Affected?/Type Pine Fir Cedar Total Yes 59 33 53 145 No 180 129 125 434 Total 239 162 178 579 The table shows a recent random sample of different tree species and whether or not they have been affected by a drought. At a 10% Level of Significance, test to see if whether a tree is affected by the drought is dependent on species. 1. The hypotheses are : O Ho:Trees species and drought effect are dependent Ha:Trees species and drought effect are independent O Ho:Trees species and drought effect are independent Ha:Trees species and drought effect are dependent 2. This is a O twoO rightO left tailed test; d.f. = 3a. The STS (to 2 decimals) is x = 3b. The P-value (to 3 decimals) = 4a. The decision at a = 10% is ODo not reject Ho

Affected?/Type Pine Fir Cedar Total Yes 59 33 53 145 No 180 129 125 434 Total 239 162 178 579 The table shows a recent random sample of different tree species and whether or not they have been affected by a drought. At a 10% Level of Significance, test to see if whether a tree is affected by the drought is dependent on species. 1. The hypotheses are : O Ho:Trees species and drought effect are dependent Ha:Trees species and drought effect are independent O Ho:Trees species and drought effect are independent Ha:Trees species and drought effect are dependent 2. This is a O twoO rightO left tailed test; d.f. = 3a. The STS (to 2 decimals) is x = 3b. The P-value (to 3 decimals) = 4a. The decision at a = 10% is ODo not reject Ho

Name: Affected?/TypePineFirCedarTotalYes593353145No180129125434Total2391621
Uploaded: 2024-03-20T07:07:00.000Z
Channel: Bartleby
Description: Affected?/TypePineFirCedarTotalYes593353145No180129125434Total239162178579The table shows a recent random sample of different tree species and whether or not they have beenaffected by a drought. At a 10% Level of Significance, test to see if whether

