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1. What are the uses of the multivariate normal distribution? Why is it needed?
2. How many discriminant functions may be found signi?cant in classifying an observation into one of four groups?
3. Is it possible that only one discriminant function will be found signi?cant in discriminating among three groups? Explain.
4. What is a hit ratio? Will a hit ratio of 67% be sufficient when one group has 100 observations, another group has 200 observations, and the ratio of these groups is believed to re?ect their ratio in the population? Explain.
5. What is achieved by principal-components analysis? How can it be used as a preliminary stage in factor analysis? What important stages must follow it, and why?
6. In a factor analysis of 17 variables, a solution is found consisting of 17 factors. Comment on the analysis.
a manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells cycles them a specified
rolling a fair eight sided dice produces a uniformly distributed set of numbers between 1and 8 with a mean of 4.5 and a
Find out the value of correlation coefficient. Make a regression model to predict winning percentage utilizing all of the data.
Use the IBM APA software to calculate the appropriate descriptive statistics for the variables in your assigned data
a 6-faced die is rolled two times. let a be the event that the outcome of the first roll is greater than 4. let b be
Management is interested in determining whether their efficiency measures have actually reduced prices. Answer the following questions for a hypothesis test that could be used to test the claim of management.
Certain stocks are recommended each month by a monthly magazine. If 40% of the stocks recommended advance at least 20%, what is the probability that of the five stocks most recently recommended
If this poll had been based instead on 5000 adults, do you think the "95% confidence interval" would be wider or narrower than the interval given?
State the hypotheses. State the decision rule & sketch it. Find the sample proportions & z test statistic.
according to an almanac 60 of adult smokers started smoking before turning 18 years olda compute the mean and standard
The hypotheses are as follows: Null Hypothesis: μD ≤ 0, Alternative Hypothesis: μD > 0. From her data, the resesarcher calculates a p-value of 0.0162. What is the appropriate conclusion? The difference was calucated as (after - before).
Store used ANOVA to test if mean sales for each credit card were equal. What are the degrees of freedom for F statistic?
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