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Three different instructional techniques are being considered for training mechanics to perform a difficult emissions-reduction adjustment on fuel-injection engines. Each of 60 mechanics is randomly assigned to receive one of the training techniques.
For the 20 trained by technique A, 70% are able to perform the adjustment successfully on the first try.
For mechanics trained by techniques B and C, the respective percentages are 50% and 65%. At the 0.05 level, can we conclude that the three techniques are equally effective?
Use the steps of hypothesis testing; (b) figure the effect size for the study; And (c) explain your answers to parts (a) and (b) to someone who has never had A course in statistics.
Refer to the previous two exercises. PROC GENMOD in SAS reports the maximized log likelihood as 3475.19 for the model of mutual independence (df = 11), 3538.05 for the model of homogeneous association (df = 5), and 3539.58 for the model containing..
a teacher plans to construct a 25 question exam from previous exams in which there are 50 true false questions and 80
What is the probability that a random sample of 36 students will have a mean verbal sat score that is great than 535?
What percent of the graduates are white?- What percent of the graduates are planning to attend a 2-year college?- What percent of the graduates are white and planning to attend a 2-year college?
Derive an expression for the moment-generating function of a Rayleigh random variable whose PDF is:
Computing the mean value for the given data - What is the new mean for the class and frequency distribution graph, what type of graph should be used
A business invests $10,000.00 in a savings account for 2 years, At the beginning of the second year, an additional $3500.00 is invested, At the end of the second year, the account balance is $15,569.75. What is the annual interest rate?
Use the auxiliary variable approach to model this problem and write a short memo to the marketing manager explaining the solution and sensitivity information.
in the following functions evaluate c so that fx will be the probability density functiona. fx cx4 xgt1b. fxtheta cln
Conclude that is there a difference in the two amounts?
How many more days should be included in the sample to be 95% sure the population mean μ is within $50 of the sample mean x?
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