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If Ho: B1 = 0 is not rejected, what is the best estimate for the value of the response variable for any value of the explanatory variable?
1. There is no way to estimate the value of the response variable
2. The best estimate is the sample mean of y
3. The best estimate is the mode of the sample y values
Many people do not "like" or "trust" single point estimates for things they need measured.
To test productivity quickly, he has his shift foremen record number of defective T-shirts made in randomly sampled week. Critical Value: t =Test Statistic (Show procedure.): t =?
Compute the probability that student eats at fast food restaurant 2 or more times per week?
The remaining 5 were not given the overview. Here are the scores for students in each group:
If you must estimate the population mean within 2 days, how many outside salespeople should you sample? Use the 90 percent confidence level.
the data set toxemia contains information for a sample of 100 infants born in two hospitals in boston. indicators of a
Suppose that a random sample of 14 cars shows an average speed of 24.0 mph, with a sample standard deviation of 2.2 mph. Assume that the speeds of cars are normally distributed. Using the T-table, what is the p-value?
Design an imaginary study or discuss an actual study you've read about that has an experimental or quasi-experimental design that used or would use t-tests or ANOVAs in the data analysis.
What is a p-value in testing hypothesis? How does this p-value help us to decide to/not to reject a Null hypothesis? What might happen if we do not use this p-value in particular, when we are rejecting a Null hypothesis?
The Wilcoxon signed rank test is computed for the data and gives a value W + = 161.5. Using the Normal approximation (without the continuity correction) the P-value.
Formulate a payoff table that specifies the contribution to profit (in dollars) from the sale of the tennis shoes by this department store chain for each possible purchase decision.
Do these results suggest that the different therapies have different effects on mental health? (Use the .05 level.) a. Use the five steps of hypothesis testing.
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