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A researcher predicts that listening to music while solving math problems will make a particular brain area more active, to test this, a research participant has her brain area scanned while listening to music and solving math problems, and the brain area of interest has a percent signal change of 58. From many previous studies with this same math- problems procedure (but not listening to music), it is known that the signal change in this brain area is normally distributed with a mean of 35 and a standard deviation of 10. Using the .01 level what should the researcher. Conclude? Solve this problem explicitly using all five steps of hypothesis testing and illustrate your answer with a sketch (or cutoffs), and the score of the sample on this distributing. Then explain your answer to someone who has never had course in statistics (but who is familiar with mean, standard deviation, and Z scores.)
Evaluate the performance of this decision.
Determine the range and standard deviation of the times.
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
If we fit the least-squares line to the 12 data points (one for each month) we obtain the following results from a software package. Notice that temperature is taken as the explanatory variable and crawling age as the response.
What statistical procedure was used to analyze data in study B?
Karefree State University has an enrollment of 18,000. Researchers took a sample of 900 and found 477 students wanted a Field Hockey team. Construct the 95% and 99% Interval estimates for the population proportion.
Explain the terms parameter and statistics. Make sure the concepts of population and sample are included in the definitions.
What is the probability of finding 1 or more children with chronic bronchitis in a population where the incidence rate of chronic bronchitis is 10% (like the one above?)
Using the following data on 15 workers, construct an exact 95% confidence interval for µ.
What IQ score should one have in order to be eligible for Mensa?
Write the null and alternative hypotheses you would use to test the following situation.
Compute the range and interquartile range
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