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A study was undertaken to assess how both majority and minority groups perceive the degree of participation of African-American models in television commer- cials. The authors designated the three groups in this study as European Americans, African Americans, and Other. The purpose of this research was to determine if there were any statistically signi?cant differences in the average perceptions within these three groups of the extent of the role played by African-American models in commer- cials the subjects viewed. The results of the ANOVA carried out were summarized as F (2, 101) = 3.61.6 Analyze this result and state a conclusion about this study.
If the manufacturer stocks 100 components, what is the probability that the 100 orders can be filled without reordering components?
If the null hypothesis is true, state the statistical distribution of the test statistic. Use α=0.05 and perform all 5 steps of hypotheses testing for complete credit.
a soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.05 in.a determine the
the frequencies of different blood types of 200 people who volunteered at a plasma center is given in the table.blood
Compare the mean absolute error, root mean square error, and the mean absolute percent of error for all four of these forecasting techniques - what do these statistics tell you about the forecasts? Which one is the best forecast and why?
a non profit company concerned with the school dropout rates in a nearby state has designed a tutoring program aimed at
determine the point estimate of the population the margin of error for the following confidence interval and the number
Ssample by constructing a histogram and finding the sample mean and standard deviation, are we investigating the sampling distribution of the mean? why or why not?
In a simple linear regression analysis of 18 data points the following ANOVA table was found.
Sample of 100 measurements were taken to analyze concentration of impurities in a product. Calculated sample mean was 65 ppm (parts per million). Assuming that population standard deviation is 20 ppm, estimate margin of error and confidence interv..
at a temperature of 25 degrees c the resistances of a type of thermistor are normally distributed with a mean of 10000
consider a hypothesis test of difference of means for two independent populations x1 and x2. suppose that both sample
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