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A recent study by the american automobile dealers' association revealed the mean amount of profit per car sold for a sample of 20 dealers was $290, with a standard deviation of $125. A) what is the point estimate of the population mean? B) develop a 95% confidence interval for the population mean.
An experiment is designed using three levels of ground clutter and two filter types. The experiment is performed by randomly selecting a treatment combination
What is the relationship between a confidence interval and a single sample, two-tailed hypothesis test? How are they the same? How are they different?
Can researcher conclude that humidity has significant effect on eating behavior? Use two-tail test with α = .05. Calculate estimated Cohen's d and r2 to measure size of treatment effect.
Assume that the population of heights of treated plants is normally distributed with mean. Based on the sample, can it be concluded that is different from centimeters? Use the level of significance. Perform a two-tailed test. Then fill in the table..
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
If we believe the manufacturer's assertion, what is the probability that at most 3 of the 6 seeds that were planted will germinate?
What are the four assumptions for the chi-square tests? What are the hypothesis when conducting the chi-square tests for goodness-of-fit?
What is the probability that a particular driver had exactly two speeding violations?
Calculate the range, variance, and standard deviation for these sample data.
Data analysis must be completed using a statistical software package - either Statistix for Windows, with the MegaStat add in, SPSS, SAS, R or any other legitimate software package.
They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
The chief of security for the Mall of the Dakotas was directed to study the problem of missing goods. He selected a sample of 100 boxes that had been tampered with and ascertained that for 60 of the boxes
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