Question 15 (1 point) A USA Today article claims that the proportion of people who believe...
Question 15 (1 point) A USA Today article claims that the proportion of people who believe global warming is a serious issue is 0.63, but given the number of people you've talked to about this same issue, you believe it is less than 0.63. The hypotheses for this test are Null Hypothesis: p ≥ 0.63, Alternative Hypothesis: p < 0.63. You take a random sample and perform a hypothesis test, getting a p-value of 0.5939. What is the appropriate conclusion?...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT