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A die is rolled 8 times. Given that there were 3 sixes in the 8 rolls, what is the probability that there were 2 sixes in the first five rolls?
What percentage of these kettles will last between 90 and 110 months? The appliance giant offers a replacement guarantee on kettles which malfunction within a certain time of the purchase.
Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.
We might raise two issues with this test. First, does the data come from a random sample from some population? Second, what is the relevant population?
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
Plants and hummingbirds. Different varieties of the tropical flower Heliconia are fertilized by different species of hummingbirds.
another summary measure is the age-adjusted mean which is an estimate of the mean fvc value in a reference population
The One-Way ANOVA applet lets you see how the F statistic and the P-value depend on the variability of the data within groups and the differences among the means. The black dots are at the means of the three groups. Move these up and down until..
a group of 49 randomly selected students has a mean age of 22.4 years with a standard deviation of 3.8. construct a 98
Explain what you know about hypothesis and hypothesis testing. Describe the five-step hypothesis-testing procedure? Discuss the concepts of Type I and Type II Errors?
A group of 200 adults aged 21 to 50 were selected from those entering Fit Right Health stores in Washington State, and were randomly divided into two groups. One group was given a herb and the other a placebo. After 6 months, the number of respira..
Identify one contemporary technology (e.g., the cell phone), and discuss how it has affected the world we live in. How do you see this technology affecting nation-states as a whole?
Write a Results section in current APA style describing the outcome - difference in satisfaction ratings in an assisted living facility between residents who had a pet with them vs. those who did not have a pet.
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