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Children toilet train (training age normally distributed) at an average of 26 months with a standard deviation of 2 months.
a. how lilely is child to be trained after 30 months?b. What age defines the first 10% of kids to toilet train?c. What ages define the middle 80% of kids toilet training?
Find the density for Z = X + Y. Verify that it integrates to 1. Find the median (the value of z for which P(Z =
Rita rows 12 km upstream and 12 km downstream in 3 hours. The speed of her boat in still water is 9 km/hr. Find the speed of the stream.
what is the probability that at least 8 of the words on the test are words that the student knows?
For a hypothesis comparing two population means, what is the critical value for a one-tailed hypothesis test, using a 5% level of significance level, with both sample sizes equal to 13? Assume the population standard deviations are equal.
Find out the earliest completion time for play and critical path.
What do we use the F Distribution to test? Provide an example from your place of employment or circle of influence of an instance when you could use the F Distribution.
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best? Which machine is the worst?
Test hypothesis that intake of linoleic acid in this group is lower than that of general population. Also, calculate p-value for hypothesis test.
The times for 300 college students of introductory statistics to complete a one-hour times exam.
Describe ways in which the use of MS Excel as a tool for interpreting data can be used by a manager of an organization.
An experiment is designed to test the potency of a drug on 20 rats. Previous animal studies have shown that 10-mg dose of the drug is lethal 5% of the time within the first 4 hours; of the animals alive at 4 hours, 10% will die in the next 4 hours..
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
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