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The following data were collected on two variables X and Y.
X 1 2 4 6 10 12Y 20 15 12 10 5 1
a) Specify the null and alternate hypotheses for testing that the population correlation is negative.
b) Calculate the estimate of the population correlation coefficient between X and Y.
c) Calculate the coefficient of determination.
d) Using a 5% significance level, test the hypothesis in part a).
The number of bombardment necessary to achieve the disintegration of a certain nucleus is assumed to have the distribution above. In one sequence in which b bombardments are available, of these have already failed to disintegrate the nucleus. What..
At 5% level of significance, is there evidence of difference in mean life of bulbs made by the 2 kinds of machines. What is your conclusion?
A salesperson makes four calls per day. A sample of 100 days gives the following frequencies of sales volumes.
In terms of p , the researcher should test which of the following null and alternative hypotheses?
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
Perform the trend analysis of Pf with incrementally increasing number of the simulation cycles, and calculate the statistical uncertainty in the estimate expressed as the coefficient of variation.
We can think of this as the value of mew that maximizes f(y), the probability that our observed value of y occurs.
Assume that the distribution of heights of adults American normally distributed, with mean 69 inches and standard deviation 2.8 inches.
They found that those with higher levels of cigarette use had lower GPAs, and vice versa. What can you rightfully conclude from this? Why? Be specific about what this kind of information may indicate and mean.
Sample of size 26 was taken from normal population with standard deviation 1.697. Approximate the probability that standard deviation of sample is greater than 1.23.
A probability value of .25 means that an event will occur:
The profit for product 1 is $6 per unit, and the profit for product 2 is $4 per unit. Solve this model by using graphical analysis.
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