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One kind of plant has only blue flowers and white flowers. According to a genetic model, the offspring of a certain cross have a 75% to be blue-flowering, and a 25% chance to be white-flowering, independently of one another. Two hundred seeds of such a cross are raised, and 142 turn out to be blue-flowering. Are the data consistent with the model?
Our sample size is 17. Which value most accurately represents the critical value of Z that you would use to plug in for your interval?
Does the data set represent a sample or a population? If it is a sample, describe the population from which it has been drawn.
At the .10 significance level, can we conclude that there is a difference in the length of time the two types of treatment lasted?
What the degree of freedom tells us? What are the degree of freedom for t- test, X^2-test, and for F-twst?
Determine mean and standard deviation for number of erroneous returns per batch.
What are the null and alternative hypothesis for this? What is a type II error in context of this test? Suppose that the researcher deceides not to reject the null hypothesis what sort of error might he be making?
A logistic regression model was used to assess the association between CVD and obesity. P is defined to be the probability that the people have CVD.
The gambler is paid later as follows, depending on the number of winners he picked. What is his expected gain? Remember, a loss is a negative gain, and that the bookie keeps the gambler's $20.
Imagine there are exactly m opportunities to cross safely by the time the nth shock occurs. What is the probability that the mth opportunity is a close call (that it occurs immediately before the nth shock).
Use the least-squares method to compute the regression of coefficients b0 and b1.
My son plays for the Hooks and his average is .333. Therefore I am going to assume the probability of him getting a hit is .333 for each time he bats. In a recent game he batted three times.
Is there a significant difference in sales dollars of hats between the west side and east side stores at the 5 percent level of significance? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic and stat..
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