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A random sample obtained from a population has a mean of µ=100 and a standard deviation of σ = 20. The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error for the two samples.
If a time series is stationary without a linear trend or the seasonal component, which of the following forecasting methods may be suitable.
Compute the value of the test statistic (to 2 decimals).
Scatter plot, Correlation coefficient and Regression equation - Do a complete regression analysis by performing the steps below
Find the value for the correlation coefficient r.
Draw a tree diagram representing the data. What is the probability that a vehicle stolen in this city will never be recovered?
Determine the probability that person selected has blood type O? Given that person selected is a male, determine the probability that their blood type is AB?
Analysis of variance- One way classification - Are there differences among these 3 drugs with respect to how long they are retained in the body?
Set up dummy coded dummy variables to contrast each of the other groups to Group 2, medium Anxiety; run a regression to predict exam performance (Y) from these dummy coded dummy variables.
Select the suitable hypothesis.H 0 : π ≥ .052; H 1 : π 0 if z
What is your conclusion? Are the two variables independent?
Find out coefficient of correlation between variables. Interpret the value.
Is there evidence of a difference in objection to sharing information among the organizational groupings? (use α = 0.05)
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