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You have been asked to evaluate the effects of a new educational video that was developed to reduce racial prejudice among adolescents. You plan to administer a pretest measure of racial attitudes to 60 adolescent participants, then randomly assign these participants to watch either the anti-prejudice video, an educational video about volcanoes, or no video.
Afterwards, the participants will complete the measure of racial attitudes a second time.
However, you are concerned that the first administration of the attitudes measure may create pretest sensitization, thereby directly affecting participants attitudes. Explain how you could redesign the experiment to see whether pretest sensitization occurred.
(Hint: You will probably use a 3 x 2 factorial design.) What pattern of results would suggest that pretest sensitization had occurred?
Suppose a single pineapple is selected at random from last years crop. What is the approximate probability that it weighs more than 35 ounces show work.
A random sample of 8 recent batches produced the following yields. Conduct a hypothesis test to determine whether the true mean yield has decreased.
You are interested in whether men participate more than women in political activities, so you survey 632 men and 675 women and ask them how many political events they attended within the past year. Here are your results.
When compared with the uncompensated system (that is, Gc(s) = 1), the compensated system utilizing the lag compensator: Increases the phase lag near the cross-over frequency.
In a surgey of 280 adults over 50.80%; said they were taking vitamin supplements. Find the margin of error for this survey if we want a 99% confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
Determine the appropriate descriptive statistics. For normally distributed data use the mean and standard deviation. For significantly skewed data use the median and interquartile range.
question you notice at the gym that it appears more women tend to work out together whereas more men tend to work out
the mean annual salary of public classroom teachers is 49000. assume the standard deviation is 9200. do the following
Compare and contrast quantitative and qualitative research designs. Identify and discuss some advantages and disadvantages for each type of research.
What sample size would be required to obtain the error of ±10 square millimeters with 99 percent confidence?
True mean number of years to retirement of its employees to within one month of the true mean and with 90% confidence if the range of the data is 7 years?
The State Department of education requires local school districts to keep records on all students within their district. Determine if the following items are categorical or numeric variables.
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