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Why is effective sampling important when performing a hypothesis test? What could happen if your sample is not appropriate to your study?
By using 0.05 level of significance, is there any evidence of difference in mean life of bulbs produced by two kinds of machines?Calculate p-value and interpret its meaning.
Draw the suitable 2x2 table, compute and interpret suitable measure of association.
What is your conclusion regarding null hypothesis?
A sample of 64 Atlanta consumers showed a mean quarterly water bill of $51 with a sample standard deviation of $12. At α = .05, does the Atlanta sample support the conclusion that above-average rates exist for this private water system?
From the given probability distribution finite the mean and standard deviation.
A regression model between sales (Y in $1,000), unit price (X 1 in dollars) and television advertisement (X 2 in dollars) resulted in the following function: = 7 - 3X1 + 5X 2 For this model SSR = 3500, SSE = 1500, and the sample size is 18...
Report a table of marginal means for each level of each of the three factors.
Let be the average of the pay you receive for the first and second week. Find the sampling distribution
Indicate at which point flat-of-the-curve medicine is experienced in the following example (imagine that antibiotics have been prescribed for a given population of 1,000 elderly persons).
Describe why the normal distribution can be used as an approximation to binomial distribution. What conditions should be met to use the normal distribution to approximate the binomial distribution? Why is a correction for continuity essential.
What is the standard deviation of expected returns for Stock X? For Stock Y?
When the level of confidence and sample standard deviation remain the same, a confidence interval for a population mean based on a sample of n = 100
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