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In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the proportions have changed, a sample of 300 students was taken. Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College.
The conclusion of the test is that the:
A. proportions have changed significantly
B. proportions have not changed significantly
C. test is inconclusive
D. None of these alternatives is correct.
Any analysis required to check the required conditions (note that if you find that you cannot meet the required conditions for the test you expected to do, you must use the appropriate non-parametric test)
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
The main goal of correlation research is ______________
Otherwise you lose $1. If you make this wager very many times, what will be the mean outcome?
At 0.05 level of significance, is there evidence that proportion of claims processed under this new system is higher than article reported for previous system?
Use the method of least squares to model the relationship between x and y.
A company makes camshafts. The camshaft lengths need to be within a certain tolerance or they will not fit. They have produced x bar and s charts
The standard deviation of the differences d for the paired sample data s d = ____________
Below you are given a partial computer output based on a sample of 16 observations.
If 1 man aged 18-24 is arbitrarily chosen, determine the probability that his serum cholesterol level is between 165 and 200.
Given the following data on hotel check-ins for a 6-month period:
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