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Is status related to a student's understanding of science? The article "From Here to Equity: The Influence of Status on Student Access to and Understanding of Science" (Culture and Comparative Studies [1999]: 577- 602) described a study on the effect of group discussions on learning biology concepts. An analysis of the relationship between status and "rate of talk" (the number of on-task speech acts per minute) during group work included gender as a blocking variable. Do you think that gender is a useful blocking variable? Explain.
a professor is interested in determining if attending college influences the level at which an individual cooperates
In the next three years, only three of the 33 people in the stress management group suffered "cardiac events," defined as a fatal or non-fatal heart attack.
The results are SSBL = 2,312, SSTR =3,233, and SSE =12,386. Are all three sweeteners equally effective in reducing weight?
Determine the probability distribution for X defined as number of defective items drawn (Hint: You have to determine P(X=0), P(X=1) and P(X=2).
The Bunte Auto Repair Shop received a shipment of four carburetors. One is known to be defective. If two are selected at random and tested.
The grades have a bell-shaped distribution. Based on this information, which one of the following is the best estimate of the number of students with grades between 55 and 83?
suppose that a random sample of 50 bottles of a particular brand of cough syrup is selected and the alcohol content of
Determine the probability that 5 or less questionnaires will be returned? Compute also probability that 7 or more questionnaires will be returned.
Suppose the psychologist actually observes y‾ = 6.2. Based on your answer to part a, make an inference about the population from which the sample was selected.
Formulate a suitable null and alternative hypothesis to test the students' claim that they followed their instructor's recommendation at a 5% level of significance and interpret your findings.
A coin was flipped 60 times and came up heads 36 times. Determine the critical value you would use to test whether proportion of heads is greater than 0.50 at 10% level of significance?
the mean age at which men in the united states marry for the first time follows the normal distribution with a mean of
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