HELP PLEASE!!! I just went to my mother\'s funeral yesterday and my A-hole teacher wouldn\'t cut me a break for my test due today. I cannot think straight and need some serious help. I am going to adjust this to offer 5000 points...ALSO, timed test....so I have two hours....HELP if you can...
Question 1 of 23
Question 2 of 23
A company operates four machines during three shifts each day. From production records, the data in the table below were collected. At the .05 level of significance test to determine if the number of breakdowns is independent of the shift.
Machine
Shift
A
B
C
D
1
41
20
12
16
2
31
11
9
14
3
15
17
16
10
Question 3 of 23
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Question 6 of 23
Question 7 of 23
A researcher hypothesizes that the variation in the amount of money spent on business dinners is greater than the variation of the amount of money spent on lunches. The variance of nine business dinners was $6.12 and the variance of 12 business lunches was $0.87. What is the test value?
Question 8 of 23
Question 9 of 23
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Question 11 of 23
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Question 13 of 23
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Question 15 of 23
Question 16 of 23
Question 17 of 23
The marketing manager of a large supermarket chain would like to determine the effect of shelf space (in feet) on the weekly sales of international food (in hundreds of dollars). A random sample of 12 equal
| Question 1 of 23 | 1.0 Points | The chi-square goodness-of-fit test can be used to test for: | A.normality | | | B.difference between population means | | | C.difference between population variances | | | D.significance of sample statistics | | Reset Selection
| | Question 2 of 23 | 1.0 Points | A company operates four machines during three shifts each day. From production records, the data in the table below were collected. At the .05 level of significance test to determine if the number of breakdowns is independent of the shift. | Machine | | Shift | A | B | C | D | | 1 | 41 | 20 | 12 | 16 | | 2 | 31 | 11 | 9 | 14 | | 3 | 15 | 17 | 16 | 10 | | A.The number of breakdowns is dependent on the shift, because the test value 11.649 is less than the critical value of 12.592. | | | B.The claim that the number of breakdowns is independent of the shift cannot be rejected, because the test value 11.649 is less than the critical value of 12.592. | | | C.The number of breakdowns is dependent on the shift, because the p-value is .07. | | | D.The number of breakdowns is independent of the shift, because the test value 12.592 is greater than the critical value of 11.649. | | Reset Selection
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| Question 3 of 23 | 1.0 Points | A single variable X can explain a large percentage of the variation in some other variable Y when the two variables are: | A.directly related | | | B.mutually exclusive | | | C.inversely related | | | D.highly correlated | | Reset Selection
| | Question 4 of 23 | 1.0 Points | A linear regression analysis produces the equation
y = 5.32 + (-0.846)x
Which of the following statements must be true? | A.As x increases, y increases, and the correlation coefficient must be positive. | | | B.As x increases, y decreases, and the correlation coefficient must be positive. | | | C.As x increases, y increases, and the correlation coefficient must be negative. | | | D.As x increases, y decreases, and the correlation coefficient must be negative. | | Reset Selection
| | Question 5 of 23 | 1.0 Points | Correlation is a summary measure that indicates: | A.the strength of the linear relationship between pairs of variables | | | B.the magnitude of difference between two variables | | | C.a curved relationship among the variables | | | D.the rate of change in Y for a one unit change in X | | Reset Selection
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| Question 6 of 23 | 1.0 Points | Serum ferritin is used in diagnosing iron deficiency. In a study conducted recently researchers discovered that in a sample of 28 elderly men the sample standard deviation of serum ferritin was 52.6 mg/L. For 26 younger men the sample standard deviation was 84.2 mg/L. At the .01 level of significance, do these data support the conclusion that the ferritin distribution in elderly men has a smaller variance than in younger men? | A.Yes, because the test value 0.390 is less than the critical value 2.54 | | | B.Yes, because the test value 2.56 is greater than the critical value 0.394 | | | C.Yes, because the test value 2.56 is greater than the critical value of 2.54 | | | D.No, because the test value 1.60 is less than the critical value of 2.54 | | Reset Selection
| | Question 7 of 23 | 1.0 Points | A researcher hypothesizes that the variation in the amount of money spent on business dinners is greater than the variation of the amount of money spent on lunches. The variance of nine business dinners was $6.12 and the variance of 12 business lunches was $0.87. What is the test value? | A.9.61 | | | B.7.03 | | | C.49.50 | | | D.3.10 | | Reset Selection
