Mr. Richard has collected the grades of Quantitative methods final examination for 9 students inyear 2017 as follows:a.642278634455395864Required:i.Construct the arithmetic mean and standard deviation for the above data.ii.Estimate the 99% confidence interval for the mean grades of quantitative methods finalexamination.Mr. Richard has used a new teaching method for quantitative methods. In the previousyear the average grade was 55. Test whether the new teaching method has significantlyincreased students grades at 0.01 significance level.ii.Explain the meaning of Type I and Type Il errors and determine the type of error mighthave been made in part (biji) above.iv.

Here AS PER POLICY I HAVE CALCULATED 3 SUBPARTS Here sample size n = 9 Population standard…

Answered: i. Construct the arithmetic mean and…

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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After the active learning or passive learning class, students rated the extent to which they agreed with the statement “I feel like I learned a great deal from this class.” Ratings were on a 5-point scale with greater numbers indicating greater agreement. For the 142 students in the active learning environment, the mean rating was 3.338 with a standard deviation of 0.922. For the 154 students in the passive learning lecture, the mean rating was 3.753 with a standard deviation of 0.873. Test whether ratings on feelings of learning are significantly lower, on average, with active learning. Test Statistic? P-Value ? What do you conclude? Do not reject H0. We have evidence that mean feelings of learning are lower with active learning. Reject H0. We do not have evidence that mean feelings of learning are lower with active learning. Do not reject H0. We do not have evidence that mean feelings of learning are lower with active learning. Reject H0. We have evidence that mean feelings of…
Suppose that Dietitians recently recommended a 400 cal per meal and take her children of the age of the data set. To see if both groups adhere to the guideline follow the steps to develop and test a statistical hypothesis. Test to see if us groups means are different from 400 calories. You have two data sets so you'll be completing the process twice. Use 0.05 as a level of significance and make sure to report any important statistic with your results (e.g., mean of each group, standard deviation of each group, test stastistic (are you using t or z?), rejection region and p value). Data: Children Participated Children Did Not Participate 435.16 414.61 338.99 503.46 488.73 425.22 590.28 288.77 582.59 184 635.21 299.73 249.86 350.65 441.66 394.94 572.43 261.55 357.78 295.28 396.79 139.69 298.38 462.78 282.99 179.59 368.51 301.75 388.59 436.58 256.32 371.39 408.82 469.02 424.94 378.09 477.96 287.31 428.74 448.55 432.52 332.64 428.27…
Is the mean length of adult invasive Lionfish in the Atlantic coast of South Carolina greater than 355.6mm? (This is just the research question I using please just answer question 2 and 3 please.) Lower limit: 429.737 Upper limit: 445.163 Question 2. Interpret the above confidence intervals: Question 3. If you have one sample group, determine whether the value in your research question (the value which is compared to the population mean) is within the confidence interval or not. Then describe what it implies. If you have two groups of data, determine whether the confidence intervals of the two groups overlap or not. Then describe what that implies.
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Use the following scenario to answer the next 6 questions. An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 30 engines and the mean pressure was 4.8 psi with a standard deviation of 1 psi. If the valve was designed to produce an overall mean pressure of 5.0 psi, is there sufficient evidence at the 10% level of significance that the valve performs below specifications? Choose the statement that matches your decision & conclusion. Group of answer choices Fail to reject the null: there is NOT sufficient evidence that the valve performs below specifications. Fail to reject the null: there IS sufficient evidence to conclude that the valve performs below specifications. Reject the null: there is NOT sufficient evidence that the valve performs below specifications. Reject the null: there IS sufficient evidence that the valve performs below specifications.
The commercial for the new Meat Man Barbecue claims that it takes 20 minutes for assembly. A consumer advocate thinks that the assembly time is lower than 20 minutes. The advocate surveyed 10 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 19 minutes. The standard deviation for this survey group was 2.3 minutes. What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer H₁: ? Select an answer ✓ c. The test statistic ? ✓ = d. The p-value= e. The p-value is ? ✓ a f. Based on this, we should Select an answer the null hypothesis. (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.)
A hospital president claims that the average Salary of registered nurses at her hospital is more than $57,000. You test this claim by surveying 37 registered nurses at this hospital and find they have a mean salary of $57,425. Assume the population standard deviation is $1750 at the 0.10 level of significance is there enough evidence to support the claim of the hospital president?
A psychologist wants to demonstrate the effectiveness of ACT therapy for the treatment of depression. 30 people who were seeking treatment for depression asked to complete the Beck depression inventory (BDI) before the first sessionof therapy and again after one month of therapy. Which statistical test would be best to determine if there is a significant difference between measures? One sample t-test Dependent samples t-test Independent samples t- test ANOVA
A survey found that the mean commute time is 25.4 minutes for the fifteen largest U.S. cities.The Austin, TX, chamber of commerce feels that Austin's commute time is less. A survey of 25 randomly selected commuters had a mean of 22.1 minutes with a standard deviation of 5.3 minutes. At the 10% level, does the survey data suggest that Austin commute time is significantly less than the national average? Your answer should have the following: 1). Null hypothesis:2). Alternative hypothesis: 3). Test Type: P-test
10.
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