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Question 1: The Citizens Banking Company is studying the number of times the ATM located in a Loblaws Supermarket at the foot of Market Street is used per day. Following are the numbers of times the machine was used over each of the last 30 days. Determine the mean number of times the machine was used per day.
83
64
84
76
54
75
59
70
61
63
80
73
68
52
65
90
77
95
36
78
47
87
60
Question 2: The American Automobile Association checks the prices of gasoline before many holiday weekends. Listed below are the self-service prices for a sample of 15 retail outlets during the May 2003 Memorial Day weekend in the Detroit, Michigan, area.
1.44
1.42
1.35
1.39
1.49
1.41
1.46
1.45
1.48
1. What is the arithmetic mean selling price?
2. What is the median selling price?
3. What is the modal selling price?
Create a 95% confidence interval for population proportion of positive drug tests.
When the level of confidence and sample standard deviation remain the same, a confidence interval for a population mean based on a sample of n = 100
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At the 0.05 significance level, can he conclude that number of absences has declined? calculate approximately the p -value.
At 0.05 level of significance, is there evidence of significant relationship between age group and where people mainly get their news? If so, describe the relationship.
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If the voice identifications were made by random guess, find the probability that all 9 victims would select the same person?
The probability of the patient being chosen at random as having meningitis as only site of infection is?
Find out a plausible value r for correlation between vehicle weight and miles per gallon (mpg) shown in the scattergram below?
State the appropriate set of hypothesis to test whether there is a relationship between the variables X and Y.
In optimal solution, determinethe critical path?
Categorize the events as dependent or independent. Events A and B where P (A) = 0.7, P (B) = 0.8, and P (A and B) = 0.56.
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