1: Two random samples taken from two normal populations yielded the following information:Sample sizen1 = 9n2 = 31Sample variances} = 45s = 30Sample1%3Di.Find the test statistic FFind the degrees of freedom dfl and df2.Perform the test the hypotheses Ho: of = ož vs. H1: o} # ož at the 5% level ofsignificance.ii.iii.

i. The test statistic is, F=s12s22=4530=1.50 Thus, the test statistic is 1.50. ii. The degrees of…

1: Two random samples taken from two normal populations yielded the following information: Sample size nz = 9 Sample variance sỉ = 45 s = 30 Sample 1 n2 = 31 i. Find the test statistic F ii. Find the degrees of freedom dfl and df2. Perform the test the hypotheses Ho: o} = ož vs. H1: o? # ož at the 5% level of significance. iii. %3D

1: Two random samples taken from two normal populations yielded the following information: Sample size nz = 9 Sample variance sỉ = 45 s = 30 Sample 1 n2 = 31 i. Find the test statistic F ii. Find the degrees of freedom dfl and df2. Perform the test the hypotheses Ho: o} = ož vs. H1: o? # ož at the 5% level of significance. iii. %3D

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Given below are the analysis of variance results from a Minitab display. Assume that you want to use a 0.05 significance level in testing the null hypothesis that the different samples come from populations with the same mean. What can you conclude about the equality of the population means? Source DF s MS F Factor 3 30 10.00 1.6 0.264 Error 50 6.25 Total 11 80 O A. Reject the null hypothesis since the p-value is greater than the significance level. O B. Reject the null hypothesis since the p-value is less than the significance level. OC. Fail to reject the null hypothesis since the p-value is greater than the significance level. O D. Fail to reject the null hypothesis since the p-value is less than the significance level.
Using the image attached please assist by:1. Using R-Studio code, carry out relevant tests to determine if the assumptions of normality and homogeneity of variance were violated. Discuss the findings and quote relevant statistics in your response and provide the necessary hypotheses. fyi: there is no need to present the associated output tables, the code used only would suffice. Just show workings that I may follow closley.
b. A study conducted to compare the breakdown voltage in two insulating liquids, yields the voltage (kV) readings below, 62 58 Liquid 1 Liquid 2 53 47 56 55 50 59 56 60 59 46 44 47 51 53 i) Calculate the sample mean and sample variance of both liquids i.e. F1, I2, s,² and s,?. ii) Construct a 90% confidence interval for the difference in the mean breakdown voltage of both liquids. iii) Test at the 10% level of significance whether the mean breakdown voltage of liquid 1 exceeds that of liquid 2. Use the critical value approach.
sion Making home > 5.2: Hypothesis test for a population mean ISION TON Uhe 7-test?Y Ho lypothesis test for a population mean. 9 Jump to level 1 A factory that manufactures bolts is performing a quality control experiment. Each object should have a length of no more than 20 centimeters. The factory believes that the length of the bolts exceeds this value and measures the length of 59 bolts. The sample mean]bolt length was 20.05 centimeters. The population standard deviation is known to be o = 0.16 centimeters. What is the test statistic z? Ex: 1.23= What is the p-value? Ex. 0.123 Does sufficient evidence exist that the length of bolts is actually greater than Select the mean value at a significance level of a = 0.05?! Check Next MESA 81101 2 hp
You may need to use the appropriate technology to answer this question A sample of nie days over the past six months showed that a dentist treated the following numbers of patients at his dental clinic: 21, 24, 19, 18, 15, 21, 23, 18, and 26. If the number of patients sen per day is normally distributed, would an analysis of these sample data reject the hypothesis that the variance in the number of patients se per day is equal to 10? Use a 0.10 level of significance State the null and alternative hypotheses 0²10 Ha² 10 0²10 <10 0-10 H₂² 10 0²10 H 103 010 H30 Find the value of the test statistic (Hind your answer to three decimal places) Find the value (snd your awer to four decimal places) produ b State your cohesion Reject We can conclude that the variance in the munber of patients seen per ilay is not equal to 10. De not reject H W cen conclude that the variance in the number of pats seen per day of equal to 10 Od ni reject. We capot conclude that the vartance in the number of…
2
2. Three (3) treatments were compared using a completely randomized design. The data are shown below. Do the data provide sufficient evidence to indicate a difference in location for at least two of the population distributions? Use Non- Parametric test alpha =.05 level of significance. 1 26 29 23 24 28 26 2 22 31 34 28 29 32 30 33 3 25 24 27 22 24 20
QUESTION 4 We want to test whether males are taller than females. Heights of males and females are collected and the excel outputs are given below. Assume height is normally distributed for males and females with unequal variances. t-Test: Two-Sample Assuming Equal Variances t-Test: Two-Sample Assuming Unequal Variances Male Female Male Female Mean Variance Observations 170.86 169,1333 11.2249 15.93636 Mean 170.86 169.1333 Variance Observations Hypothesized Mean Difference 50 45 11.2249 15.93636 Pooled Variance 13.45398 50 45 Hypothesized Mean Difference df 93 86 t Stat 2.290934 t Stat 2.269888 P(T<=t) one-tail t Critical one-tail P(T<=t) one-tail. t Critical one-tail 0.012857 1.662765 0.012113 1.661404 P(T<=t) two-tail t Critical two-tail 0.025715 P(T<=t) two-tail t Critical two-tail 0.024226 1.985802 1.987934 You are given two excel outputs. Select the appropriate output to answer questions. Write down the p-value for this test given in the table (give you answer to 4 decimal…
Eemaining Time: 1 hour. 37 minutes, 54 seconds. Question Completion Status: QUESTION 10 A normally distributed random variable X with variance o = 400 and P(X> 130) = 0.6554. Then the mean of X is O 122 O 138 O 120 O 290 QUESTION 11 For the given data in stem-and- leaf display form, find the inter-quartile range. 3.2 | 4579 3.3 | 02558 3.4 | 45789 3.5 | 11678 3.6 | 0268 O 2.5 O 0.28 O 0.31
50
Which is not one of the major assumptions typically associated with parametric tests of significance? A. Random Selection B. Homogeneity of Variance C. Absence of restricted ranges
At a .01 significance level with a sample size of 10, find the critical value for the correlation coefficient C.V. = ± (include 3 decimals)