A chi-square goodness-of-fit-test is to be performed to see if data fit the Poisson distribution. There are 8 categories, and the parameter must be estimated. How many degrees of freedom should be used?
A) 8
B) 7
C) 6
D) 5
Q. 2Use Excel or Minitab to conduct a two-sample t-test.
What will be an ideal response?
Q. 3The probability that a random variable lies between a pair of values is the area under the probability density function to the left of the two values.
Indicate whether the statement is true or false
Q. 4The sum of Poisson random variables is also a Poisson random variable.
Indicate whether the statement is true or false
Q. 5What conclusions can you draw about the relationship between age and net wealth?
What will be an ideal response?
Q. 6A chi-square test of a contingency table with 4 rows and 5 columns shows that the value of the test statistic is 22.18. The most accurate statement that can be made about the p-value for this test is that the p-value is:
A) greater than 0.05 but smaller than 0.10.
B) smaller than 0.025.
C) greater than 0.025 but smaller than 0.05.
D) greater than 0.10.
Q. 7The posterior probability of any event must be at least as large as its prior probability.
Indicate whether the statement is true or false
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