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The regression equation between years of employment (X) and discount amount (Y) % at the Happy cafeteria is given by:
Y =3*X + 9
For how many years you need to be an employee in order to get a 25% discount.
Which is the correct answer
1. 9
2. more than 5.3
3. 12
4. more than 3
Roll a balanced 8-sided dice and a balanced 6 sided die and add the spots on the up-faces. Call the sum X. What is the probability distribution of the random variable X.
What measure would you use and why? Make sure to provide enough detail about the situations so that others can understand your responses. Work as a correctional officer.
Tthe true population mean when different samples of the same size are taken. Note that the variability of the sample mean is LESS than that of individual observations Does this makes sense?
Find the probability that the average diameter of those sand dollars is more than 4.13 centimeters. Assume that the variable is normally distributed.
Suppose that population variances from both conditions are equal is there evidence that treatment decreases surface hardness of steel plates?
Regression and Correlation are two of the most often used and abused tools in research. People are quick to jump to conclusions that if a relationship exists between two variables, then one must cause (causation) the other.
Give your answer to the nearest integer.
a study was commissioned to investigate the characteristics of properties that are for sale. data was collected on 60
A researcher is testing the effect of a new cold and flu medication on reaction time. A sample of n = 9 students is obtained and each student is given the normal dose of the medicine.
A study of 36 members of the Central Park Walkers showed that they could walk at an average rate of 2.6 miles per hour. The sample standard deviation is 0.4. Find the 95% confidence interval for the mean for all walkers.
If a survey of 109 randomly selected united states residents is to be taken, what is the approximate probability that at least 60 will be under 31 years of age?
For a sample with n=36, the mean duration of a geyser is 3.55 minutes and the standard deviation is 0.63 mintues. Using chebychev's theory, determine at how many of the eruptions lasted between 2.29 and 4.81 mintues.
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