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

A comparison between species: Biologists wish to compare the prevalence of a genetic mutation across two species of Neema Toads. In a sample of 6 Neema Toads of Species I, 0.8% had the mutation while in a sample of 14 Neema Toads of Species II, 0.7% showed the mutation. Is there significant evidence to suggest a difference in the prevalence of the mutation across the two species? Conduct a hypothesis test at a significance level of α=0.01α=0.01.a) The hypotheses for this test are: H0: pI - pII = 0Ha: pI - pII ≠ 0 H0: pI - pII = 0Ha: pI - pII < 0 H0: pII = 0.008Ha: pII ≠ 0.008 H0: pI - pII = 0Ha: pI - pII > 0 What is the test statistic for this test?test statistic = (Report answer accurate to 2 decimal places.)What is the p-value for this test?p-value = (Report answer accurate to 4 decimal places.)The decision reached is Fail to reject H0 Reject H0 and accept Ha As such, the final conclusion is that The prevalence of the mutation is the same for both species. There is…
Suppose 239 subjects are treated with a drug that is used to treat pain and 53 of them developed nausea. Use a 0.01 significance level to test the claim that more than 20% of users develop nausea. identify the null and alternative hypothesis for this test. Identify the test statistic for this hypothesis test. identify the p-value for this hypothesis test. Identify the conclusion for the hyopothesis test.
A bag of candy contains 5 different types of colored candies; red, green, blue, yellow, and orange. According to the manufacturer, bags should contain an equal number of each color. Students in a statistics class decided to use a chi-square procedure to test the manufacturer’s claim. They opened a bag of candy and recorded the number of candies of each color. The results are shown in the following table. Red Green Blue Yellow Orange 17 24 20 25 14 Which color contributes most to the chi-square test statistic? Red A Green B Blue C Yellow D Orange
Women athletes at a certain university have a long-term graduation rate of 67%. Over the past several years, a random sample of 38 women athletes at the school showed that 23 eventually graduated. Does this indicate that the population proportion of women athletes who graduate from the university is now less than 67%? Use a 1% level of significance.
A researcher is interested to know whether caffeine improves students' test performance. Study participants were divided into three groups: 1) No caffeine before the test 2) Low dose of caffeine before the test 3) High dose of caffeine before the test Below are test results for each group. Conduct ANOVA in Excel to determine if there are significant mean differences between any of the three groups. Assume alpha = 0.05 In your answer, state the null and the research hypotheses and explain whether the results of the ANOVA test led you to reject or fail to reject the null hypothesis. Copy/paste the data below into an Excel Sheet (or Google Sheets) and run ANOVA. Copy/paste the results in the response window below. Be sure to include your interpretation of the results. In your answer, state the null and the research hypotheses and explain…
Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, and then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Among 2198 passenger cars in a particular region, 237 had only rear license plates. Among 325 commercial trucks, 47 had only rear license plates. A reasonable hypothesis is that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars. Use a 0.05significance level to test that hypothesis.
1. Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, and then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Among 2051 passenger cars in a particular region, 227 had only rear license plates. Among 387 commercial trucks, 55 had only rear license plates. A reasonable hypothesis is that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars. Use a 0.10 significance level to test that hypothesis. a. Test the claim using a hypothesis test. b. Test the claim by constructing an appropriate confidence interval. a. Identify the null and alternative hypotheses for this test. Let population 1 correspond to the passenger cars and population 2 correspond to the commercial trucks. Let a success be a vehicle that only has a rear license plate. A. H0: p1=p2 H1: p1<p2 B. H0: p1<p2…
When only two treatments are involved, ANOVA and the Student’s t-test (Chapter 11) result in the same conclusions. Also, for computed test statistics, t2 = F. To demonstrate this relationship, use the following example. Fourteen randomly selected students enrolled in a history course were divided into two groups, one consisting of six students who took the course in the normal lecture format. The other group of eight students took the course in a distance format. At the end of the course, each group was examined with a 50-item test. The following is a list of the number correct for each of the two groups. Traditional Lecture Distance 36 45 31 35 40 45 34 35 33 45 38 36 43 41 a-1. Complete the ANOVA table. (Round your SS, MS, and F values to 2 decimal places and p-value, F crit to 4 decimal places.) Source of Variation SS df MS F p-value F crit Treatment 96.01 1 96.01 5.67 0.0350 Error 203.21 12 16.93 Total 299.21 13…
A major oil company has developed a new gasoline additive that is supposed to increase mileage. To test this hypothesis, ten cars are randomly selected. The cars are driven both with and without the additive. The results are displayed in the following table. Can it be concluded, from the data, that the gasoline additive does significantly increase mileage? Let d=(gas mileage with additive)−(gas mileage without additive). Use a significance level of α=0.05 for the test. Assume that the gas mileages are normally distributed for the population of all cars both with and without the additive. Car 1 2 3 4 5 6 7 8 9 10 Without additive 27.2 13.7 12.5 13.4 14.7 25.5 10.3 13.9 14.5 25 With additive 29.7 15.7 14.1 16.4 17.8 27.8 12.1 15 17.3 28 Step 2 of 5: Find the value of the standard deviation of the paired differences. Round your answer to two decimal places.
A genetic theory says that a cross between two pink flowering plants will produce red flowering plants 25% of the time. To test the theory, 100 crosses are made and 33 of them produce a red flowering plant. Is this strong evidence that the theory is wrong? Carry out the appropriate hypothesis test at the 5% significance level.The appropriate hypothesis for this test is H0: x = 0.25 vs. HA: x ≠ 0.25 H0: p̂ = 0.25 vs. HA: p̂ ≠ 0.25 H0: p = 0.25 vs. HA: p ≠ 0.25 H0: μ = 0.25 vs. HA: μ ≠ 0.25 The test statistic is (to two places after decimal)the p-value is (to three places after decimal)There ___ enough statistical evidence to conclude that the theory is wrong.
When only two treatments are involved, ANOVA and the Student’s t-test (Chapter 11) result in the same conclusions. Also, for computed test statistics, t2 = F. To demonstrate this relationship, use the following example. Fourteen randomly selected students enrolled in a history course were divided into two groups, one consisting of six students who took the course in the normal lecture format. The other group of eight students took the course as a distance course format. At the end of the course, each group was examined with a 50-item test. The following is a list of the number correct for each of the two groups. Traditional Lecture Distance 33 46 38 35 40 44 32 30 31 41 36 31 41 46 Click here for the Excel Data File. a-1. Complete the ANOVA table. (Round your SS, MS, and F values to 2 decimal places and p-value, F crit to 4 decimal places.) a-2. Use a α = 0.05 level of significance, compute the critical value. (Round your answer to 2 decimal places.)…
This is data base of knowledge of 20 medical students about Covid-19 safety Protocol awereness among practicing ENT -Give the Percentage of correct responses in different age and gender -plan a hypothesis test (plan for the test- Theory only) to confirm or disprove that Age and gender have great influence on the Knowledge of student