ZuoTi.Pro
Question

1. The CD4 T cell counts (x10 /I) at baseline for a sample of 13 patients follows. 230 205 313 207 227 245 173 58 103 181 105 301 169 a) (10 pts) Draw a boxplot of the data and comment on the skewness of the distribution. b) (5 pts) Determine a point estimate for the population mean CD4 T cell count. c) (10 pts) Determine a 90% confidence interval for the population mean CD4 T cell count (assume the counts are normally distributed). d) (20 pts) Suppose researchers believe the average CD4 T cell count in the population is 210 (x106 / 1) . Based on the confidence interval from part (c), at a 10% significance level, do the sample data support this belief? Perform an appropriate hypothesis test.

Help please :)

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

50 100 150 200250300x=c (230,205, 313,207,227,245,173, 58,103,181,105,301, 169) 3 > x [1 230 205 313 207 227 245 173 58 103 181 105 301 l169 > ##ATE IAor plat shows data atf popualon man χ 186 . 6423 sid dis s 86.7202 Sample sizn 13 shaws data 143.615 V 133-6154 1-7823

0 0
Add a comment
Know the answer?
Add Answer to:
Help please :) 1. The CD4 T cell counts (x10 /I) at baseline for a sample...
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

  • Please show step by step work, thanks! 1. The CD4 T cell counts (x106/I) at baseline...

    Please show step by step work, thanks! 1. The CD4 T cell counts (x106/I) at baseline for a sample of 13 patients follows. 230 205 313 207 227 245 173 58 103 181 105 301 169 a) b)Determine a point estimate for the population mean CD4 T cell count. c) (assume the counts are normally distributed). d) (x 106 /1) . Based on the confidence interval from part (c), at a l0% significance level, do the sample data support this...

  • Please Help with BOTH 1) 2) An article reported that for a sample of 56 kitchens...

    Please Help with BOTH 1) 2) An article reported that for a sample of 56 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 163.36. (a) Calculate and interpret a 95% (two-sided) confidence interval for true average CO2 level in the population of all homes from which the sample was selected. (Round your answers to two decimal places.) ppm Interpret the resulting interval. We are...

  • Download the hypothesis testing dataset from the class website. 1. This is case 1, in which...

    Download the hypothesis testing dataset from the class website. 1. This is case 1, in which the value of population standard deviation is assumed to be known. a. Compute the standard deviation of the textbook price and assume this to be the population standard deviation. Type this value in E5. b. Pick a random sample of size 15. c. Compute the mean of your random sample in E4 using the AVERAGE function. d. Calculate the standard error in cell E9...

  • 1. What sample size is needed to estimate the mean white blood cell count (in cells...

    1. What sample size is needed to estimate the mean white blood cell count (in cells per (1 poin microliter) for the population of adults in the United States? Assume that you want 99% confidence that the sample mean is within 0.2 of population mean. The population standard deviation is 2.5. O 601 1036 O 1037 O 33 2. The sample space of a population being researched contains 58 values and a mean of 318.6. (point The population has a...

  • urgent one hours plz help quick t-distribution PARAMETER equal to n-1, where n the the sample...

    urgent one hours plz help quick t-distribution PARAMETER equal to n-1, where n the the sample size used to estimate the sample mean and standard deviation. 123456789101112131415 Gives the number of STANDARD DEVIATIONS a value is from the mean. 123456789101112131415 Standard deviation of a sample statistic. 123456789101112131415 Using data to determine properties of population parameters. 123456789101112131415 A NORMAL distribution with mean 0 and standard deviation 1. 123456789101112131415 Gives the NORMALITY of sample means for large sample. 123456789101112131415 A known percentage...

  • i would use a t distribution because its a sample and its normally distrubted, im not...

    i would use a t distribution because its a sample and its normally distrubted, im not sure if thats correct 9. (0 points) Assume that all cell phone prices are normally distributed. In a random sample of 20 cell phones, you find that the mean price was $500 with a standard deviation of $180. If you would like to construct a 95%-confidence interval to estimate the population mean, what distribution would you use to find the margin of error? Explain...

  • answer all questions and ill leave a like :) part 1 a) find the sample mean...

    answer all questions and ill leave a like :) part 1 a) find the sample mean b) find the sample standard deviation c) construct a 99% confidence interval for the population mean u part 2 just answer the second part part 3 just answer the second part part 4 part 5 part 6 find answers a-c 8 of 10 (0 complete) HW Score: 0%, 0 of 10 pts Score: 0 of 1 pt 6.2.26-T Question Help The grade point averages...

  • i need help with #13 please explain in detail 11. State the interval. The interval is...

    i need help with #13 please explain in detail 11. State the interval. The interval is (0.506041,0.852655) 12. Interpret the interval. We are 95% confident that the population mean of the females that exercise regularly are between 0.506041 and 0.852655. Descriptive Statistics N Event Sample p95% CI for p 30 21 0.700000 (0.506041, 0.852655) 13. Suppose that you are a journalist that has been asked to summarize the results of this study. Give a brief summary of the results so...

  • I need help with #4, plz 3. A simple random sample of size n is drawn...

    I need help with #4, plz 3. A simple random sample of size n is drawn from a population that is normally distributed. The sample mean is found to be 108 and the sample standard deviation, s, is found to be 10. a) Construct a 96% confidence interval u if the sample size, n, is 25. 4. A random sample of 1005 adult Americans was asked "How would you prefer to pay for new road construction?" Results of the survey...

  • Complete a-d 9.2.17 O of 1 Point Question Help A simple random sample of size n...

    Complete a-d 9.2.17 O of 1 Point Question Help A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 106. and the sample standard deviation, s, is found to be 10. (a) Construct a 96% confidence interval about if the sample size, n, is 24. (b) Construct a 96% confidence interval about u if the sample size, n, is 28. (c) Construct a 98% confidence interval...

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