Consider the following results for two independent random samples taken from two populations.Sample 1 Sample 2n 1402 30x1 13.5 X2 11.101-2.3a. What is the point estimate of the difference between the two population means? (to 1 decimal)σ 2-3.52.4b. Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). Use z-table.C. Provide a 95% confidence interval for the difference between the two population means (to 2 decimals). Use z-table. If your answer is negative, enter mi

a.The point estimate of the difference between the two population means is given below,

Answered: Consider the following results for two…

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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Given two dependent random samples with the following results: 44 21 39 33 17 31 24 Population 1 Population 2 31 19 36 41 31 21 29 Use this data to find the 80 % confidence interval for the true difference between the population means. Let d = (Population 1 entry)-(Population 2 entry). Assume that both populations are normally distributed. Step 1 of 4: Find the mean of the paired differences, d. Round your answer to one decimal place. Answor
For a population dataset with variance o2=24.60- How large a sample should be for a margin of error for a 95% confidence interval of u to 3.20? O A. 160 O B. 7 C. 227 D. 10
5.1 & 6.2 Question 13, 6.1.34 Part 1 of 2 Use the confidence interval to find the estimated margin of error. Then find the sample mean. HW Score: 44.29%, 15.5 of 35 O Points: 0 of 1 A store manager reports a confidence interval of (44.8,83.8) when estimating the mean price (in dollars) for the population of textbooks. The estimated margin of error is (Type an integer or a decimal.) Clear all his View an example Get more help - Q Search
Consider the following results for independent samples taken from two populations; Sample 1 N 400 X 0.48 Sample 2 N300 X 0.36 A. What is the 90% confidence interval for the difference between the two population proportions? Round your answers to four decimal places B. What is the 95% confidence interval for the difference interval between the two population proportions? Round you answer 2 decimal places and use a 0 in front of the decimal places.
Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
9. A random sample of 25 statistics examinations was taken. The average score in the sample was 76 with a variance of 144. Assuming the scores are normally distributed, the 99% confidence interval for the population average examination score is a. 70.02 to 81.98 b. 69.82 to 82.18 C. 70.06 to 81.94 d. 69.48 to 82.52
The following statistics are computed by sampling from three normal populations whose variances are equal: (You may find it useful to reference the table and the g table.) = 30.1, n₁ = 7; 2 = 35.5, n2 = 9; 3 = 40.9, n3 = 4; MSE = 25.0 a. Calculate 95% confidence intervals for H1 H2, H1 - Hз, and μ2 - μз to test for mean differences with Fisher's LSD approach. (Negative values should be indicated by a minus sign. Round final answers to 2 decimal points.) Population Mean Differences H1-H2 H1 H3 H2 H3 Confidence Interval Can we conclude that the population means differ?
Given two independent random samples with the following results: n₂ = 8 x₂ = 124 $2 = 28 = 16 n₁ x₁ = 94 $1 = 16 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 1 of 3: Find the point estimate that should be used in constructing the confidence interval.
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"
Given two dependent random samples with the following results: Population 1 48 29 32 29 38 31 28 Population 2 45 38 41 16 40 28 38 Use this data to find the 95% confidence interval for the true difference between the population means. Assume that both populations are normally distributed. Copy Data Step 2 of 4 : Calculate the sample standard deviation of the paired differences. Round your answer to six decimal places.

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