Please help to do these questions, Thank you so much! Three different brands of tires were...
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same random sample of 8 cars. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the left front...
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same random sample of 12 cars. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the left front...
Four brands (A, B, C and D) of hand-held calculators are to be compared for the time it takes to compute the sum of 25 numbers. Thirty-two (32) students were selected at random with 8 assigned to each brand of calculator. A partial ANOVA table is as follows. f Source | d.f. Sum of Squares Mean Squares Between Calculator Brands Within Brands 15.40 Total (a) Write a model for this experiment and define all terms. (b) The brand averages in...
In an experiment to investigate the performance of four different brands of spark plugs intended for use on a 125-cc motorcycle, five plugs of each brand were tested, and the number of miles (at a constant speed) until failure was observed. A partially completed ANOVA table is given. Fill in the missing entries, and test the relevant hypotheses using a .05 level of significance. (Give the answer to two decimal places.) Variation of dfSquares Sum of Mean Squares Square Erro...
2. Managers of a transit system want to evaluate four types of tires with respect to wear. Three buses are being used for a test drive with one tire of each type placed randomly on the four wheels of each bus. The tread wear in millimeters 3hj for tire type J installed on bus i is measured after 1000 miles. The data are given in the table below Tire type j Bus 23 4 9.1 17.1 20.8 11.8 13.4 20.3...
The lumen output was determined for each of I = 3 different brands of lightbulbs having the same wattage, with ) = 7 bulbs of each brand tested. The sums of squares were computed as SST = 593.9 and SSE = 4777.5. State the hypotheses of interest (including word definitions of parameters). uj = true average lumen output for brand i bulbs Ho: ui = u2 = 43 Ha: at least two ui's are unequal uj = true average lumen...
The following data are from a completely randomized design. Treatment 145 145 145 149134 151 140 129 Sample mean Sample variance a. Compute the sum of squares between treatments. 159 310 142 108.8 134 145.2 b. Compute the mean square between treatments. c. Compute the sum of squares due to error d. Compute the mean square due to error (to 1 decimal), e. Set up the ANOVA table for this problem. Round all Sum of Squares to nearest whole numbers....
3. In a completely randomized design, 5 experimental units were used for each of the four levels of the factor. F Sum of Squares 385.12 Degrees of Freedom Source of Variation Treatment Error Total Mean Square 1563.71 a. Complete the ANOVA table. b. Find the critical value at the 0.05 level of significance from the F table for testing whether the population means for the three levels of the factors are different. c. Use the critical value approach and a...
please do it carefully thanks for solving thank you so much Q1: In a completely randomized experimental design, 7 experimental units were used for each of the 5 different levels of treatments: Degrees of Freedom Mean Square Source of Variation Sum of Squares Between Treatments Error (Within 22.3 Treatments) 30.5 (A) (0) (G) 10 Total (0) a. Complete the above ANOVA table by computing the values of (A) to. b. At Q -0.05, test the hypothesis that the population treatment...
e. Set up the ANOVA table for this problem. Round all Sum of Squares to nearest whole numbers. Round all Mean Squares to one decimal places. Round F to two decimal places. Source of Variation Sum of Squares Degrees of Freedom Mean Square F Treatments Error Total f. At the α-.05 level of significance, test whether the means for the three treatments are equal The p-value is less than.01 What is your conclusion? Select The following data are from a...