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Conceptually we would expect the probability of newborn males and females to be the same. However, census reports indicate that the ratios of males and females in various countries do not conform to the theoretical prediction. What do you think accounts for this variation? Can you think of other cases where the expected probabilities do not quite agree with the empirical values?
At a = 0.05, can you reject claim that at least 52% of adults are more probable to purchase a product when there are free samples?
Determine the 95% confidence interval for your estimate what data have you utilized as the basis of your predictions what suppositions have you made.
Let ≥ represent the true average area (in square feet) of these apartments. What are the appropriate null and alternative hypotheses?
Confidence interval for the population mean - Prepare a 99% confidence interval for the population mean.
Use relative frequencies to estimate the probability that a seed will germinate, What is your estimate?
An SRS of 100 of a certain popular model car in 1993 found that 20 had a certain minor defect in the brakes. An SRS of 400 of this model car in 1994 found that 50 had the minor defect in the brakes. Let p1 and p2 be the proportion of all cars of t..
Find out the probability
Using symbols state hypotheses (H 0 and H 1 ) for two-tailed test. Sketch suitable distribution and locate critical region for a = 0.05.
Give all steps of a test of the hypothesis that the corresponding population proportions are equal.
Define the decision rule. Calculate the value of the test statistic.
Find out the forecast value utilizing three month moving average method, weighted moving average method, exponential smoothing and regression methods.
A random sample of 36 drinks from a soft drink machine has an average content 7.6 ounces with an standard deviation of 0.48 ounces. Test the hypothesis ounces against the alternative hypothesis at the 0.05 level of significance.
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