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Imagine that the following sentence is from a Results section. Identify what is wrong with it. "There was a significant effect of gender at the .01 level, with a t-score of 10.2 for 9 degrees of freedom."
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
Organise the data in appropriate class intervals and draw a histogram of the frequency distribution and find the Mean, Median, Range, Standard Deviation and Coefficient of Variation of the yield for the top 40 Australian companies.
The time (in hours) until failure of a transistor is a random variable X which is exponentially distributed with mean = 50. It is observed that after 40 hours the transistor is still working. Find the conditional probability that X > 65.
State the relevant null and alternative hypotheses and calculate the appropriate test statistic. (By hand or using JMP.)
What are the expected value and variance of the following probability distribution?
Identify the point estimate of the average number of available hotel rooms in this lesson from each sample. Construct and Interpret a 95% confidence level for the true mean number of available hotel rooms, based on the point estimate of each sampl..
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities.
The weights of dormitory cockroaches follow a normal distribution. 14% of the dormitory cockroaches weigh below 77 grams and 10% of them weigh above 82 grams. Find the mean and standard deviation of their weights.
Among 620 adults selected randomly from among the residents of one town, 18.9% said that they favor stronger gun-control laws.
a researcher testing the effects of two treatments for anxiety computed a 95 confidence interval for the difference
the cost of a one-carat vs2 clarity h color diamond from diamond source use is 5600. a midwestern jeweler makes calls
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