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An unknown distribution has a mean of 90 and a standard deviation of 15. A sample size of 80 is drawn randomly from the population. Find the probability that the sum of the 80 values (or the total of the 80 values) is more than 7400.
These expenses were incurred in selling for products during January 2016. Where would suggest she put these expenses?
If the probability is 0.75 that a person will believe a rumor about the transgressions of a certain politician, find the probabilities that (a) the eighth person to hear the rumor will be the fifth to believe it;
State the null and alternative hypotheses for the ANOVA (include definitions of parameters). What assumptions do we need to proceed with ANOVA?
At the .01 significance level, is there a difference in the mean number of times men and women order take-out dinners in a month? What is the p-value?
The diameters of peaches in a certain orchard are normally distributed with a mean of 5.10 inches and a standard deviation of 0.40 inches.
(1) Use Laplace Transforms to solve Differential Equation y'' - 8y' + 20 y = t (e^t) , given that y(0) = 0 , y'(0) = 0
an investigator measuring various characteristics of a large group of athletes found that the correlation between the
How does the shape of the quantile plot affect your interpretation of the results?
what is the formula of t-quantile distribution needed to calculate an exact 90 confidence interval for the
What type of method was used in this study?- Can you conclude that people become more politically conservative as they get older? Why or why not?
What is the level of measurement of the variable presented in this table?
you randomly select 20 supermarkets and measure the temperature of their coolers. the sample mean temperature is 43.0f
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