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A sample data set has n=50 observations. The mean of the data is x=46.5. the sum of squares is x^2=127793. What is the standard deviation of the data.
(a) Use Excel to develop a time series model that Hillstone can use to prepare seasonally adjusted trend forecasts of passenger vehicle tyre sales on a quarterly basis. (b) Prepare seasonally adjusted trend forecast estimates for 2012 and 2013 on a..
Most businesses use some form of linear regression in forecasting future conditions. Give an example of the use of regression analysis at your organization. What were the independent and dependent variables?
If the same sample results had been obtained from a random sample of 16 students, could the students' claim be accepted at a lower level of significance?
A manufacturer claims that he makes light bulbs each of which has a 0.9 probability of operating successfully when plugged in.
Set up hypotheses to test if distribution of birthdays can be considered coming from uniform distribution.
Suppose that distinct integer values are written on each of 3 cards. These cards are then randomly given the designations A, B, and C. The values on cards A and B are then compared. If the smaller of these values is then compared with the value on..
a certain species of tree has an average life span of 130 ears. a researcher has notice a large number of trees of this
in nancys stat 225 class 75 of the students passed got a c or better on exam 1. suppose we randomly choose 10 students
As a bonus, students are encouraged to research new and interesting articles/ websites/ interactive tools, etc. which are pertinent to the class material.
4. Why is a 99% confidence interval wider than a 95% confidence interval?
Suppose 18 custopmers are selected at random. What is the proability that exactecly ten customers will ask for hot peppers?
question there are three cards in a box. both sides of one card are black both sides of one card are red and the third
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