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A U.S. based internet company offers an on-line proficiency course in basic accounting. Completion of this online course satisfies the "Fundamentals of Accounting" course requirement in many MBA programs. In the first semester 315 students have enrolled in the course. The marketing research manager divided the country into seven regions of approximately equal populations. The course enrollment values in each of the seven regions are given below. The management wants to now if there is equal interest in the course across all regions.
Region
Enrollment
1
45
2
60
3
30
4
40
5
50
6
55
7
35
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
To test the difference between two means using two mean z test.
Determine the 95% confidence interval for your estimate what data have you utilized as the basis of your predictions what suppositions have you made.
The management of a department store is interested in estimating the difference between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card.
The ________ is the probability of observing a sample value as extreme as, or more extreme than the value observed, given that the null hypothesis is true.
Develop a linear regression equation for the given data and forecast how much money Robert will win if he spends $30.
Test the hypothesis. Will you reject or not reject the null hypothesis at α = 0.05
Carry out suitable multiple comparison procedure to determine the source of the difference.
A researcher was interested in determining whether incentives affect the response rate in surveys. A simple random sample of 50 adult residents of a large city was selected. All were mailed a survey and promised a check upon returning a completed ..
The mean amount purchased by a typical customer at Churchill\'s Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the foll..
There were 25 subjects included in each of the combinations of gender and smoking status. One of the variables measured was the heart rate after six minutes of exercise. A two-way ANOVA is performed with the resulting ANOVA table given below
Thirty-two samples of 8 items each were collected from a process. The average sample mean is 12 and the average range is 0.10. The upper and lower control limits, respectively, for an:
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