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The eating habits of 12 bats were examined in the article "Foraging Behavior of the Indian False Vampire Bat" (Biotropica [1991]: 63-67). These bats consume insects and frogs. For these 12 bats, the mean time to consume a frog was x = 21.9 minutes. Suppose that the standard deviation was s = 7.7 minutes. Construct and interpret a 90% confidence interval for the mean suppertime of a vampire bat whose meal consists of a frog. What assumptions must be reasonable for the one-sample t interval to be appropriate?
your score on a statistics tests is 63 and on your biology test you made a 23. the mean in statistics was 60 with a
The first part of the investment earned 8% interest, the second 6%, and the third 9%. Total interest from the investments was $7200. The interest from the first investment was 4 times the interest from the second. Find the amounts of the three par..
1. a study of commuting times reports the travel times to work of a random sample of 17 employed adults in new york
Why is it important to check the 10% condition before calculating probabilities involving x¯? (a) To reduce the variability of the sampling distribution of x¯.
you have to use matlabor just explain the steps to calculate these problems and submit it with your answersuppose that
Significant? Public health officials believe that 90% of children have been vaccinated against measles. A random survey of medical records at many schools.
The number of hours a lightbulb burns before failing varies from bulb to bulb. The population distribution of burnout times is strongly skewed to the right.
One-way analysis of variance is a method for comparing several population means, when the data are from independent samples. It a test that examines the relationship between a quantitative response variable and a categorical explanatory variable, ..
Perform a hypothesis test to see whether the means are significantly different using a significance level of 0.05. Explain your conclusion clearly.
Which of the following conditions must be met to conduct a test for the difference in two sample means? Suppose we test the difference between two proportions at the 0.05 level of significance. If the computed z is -1.07, what is our decision?
let x be a random variable that represents the ph of arterial plasma. for healthy adults the mean of the x distribution
a group of researchers studied the effect of global environmental change on grazing lands. their article reported the
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