Xzy Section 5.4 - QNT/275T: Statistics X/chapter/5/section/4ision Making home >tween two population meansypothesis test for the difference between two population means.Jump to level 1The mean voltage and standard deviation of 12 batteries from each manufacturer weremeasured. The results are summarized in the following table.Sample meanManufacturer voltage (millivolts)CHABCheck+106101What is the test statistic? Ex: 0.123NextWhat type of hypothesis test should be performed? SelectSelectLeft-tailed z-testPaired t-testWhat is the number of degrees of freedom? Ex: 25 Two-tailed z-testUnpaired t-testPopulation standarddeviation(millivolts)3Does sufficient evidence exist to support the claim that the voltage of the batteries madeby the two manufacturers is different at the a = 0.05 significance level? [Select v25

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Answered: zy Section 5.4- QNT/275T: Statistics X…

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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Use the following ANOVA table for regression to answer the questions. Analysis of Variance Source DF SS MS F P Regression 1 291.4 291.4 2.01 0.158 Residual Error 174 25230.0 145.0 Total 175 25521.4 Give the F-statistic and p-value.Enter the exact answers.The F-statistic is =The p-value is =
Please answer and show all work. Thank you!!!
Methyl t-butyl ether (MTBE) is an organic water contaminant that often results from gasoline spills. The level of MTBE (in parts per billion) was measured for a sample of 12 well sites located near the ship channel during a recent spilI. The data are: 150, 376, 38, 12, 11, 134, 12, 251, 63, 8, 13, 107. (a) Find the sample mean and the sample standard deviation. (b) Construct and interpret a 91.85% and 98.15% confidence interval for the population mean by using the following equations: B, = x – t - - and By = x +t N sample N sample (c) Which confidence interval is wider and why?
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 160160 engines and the mean pressure was 7.17.1 pounds/square inch (psi). Assume the population standard deviation is 1.01.0. If the valve was designed to produce a mean pressure of 6.96.9 psi, is there sufficient evidence at the 0.010.01 level that the valve performs above the specifications? Step 4 of 6 : Find the P-value of the test statistic. Round your answer to four 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"
* Question Completion Status: QUESTION 12 In a random sample of 10 adults each of them ate 100 g of dark chocolate and in another random sample of 15 adults each of them a chocolate. After one hour their blood plasma antioxidant capacity was measured and the summary statistics are given below. ate 100 g of milk Sample standard deviation 6.2 7.2 Sample mean Dark chocolate (DC) Milk chocolate (MC) 171.5 160.0 At 5% significance level do the data provide sufficient evidence that dark chocolate produces a higher mean level of total blood plasma capacity than milk chocolate? Assume that the population distributions are normal with equal variance. antioxidant a. The altemative hypothesis is H1: PDarkc (
A researcher collects data that represents the average number of hours of sleep in the last two nights by 8 depressed patients and 9 non-depressed patients. The researcher is interested in whether the two groups reliably differ in the amount of sleep they get. Use Jamovi to calculate t-obt and the p value.
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refer to elementary statistics 14th ed data set 3 "ANSUR II 2012" on statdisk..org for the following Based on the results of the 1988 survey of U.s Army personnel the mean height of males is 1714.4 mm with standard deviation of 90.01. use the heights of the 4082 males to test the claim that this sample collected in 2012 is from a population with a mean height greater than 1714.4 mm. use a 0.05 significance level. Does it appear that male army personnel were taller in 2012 than in 1988? List the nell and alternative hypothesis, sample and population mean, proportion, standard deviation, test statistic, critical value, p-value, and alpha value.
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You may need to use the appropriate technology to answer this question. Information regarding the ACT scores of samples of students in three different majors is given below. esc Sample Size 68°F Clear Average Sample Variance ? (a) Compute the overall sample mean . 29.5 X Between Treatments Management Within Treatments Total f2 12 26 f3 17 # Source of Variation Sum of Squares * (b) Set up the ANOVA table for this problem including the test statistic. (Round your mean squares to four decimal places and your F statistic to two decimal places.) Major Finance 000 F 9 23 $ 6 (c) Using a = 0.01, determine the critical value of F. (Round your answer to two decimal places.) f5 Accounting (d) Using the critical value approach, test to determine whether there is a significant difference in the means of the three populations. O We should not reject H. and therefore can conclude that there is a significant difference among the means of the three populations. We should not reject Ho and therefore…

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