Large samples of women and men are obtained, and the hemoglobin level is measured in each subject. Here is the 95% confidence interval for the difference between the two population means, where the measures from women correspond to population 1 and the measures from men correspond to population 2: -1.76 g/dL
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- A researcher would like to know how much physical endurance is affected by a common herbal supplement. The researcher measures endurance for a sample of n = 9 participants. Each is then given a 30-day supply of the herbs and, one month later, endurance is measured again. For this sample, endurance increased by an average of MD= 6 points with SSD = 216. a. make a point estimate of the mean difference in endurance after taking the herbs. b. make a 95% confidence interval estimate of the population mean difference.People with high blood pressure suffer from hypertension. Data on fasting blood sugar (milligrams/deciliter) and magnesium (milligrams/deciliter) in blood specimens collected from 60 patients diagnosed with hypertension were collected. The accompanying technology printout gives 90% confidence intervals for the mean fasting blood sugar (FBS) and mean magnesium level (MAG). Use this information to complete parts a through d below. Variable FBS MAG N 60 60 Mean 102.11 1.85238 StDev 38.91 0.05472 90% CI SE Mean 5.02 ( 93.72, 110.50 ) 0.00706 (1.84058, 1.86418) a. Locate and interpret the 90% confidence interval for mean fasting blood sugar on the printout. (Type integers or decimals. Do not round.) O A. The 90% confidence interval for mean fasting blood sugar indicates that 90% of all hypertensive patients will have a fasting blood sugar level between O B. The 90% confidence interval for mean fasting blood sugar indicates that 90% of hypertensive patients in the sample had a fasting blood…Here are the summary statistics for randomly selected weights of newborn girls: n =247, x= 32.2 hg, s= 6.8hg . Construct a confidence interval estimate of the mean. Use 90% confidence level. Are these results very different from the confidence interval 31.0 hg < u < 33.2 hg with only 18 sample values, x= 32.1 hg and s=. 2.7 hg ? What is the confidence interval for the population mean u ? _ hg < u< hg _ (round to one decimal places as needed ? Are the results between the two confidence intervals very different ? a. Yes, because the confidence interval limits are not similar. b. No. because the confidence interval limits are similarc. Yes, because one confidence interval does not contain the mean of the other confidence intervald.
- Use the given information to answer the following questions. independent samples of 6 measurements from each of 4 populations; MSE = 6.69 with 20 degrees of freedom, x, = 88.9 and x, = 83.5, 90% confidence Find a confidence interval estimate for u,. (Round your answers to three decimal places.) to Find a confidence interval estimate for u, - Hg. (Round your answers to three decimal places.) to You may need to use the appropriate appendix table or technology to answer this question. Need Help? Read ItHere are summary statistics for randomly selected weights of newborn girls:n=157, x=28.8 hg, s=7.2 hg. Construct a confidence interval estimate of the mean. Use a 99% confidence level. Are these results very different from the confidence interval 26.1 hgLet μ denote some population mean of interest and suppose a 95% confidence interval for μ is calculated to be (0.63, 0.73) and a 99% confidence interval for μ is calculated to be (0.61,0.75). Also, suppose that we want to test H0: μ = 0.77 vs. Ha: μ ≠ 0.77 What can you say about the corresponding p-value? Choose from following letters. a. The corresponding p-value will be smaller than 0.05 but larger than 0.01. b. The corresponding p-value will be larger than 0.05. c. the corresponding p-value will be smaller than 0.01. d. I can’t say anything about the corresponding p-value until I run the testHere are summary statistics for randomly selected weights of newborn girls: n=157, x=29.4 hg, s=6.7 Construct a confidence interval estimate of the mean. Use a 95% confidence level. Are these results very different from the confidence interval 28.8 hg<μ<31.0 hg with only 20 sample values, x=29.9 hg, and s=2.4 hg? What is the confidence interval for the population mean μ? nothing hg<μ<nothing hg (Round to one decimal place as needed.)A researcher would like to know how much physical endurance is affected by a common herbal supplement. The researcher measures endurance for a sample of n = 9 participants. Each is then given a 30-day supply of the herbs and, one month later, endurance is measured again. For this sample, endurance increased by an average of MD= 6 points with SSD = 216. a. make a point estimate of the mean difference in endurance after taking the herbs. b. make a 95% confidence interval estimate of the population mean difference.Here are summary statistics for randomly selected weights of newborn girls: n=218, x=32.8hg,s=6.2hg. Construct a confidence interval estimate of the mean. Use a 90% confidence level. Are these results very different from the confidence interval 32.0hg <μ<33.4 hg with only 20 sample values, x=32.7hg, and s=1.8hg? What is the confidence interval for the population mean μ?_____hg <μ<___hg Are the results between the two confidence intervals very different?Here are summary statistics for randomly selected weights of newborn girls: n=217, x=31.7hg, s=6.5hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval 29.6hg<μ<32.6hg with only 17 sample values, x=31.1hg, and s=2.4hg? What is the confidence interval for the population mean μ? hg < μ < hg (Round to one decimal place as needed.)Here are summary statistics for randomly selected weights of newborn girls: n = 171, x = 29.8 hg, s = 6.8 hg. Construct a confidence interval estimate of the mean. Use a 95% confidence level. Are these results very different from the confidence interval 28.0 hgThese are the numbers I am working with: Sample mean= 78 Population mean= 75 Standard deviation:=10 Significance level: .05 Critical value: Z score > 1.96 Z score= 1.34 How do I figure the confidence limits for the 95% confidence interval. 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