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In the past, of all the students enrolled in "Basic Business Statistics" 10% earned A's 20% earned B's, 30% earned C's, 20% earned D's and the rest either failed or withdrew from the course. Dr Johnson is a new professor teaching "Basic Business Statistics" for the first time this semester. At the conclusion of the semester, in Dr. Johnson's class of 60 students, there were 10 A's, 20 B's, 20 C's, 5 D's and 5 W's or F's. Assume that Dr. Johnson's class constitutes a random sample. Dr Johnson wants to know if there is sufficient evidence to conclude that the grade distribution of his class is different than the historical grade distribution. Use a =.05 and .01 and perform a goodness of fit test.
What can one conclude about the librarian's hypothesis at a level of significance of .05?
Find the test statistic value for two mean tests using equal variance formula.
Determine the 95% confidence interval for the population mean, based on the sample mean.
what is the required sample size is the error is to be less than 1/2 hour with a 95% level of confidence?
I tossed a coin 6 times and recorded the outcomes - H for heads and T for tails. The first set of tosses yielded HTHTTH and the second set of tosses yielded TTTHHH. Which set of tosses is more probable to happen? And why?
The assembly time for a product is uniformly distributed between 6 to 10 minutes. The probability of assembling the product between 7 to 9 minutes is
If random samples of size of 75 is selected, the standard error of the proportions of student in the sample, who are minority students is
What is the probability that the sample mean would differ from the true mean by greater than .04 dollars if a sample of 183 5 gallon pails is randomly selected? Round answer to 4 decimal places.
Find out the mean, median and mode for the given data
Is it reasonable to compute that the mean of the population is actually $15,000.
Discuss an example from every day life, your professional experience, personal life or sports where two variables are positively correlated and why; discuss a second example where two variables are negatively correlated and why.
Describe the meaning of alternatives, criteria and states of nature. How are they utilized in decision analysis?
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