Use the given statistics to complete parts (a) and (b). Assume that the populations are normally distributed.(a) Test whether Hy > H2 at the a = 0.01 level of significance for the given sample data.(b) Construct a 90% confidence interval about u -H2Population 1Population 2201950.745.54.712.9(a) Identify the null and alternative hypotheses for this test.OC. Ho: H1 # 2H: H1 = H2O B. Ho: H1>2O A. Ho: H1 H2H: H 42Find the test statistic for this hypothesis test.(Round to two decimal places as needed.)

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Answered: Use the given statistics to complete…

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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Two groups were selected for an experiment. The sample data is reported: Group A Group B Sample Mean Spending/day ($) 170 150 Sample Standard deviation ($) 10 5 # of Females 9 7 Sample Size 36 42 a. Set up a 99% confidence interval for the mean difference in spending between the two groups. b. At the 10% level test the alternate hypothesis that group B has lower spending level than Group A.
Assume that both populations are normally distributed. a) Test whether . Population 1 Population 2 10 11.1 Pt2 at the a= 0.05 level of significance for the given sample data 10 9.8 2.3 (b) Construct a 95% confidence interval about u, - H3. 2.7 H1 H1 > H2 O C. Ho H1-H2 H1 H1> H2 D. Ho H1=H2 %3D Detemine the P-value for this hypothesis test. P = (Round to three decimal places as needed.) %24
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 data below are yields for two different types of corn seed that were used on adjacent plots of land. Assume that the data are simple random samples and that the differences have a distribution that is approximately normal. Construct a 95% confidence interval estimate of the difference between type 1 and type 2 yields. What does the confidence interval suggest about farmer Joe's claim that type 1 seed is better than type 2 seed?Type 1 2143 2024 2142 2433 2142 2034 2211 1484 Type 2 2089 1924 2078 2467 2132 1949 2197 1482
Find the 98% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.) Sample Number Mean Std. Dev. 1 16 38 29 2 29 28 29 Lower Limit Upper Limit
(e) The means of all three data sets are to be compared by ANOVA. State the null hypothesis. Determine whether the means differ at the 95% confidence level.
The following data represents the number of insects counted in two different locations (A and B). Construct a 80% confidence interval for o²/02B. (round to the nearest tenth): DATA: Observation 1 2 3 4 5 6 7 8 9 LOCATION A 45 45 32 46 45 44 43 49 48 LOCATION B 49 41 49 42 48 42 49 47 1. In the answer box enter the upper confidence interval. 2. Evaluate the confidence interval and indicate if the variances are (yes) or are not (no) homogeneous (yes/no; place your answer right beside the upper confidence interval. Do not leave a space between the two answers).
Provide an appropriate response. Construct a 95% confidence interval for u1 -µ2. Two samples are randomly selected from normal populations. The sample statistics are given below. n1 = 8 x1= 4.1 n2 = 7 %3D x2 = 5.5 S2 = 2.51 $1 = 0.76 (-1.679, 1.987) (-3.813, 1.013) (-1,132, 1.543) (2.112, 2.113)
Use the given statistics to complete parts (a) and (b). Assume that the populations are normally distributed. (a) Test whether u, >uz at the a = 0.05 level of significance for the given sample data. (b) Construct a 99% confidence interval about u1 -P2. Population 2 23 Population 1 22 46.4 41.8 4.3 13.1 (a) Identify the null and alternative hypotheses for this test. O A. Ho: H1 = H2 H1: H1 # H2 O B. Ho: H1 =H2 H1: H1 H2 OF. Ho: H1 > H2 H1: H1 = H2 Find the test statistic for this hypothesis test. (Round to two decimal places as needed.)
Given two independent random samples with the following results: n₂ = 8 x₂ = 175 $2 = 11 n₁ = 12 x₁ = = 157 $₁ = 32 Use 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 that the two populations are normally distributed. Copy Data Step 1 of 3: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

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