Given two independent random samples with the following results:nį = 8n2 = 12x1 = 98X2 = 121S1 = 11S2 = 33Use this data to find the 95 % confidence interval for the true difference between the population means. Assume that the population variances are not equal and thatthe two populations are normally distributed.Copy DataStep 2 of 3: Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places.

Answered: Image /qna-images/answer/4ce3c413-827f-4de7-969e-7dfa8d68d4ac.jpg

Answered: Given two independent random samples…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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If n=17, (x-bar)=48, and s=2, construct a confidence interval at a 80% confidence level. Assume the data came from a normally distributed population. Give your answers to one decimal place.
Determine the critical values for the confidence interval for the population variance from the given values. Round your answers to three decimal places. n=6n=6 and c=0.9c=0.9.
Given two independent random samples with the following results: ₁ = 16 n₁ = 8 ₁ = 98 ₁ = 70 s₁ = 15 5 = 19 Use this data to find the 90% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Step 3 of 3: Construct the 90% confidence interval. Round your answers to the nearest integer. Copy Data
Given two independent random samples with the following results: n₁ = 16 n₂ = 8 x₁ = 94 X2: $₁ = 16 = 124 $2 = 28 Use this data to find the 90% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Copy Data Step 2 of 3: Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places.
Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"
#3
The random sample of n=75�=75 yielded a sample mean of x¯=26�¯=26.Assume that we know the population standard deviation is σ=30�=30. Step 2 of 3 : Calculate a 95% confidence interval for the population mean. Round your answers to 2 decimals places.
The following table gives the average number of hours 5 junior high students were left unsupervised each day and their corresponding overall grade averages. Hours Unsupervised 2 2 4 6 6 Overall Grades 64 73 76 77 86 Show Transcribed Text Step 1 of 5: Calculate the sum of squared errors (SSE). Use the values = 62.2000 and b, 3.2500 for the calculations, Round your answer to three decimal places Table Copy Data Step 2 of 5: Calculate the estimated variance of errors. 2. Round your answer to three decimal places. Show Transcribed Text Step 3 of 5: Calculate the estimated variance of slope. s. Round your answer to three decimal places.
If n=22, (x-bar)=34, and s=17, construct a confidence interval at a 99% confidence level. Assume the data came from a normally distributed population. Give your answers to one decimal place.
Set up the null and alternate hypotheses to test whether the population mean is equal to 10 when you have a sample mean. H0: Ha:

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