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| Question 8 of 23 | 1.0 Points | Suppose that the mean time for a certain car to go from 0 to 60 miles per hour was 7.7 seconds. Suppose that you want to test the claim that the average time to accelerate from 0 to 60 miles per hour is longer than 7.7 seconds. What would you use for the alternative hypothesis? A.H1: ![\"\\f$\\mu](\"//edge.apus.edu/cgi-bin/latex.cgi?%5Cinline%20%5Cmu%20\"/) > 7.7 seconds | | B.H1: ![\"\\f$\\mu](\"//edge.apus.edu/cgi-bin/latex.cgi?%5Cinline%20%5Cmu%20%5Cgeq%20\"/) 7.7 seconds | | | C.H1: < 7.7 seconds | | | D.H1: = 7.7 seconds | | Reset Selection
| | Question 9 of 23 | 1.0 Points | A type I error occurs when the: | A.sample mean differs from the population mean | | | B.null hypothesis is incorrectly rejected when it is true | | | C.test is biased | | | D.null hypothesis is incorrectly accepted when it is false | | Reset Selection
| | Question 10 of 23 | 1.0 Points | The alternative hypothesis is also known as the: | A.optional hypothesis | | | B.null hypothesis | | | C.research hypothesis | | | D.elective hypothesis | | Reset Selection
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| Question 11 of 23 | 1.0 Points | In a study of elephants a researcher wishes to determine the average weight of a certain subspecies of elephants. From previous studies, the standard deviation of the weights of elephants in this subspecies is known to be 1500 pounds. How many elephants does the researcher need to weigh so that he can be 80% confident that the average weight of elephants in his sample is within 350 pounds of the true average weight for this subspecies? Reset Selection
| | Question 12 of 23 | 1.0 Points | The t- distribution for developing a confidence interval for a mean has _____ degrees of freedom. | A.n | | | B.n + 1 | | | C.n - 1 | | | D.n - 2 | | Reset Selection
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| Question 13 of 23 | 1.0 Points | The continuous distribution characterized by a symmetric, bell-shaped curve is the: | A.normal distribution | | | B.binomial distribution | | | C.Poisson distribution | | | D.exponential distribution | | Reset Selection
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| Question 14 of 23 | 1.0 Points | Find the variance of the following probability distribution.
| X | P(X) | | 1 | 0.20 | | 2 | 0.35 | | 3 | 0.10 | | 4 | 0.25 | | 5 | 0.10 | | A.1.83 | | | B.1.31 | | | C.1.25 | | | D.1.71 | | Reset Selection
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| Question 15 of 23 | 1.0 Points | If A and B are any two events with P(A) = .8 and P(B|A) = .4, then the joint probability of A and B is | A.0.80 | | | B.0.40 | | | C.1.20 | | | D.0.32 | | Reset Selection
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| Question 16 of 23 | 3.0 Points | Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), \"E\" or \"e\" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where \"a\" and \"b\" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
A sport preference poll yielded the following data for men and women. Use a 5% significance level and test to determine if sport preference and gender are independent.
Sport Preferences of Men and Women | Basketball | Football | Soccer | | | Men | 20 | 25 | 30 | 75 | | Women | 18 | 12 | 15 | 45 | | 38 | 37 | 45 | 120 |
What is the test value for this hypothesis test?
Answer: Round your answer to two decimal places.
What is the critical value for this hypothesis test?
Answer: Round your answer to two decimal places.
What is the conclusion for this hypothesis test? Choose one.
1. There is sufficient evidence to support the claim that one\'s sport preference is dependent on one\'s gender.
2. There is not sufficient evidence to support the claim that one\'s sport preference is dependent on one\'s gender.
Answer: Enter only a 1 or 2 for your answer.
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| Question 17 of 23 | 1.0 Points | Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), \"E\" or \"e\" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where \"a\" and \"b\" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
The marketing manager of a large supermarket chain would like to determine the effect of shelf space (in feet) on the weekly sales of international food (in hundreds of dollars). A random sample of 12 equal | |
ccepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), \"E\" or \"e\" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where \"a\" and \"b\" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
The marketing manager of a large supermarket chain would like to determine the effect of shelf space (in feet) on the weekly sales of international food (in hundreds of dollars). A random sample of 12 equal
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