Question Number (6) U test is conducted in the pilot plant, yielding the data reported in Table 1. Is there any6. The effects of two catalysts on the mean yield of a chemical process are being investigated.Mdifference between the mean yields from the two catalyst at the 5% significance level?Assume the two population variances are equal.QuatUTNTable 1Observation&UTM_UTMCatalyst 1Catalyst 2191.5089.192OM OUTM94.1890.95392.18490.4695.39593.2191.79697.19MOUTM89.07797.0494.7291.07889.2192.75UTMUTM UTM

Claim : There is difference between the mean yields from the two catalyst

Answered: | 6. The effects of two catalysts on…

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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The effects of two catalysts on the mean yield of a chemical process are being investigated.A test is conducted in the pilot plant, yielding the data reported in Table 1. Is there anydifference between the mean yields from the two catalyst at the 5% significance level?Assume the two population variances are equal.
Researchers were studying the effect of protein on weight gain in rats. They examined 19 female rats between 28 and 84 days after birth. 12 were fed on a high protein diet and 7 on a low protein diet, and the weight gain of each rat was recorded. The researchers hypothesized that a high protein diet would cause more weight gain, on average. Run the appropriate test in Excel, assuming the population variances are unequal. Use an a = .05 significance level. Submit the…
A data set from a study that examined the effect of a specific diet on blood pressure is below. Participants (n = 72) were randomly assigned either to a group that was put on the diet (Diet = Present) or to a group that was not put on the diet (Diet = Absent), and researchers wanted to know whether the diet had a significant impact on blood pressure. Evaluate the homogeneity of variance assumption for the test and report the results (i.e., is the assumption reasonable for this analysis/data set?). Biofeedback Drug Diet BldPres Present X Absent 170 Present X Absent 175 Present X Absent 165 Present X Absent 180 Present X Absent 160 Present X Absent 158 Present X Present 161 Present X Present 173 Present X Present 157 Present X Present 152 Present X Present 181 Present X Present 190 Present Y Absent 186 Present Y Absent 194 Present Y Absent 201 Present Y Absent 215 Present Y Absent 219 Present Y Absent 209 Present Y Present 164 Present Y Present…
In a greenhouse it is desired to investigate the effect of 6 concentrations of a Biostimulator for the growth of sugarcane seedlings for the production of sucrose for a month with controlled temperature, relative humidity and hours of light. a) Through a randomized complete block design experiment, perform the Analysis of Variance for a significance level of α = 0.01 and α = 0.05. b) Interpret the results of the analysis of variance table
The number of grants of carbohydrates contained 1-ounce servings of randomely selected chocolate and non-chocolate candy is listed below. Is there evidence to conclude that there is a difference between in mean carbohydrates between chocolate and non-chocolate candies? Use the unequal variance T-test and significant level =.05. Assume carbohydrates per serving is normally distributed for both types of candy. Chocolate:29,25,17,36,41,25,32,29,38,34,24,27,29 Non-chocolate: 41,41,37, 29,30,38,39,18,29,55,29 a.) State the null and alternative hypotheses. b.) Identify test statistic and p-value. c.) Make a decision, reject Ho or not? D.) Summarize the results in a sentence.
A study was conducted using 50 mobile network users who volunteered to participate in a research as the entry of the third telco player in the country is on its way. One of the variables studied was the data connection speed in the previous month. Based on the data in the following table, is there a significant difference between the connectivity speeds of the two present mobile networks during the previous month? Use a 5% level of significance and assume that the population variances are equal. 1. The alternative hypothesis for the test would be? 2. The alternative hypothesis for the test would be? 3. What is the computed value of the test statistic? 4. What would be your decision?
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 210 engines and the mean pressure was 6.7 ibs/square inch. Assume the variance is known to be 0.64. If the valve was designed to produce a mean pressure of 6.8 ibs/square inch, is there sufficient evidence at the 0.1 level that the valve does not perform to the specifications? State the null and alternative hypothesis for the above scenario.
Two machines (A and B) are used to fill plastic bottles with liquid laundry detergent. By default, the variability of liquid filled should be in a normal distribution form and both machines should operate similarly. If there is any difference, they may need to be calibrated. The output below shows the production result obtained from 14 bottles of Machine A and 12 bottles of Machine B: LOOK TO THE 2 HOPTPS. Q) At the 10% significance level, test whether calibration need to be made or not.
What source of variation is found in an ANOVA summary table for a within subjects design that is not in an ANOVA summary table for a between subjects design. What happens to this source of variation in a between-subjects design?
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 130 engines and the mean pressure was4.4lbs/square inch. Assume the variance is known to be 0.49 . If the valve was designed to produce a mean pressure of4.3lbs/squareinch, is there sufficient evidence at the 0.02 level that the valve performs above the specifications? State the null and alternative hypotheses for the above scenario.
In the attached picture, the data for the perceived level of stress of 30 employees is recorded. Also, researchers exposed the employees to either early or late stressors before completing the stress questionnaire. Attached is also the output for the data after conducting a two way ANOVA Discuss the two kinds of variance here, and indicate how they are compared to conclude a significant difference.
Researchers compared protein intake among threegroups of postmenopausal women: (1) women eating astandard American diet (STD), (2) women eating a lactoovo-vegetarian diet (LAC), and (3) women eating a strictvegetarian diet (VEG). The mean ± 1 sd for protein intake(mg) is presented in Table 12.29.*12.1 Perform a statistical procedure to comparethe means of the three groups using the critical-valuemethod and What is the p-value from the test performed

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