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Data on the number of occurrences per time period and observed frequencies follow. Compute the value of the test statistic. Use ?=0.05.
Number of Occurrences
Observed Frequency
0
39
1
30
2
3
18
4
Explore the descriptive statistics and draw some scatter plots. Does this meet the basic assumptions of regression?
why is a z-score range -3 to 3? if a normal distribution is not assumed can a z-score still be used? why or why
Assume that 5,000 sales invoices are separated into four strata. Stratum 1 contains 50 invoices, stratum 2 contains 500 invoices, stratum 3 contains 1,000 invoices, and stratum 4 contains 3,450 invoices.
ANOVA is a powerful statistical test. How does ANOVA differ from other parametric tests? What are the conditions that must be met to use a one-way ANOVA?
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A person is planning on saving money according to a rigid savings schedule. Saving plan A is to make an initial deposit of $400 and then deposit $20 per month into the account.
Suppose a fast food restaurant wishes to estimate average sales volume for a new menu item. The restaurant has analyzed the sales of the item at a similar outlet and observed the following results:
What is the purpose of sampling? What are some concerns and dangers of sampling? How important is the sample design to data validity? Explain.
I want to see two methods are the significantly same or not. Each methods has 5 variables are inside. so I would like to see each 5 variables from methods A and B are significantly the same and overall the two methods are significantly same or not..
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