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Assume that an ecologist is studying the effects of the insecticide DDT on wild birds in Sumatra. DDT sprayed on insects and vegetation subsequently eaten by female birds seems to affect the thickness of their eggshells and thus affects the protection of the embryonic birds. Assume the ecologist knows that the mean eggshell thickness in untreated birds (birds that have not eaten matter sprayed with DDT) is 330 microns and the variance is 2500 microns squared. Assume also that the thickness follow a normal distribution. The ecologist takes a sample of 16 eggshells and finds a sample mean of 290. The ecologist is interested in seeing if the spraying of DDT has any effect on the eggshells. (a = .05 ) a.) Ha: Ha: b.) Test statistic: c.) P-value: d.) Conclusion:
In a survey, 55% of the voters support a particular referendum. If 40 voters are chosen at random, and X is the number of voters that support this referendum, find the mean and variance of X.
How much would be the loan proceeds from a discount loan of $1,000 at 3.5% for 230 days? (Be sure to round the time to the nearest hundredth. Example: 250 days divided by 365 days is .68, not .684.)
They want you to determine what the data indicate about this.In this problem I am having an issue trying to determine what equation to use to solve. Is this a one or two way ANOVA or should I just use a z-test to solve?
Jen's dog broke off her six-inch-long pencil at a random point on the pencil. Find the density function and the expected value of the ratio of the lengths of the shorter piece and the longer piece of the pencil.
Write the multiple regression equation and what is the coefficient of multiple determination?
an article in the journal of composite materials vol 23 1989 p. 1200 describes the effect of delamination on the
a suppose you conduct a significance test and decide to reject the null hypothesis ho at the alpha.05 level. if you
If you have n independent flips of a coin with probability p of landing heads. And a changeover occurs whenever an outcome differs from the one preceding it.
if the bonferroni procedure is used to maintain an overall significance level of .05 for three comparisons the
it is estimated that 0.5 of the callers to the customer service department of dell inc. will receive a busy signal.
a botanist wishes to test the null hypothesis that the average diameter of the flowers of a particular plant is 9.6cm.
the roulette wheel has 38 compartments of which 18 are red 18 are black and two are green. as the wheel is spun a small
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