A school district uses four different methods of teaching their students how to read.They want to find out if there is any significant difference between the reading scores achieved using the four methods.It creates a sample of 8 students for each of the four methods.The reading scores achieved by the participants in each group are as follows:Method 15187504879615354SUMMARYRequired:Complete the ANOVA tables below:GroupsMethod 1Method 2Method 3Method 4ANOVASource of VariationBetween GroupsWithin GroupsTotalMethod 282919280Since p-value is52797374CountSS00 00 00 0083333888Method 37984749863838558Sumalpha483623624575dfMethod 48580657167Average60.37577.8757871.875Alpha516393rejectMSVariance214.2678571157.5535714164.5714286181.5535714F0.05the null hypothesis.SSP-valueF crit

The given data is as follows: Method 1Method 2Method 3Method…

Answered: A school district uses four different…

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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A high school principal wanted to know if there was a difference in absences for 9th grade, 10th grade, 11th grade, or 12th grade among students with less than a 2.0 GPA. She took a random sample of n = 5 students from each grade and compared absences among the four grades using ANOVA. The data are below:
Describe the different ways that within-subjects designs are used to compare two or more treatment conditions, identify the statistical techniques that are appropriate for each application, and explain the strengths and weaknesses of each application.
A start-up cell phone applications company is interested in determining whether household incomes are different for subscribers to two different service providers. A random sample of 25 subscribers to each of the two service providers was taken, and the annual household income for each subscriber was recorded. The partially completed ANOVA table for the analysis is below. Complete parts a and b below. 2 Click the icon to view the partially completed ANOVA table. a. Complete the ANOVA table by filling in the missing sums of squares, the degrees of freedom for each source, the mean square, and the calculated F-test statistic. ANOVA Source of Variation SS DF MS F Between groups 3,233,927,586 ? ? ? Within groups ? ? ? ? Total 9,519,942,048 ? ? ? (Round sums of squares, degrees of freedom, and mean squares to the nearest integer as needed. Round F to two decimal places as needed.) b. Based on the sample…
State the two-way ANOVA identity for degrees of freedom and interpret its meaning with regard to partitioning the total degrees of freedom in the data.
A kilo restaurant implemented a change in the composition and presentation of its dishes. We want to assess whether the average weight of meals served is greater after the changes, compared to the previous average, which was 640. For this purpose, the weights of dishes from a random sample of 10 customers were taken. The average weight of dishes in the sample was 656 and the variance 144. Use a statistical test for the evaluation. Adopt a significance level of 10%. a. What is the value of the test statistic? b. What range of values is the p-value in? c. At the 10% significance level, can you reject the null hypothesis?
Identify whether the studies described here are based on (1) single samples, (2) paired samples, or (3) independent samples. Cardiovascular disease risk factors are compared in husbands and wives. A nutritional exam is applied to a random sample of individuals. Results are compared to the results of the whole nation. An investigator compares vaccination histories in 30 autistic schoolchildren to a simple random sample of non-autistic children from the same school district.
7. please help a through d.
2. Interpret this data.
Acne is a common skin disease that affects most adolescents and can continue into adulthood. A study compared the effectiveness of three acne treatments and a placebo, all in gel form, applied twice daily for 12 weeks. The study's 517 teenage volunteers were randomly assigned to one of the four treatments. Success was assessed as clear or almost clear skin at the end of the 12 week period. The results of the study can be seen in the table below. Using the appropriate statistical test, determine if there is significant evidence that the four treatments perform differently. If so, how do they compare.
ShopEasy Inc. is a specialty e-tailer that operates 87 catalogue websites on the Internet. Larson Brown, Sales Director, feels that the style (colour scheme, graphics, fonts, etc.) of a website may affect its sales. He chooses three levels of design style (neon, old world and sophisticated) and randomly assigns six catalogue websites to each design style. Analysis of Larson's data yielded the following ANOVA table: Source of Variation Between Groups Within Groups Total SS 19.43 2.85 O 3.68 O 19.45 O 3.57 df 68102.33 2 34051.17 Using a = 0.05, the critical F value is MS 29177.67 15 1945.178 97280 17 F

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