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A manufacturing process produces itmes whose weights are normally distributed. It is known that 22.57% of all the items produced weigh between 100 grams up to the mean and 49.18% weigh from the mean up to 190 grams. Determine the mean and the standard deviation.
What decision should be made regarding the null hypothesis?
The time between arrivals of customers at the drive-up window of a bank follows an exponential probability distribution with a mean of 10 minutes. What is the probability that the arrival time between customers will more than 20 minutes?
Raccoons are identified by gender and then weighed from three different neighborhoods. Using a 0.05 significance level what can you conclude from the following Two-Way ANOVA results?
Then comment on the effectiveness of the presentation: Were the frequency distributions used effectively to report the results? Why or why not?
The residents play both shuffleboard and poker, find the probability that a resident plays poker, given that they garden (that is, find P(poker | garden).
Blood type AB is found in only 3% of the population. If 320 people are chosen at random, find the probability of the following. (Round your answers to four decimal places.)
Assuming that the heights are recorded to the nearest half-centimeter, how many of these students would you expect to have heights.
There is no significant difference in the mean household incomes between the two neighborhoods +0.05
What is a p-value in testing hypothesis? How does this p-value help us to decide to/not to reject a Null hypothesis? What might happen if we do not use this p-value in particular, when we are rejecting a Null hypothesis?
Determine the calculated value of the test statistic? What distribution does test statistic have when null hypothesis is true?
A survey of 100 clients of pacific gas and electric resulted in the following frequency distribution of monthly charges.
Given the following data, calculate the EMV for each investment alternative. Which is best based on the EMVs you calculated?
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