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Question: There is some evidence that REM sleep, associated with dreaming, may also play a role in learning and memory processing. For example, Smith and Lapp (1991) found increased REM activity for college students during exam periods. Suppose that REM activity for a sample of n = 16 students during the final exam period produced an average score of M = 143. Regular REM activity for the college population averages µ = 110 with a standard deviation of 0 = 50. The population distribution is approximately normal. A.) Do the data from this sample provide evidence for a significant increase in REM activity during exams? Use a one-tailed test with _ = .01. B.) Compute Cohen's d to estimate the size of the effect. .
In Excel, which of the following functions is used to conduct a hypothesis test (using the p -value) for a population variance
The average number of putts per hole for each player and their average driving distance is used to predict their total winnings using the multiple regression model where the deviations εI are assumed to be independent and Normally distributed with..
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
What is the probability the Time/CNN poll will provide a sample proportion within plus-or-minus 0.02 of the population proportion?
A partial computer output from a regression analysis as follows. The regression equation is:
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
In standard normal distribution standard deviation is always ___.
Determine marginal probability distributions of X and Y . Compute conditional probability P ( Y = 2 | X = 1)
Compute the range and interquartile range
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
If a null hypothesis is rejected at a significance level of .01, it will ______ be rejected at a significance level of .05
Data on distribution of cost for building effort, design work and testing effort.
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