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Calculate the effect size for an independent-samples t test, based on the following information:
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The P-value for a two-sided test of the null hypothesis H0: μ = 50 is 0.035. Does the 95% confidence interval include the value 50? Why? Does the 99% confidence interval include the value 50? Why?
Suppose the chance of selecting a female adult at random in the population is exactly π= 0.5 (ie: 50%). What is the probability that I choose 10 adults at random and I get the number of females in the sample to be betwee ...
Use the standard normal distribution or the? t-distribution to construct a 90?% confidence interval for the population mean. Justify your decision. If neither distribution can be? used. In a recent? season, the populatio ...
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Assume that the coin is weighted so that a tail is 6 times as likely as a head. The coin is flipped 9 times. 1) What is the probability that both heads and tails occur?
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