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- *** TO BE DONE WITH THE USE OF EXCEL*** ***FOR MATCHED PAIR DO: BEFORE - AFTER*** ***FOR INDEPENDENT SAMPLES DO: BEFORE AS SAMPLE 1 AND AFTER AS SAMPLE 2*** A company implemented a new sales management software program, hoping it will reduce the amount of time sales people spend on their computers. A sample of sales personnel computer usage before and after the new software implementation is provided below (also available for download here Computer.xlsx). At a 1% level of significance, can you conclude that the new software has made a difference in the amount of time sales people spend on their computers? YOU CAN ASSUME THE POPULATION TO BE NORMALLY DISTRIBUTED. Time Spent on Computer Employee ID Before New Software (hrs/wk) After New Software (hrs/wk) 49193 9 8 62328 9.5 9.5 97193 6 5.5 77414 3.5 3 61760 5 5 41200 4.5 5 12406 11 10.5 70657 6.5 6 86801 2.5 2 32474 10 9 49578 6.5 6 44233 11 10.5 24132 2 1.5 47118 6.5 7.5 82881 4 3.5 69800 4 4…How does qualification of one tail test is done?Sample space ={1, 2, 3, 4, 5, 6} P(1)=P(2)=P(3)=P(4)=1/6, p(5) = 3/12, p(6) = 1/12 Let A={1,2,3,4} Let B ={3,4,6} Determine P(B)
- The degrees of freedom for chi square test of a contingency table with 7 rows and 4 columns.5) from the given problem about the Male & female Occupations, What is degree of freedom? * A 6 B 4 C 5 6) from the given problem about the Male & female Occupations, What is Test Statistics? * A Chi-square Test (Test of Goodness of Fit) B Chi-square Test (Test of Independence) C Ch-square Test (Test of (Homogeneity) 7) from the given problem about the Male & female Occupations, What is Computed Value of X2? * A 17.70 B 16.53 C 15.26 8) from the given problem about the Male & female Occupations, What is the Tabular Value? * A 11.07050 B 12.59160 C 9.49773What are fundamental differences between t test, z test and F test?
- Diagnostic tests of medical conditions can have several types of results. The test result can be positive or negative, whether or not a patient has the condition. A positive test (+) indicates that the patient has the condition. A negative test (−) indicates that the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 200 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for a condition are shown. Condition Present Condition Absent Row Total Test Result + 106 24 130 Test Result − 19 51 70 Column Total 125 75 200 Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities. (Enter your answers as fractions.) (a) P(+ | condition present); this is known as the sensitivity of a test. (b) P(− | condition present);…Diagnostic tests of medical conditions have several results. The rest result can be positive or negative. A positive test (+) indicates the patient has the condition. A negative test (–) indicates the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 137 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for the condition are shown. Condition Present Condition Absent Row Total Test Result + 119 18 137 Test Result – 18 46 64 Column Total 137 64 201 Assume that the sample is representative of the entire population. For a person selected at random, find P(getting test result – or condition present). Round your answer to the nearest hundredth.Diagnostic tests of medical conditions can have several types of results. The test result can be positive or negative, whether or not a patient has the condition. A positive test (+) indicates that the patient has the condition. A negative test (−) indicates that the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 200 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for a condition are shown. Condition Present Condition Absent Row Total Test Result + 108 22 130 Test Result − 21 49 70 Column Total 129 71 200 Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities. (Enter your answers as fractions.) (a) P(+ | condition present); this is known as the sensitivity of a test. Your answer must be a fraction,…
- Rank correlation co-efficient : The marks secured by 10 student of B.Com. in two subjects Economic and Statistics are given below, the two numbers within brackets denoting the ranks of the same students in Economics and Statistics respectively. Use spearmains formula to find the rank correlation co-efficient. (1, 8) (2, 7) (3, 5) (4, 9) (5, 10) (6, 4) (7, 3) (8, 2) (9, 1) (10, 6).Diagnostic tests of medical conditions can have several types of results. The test result can be positive or negative, whether or not a patient has the condition. A positive test (+) indicates that the patient has the condition. A negative test (−) indicates that the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 200 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for a condition are shown. Condition Present Condition Absent Row Total Test Result + 110 20 130 Test Result − 21 49 70 Column Total 131 69 200 Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities. (Enter your answers as fractions.) (a) P(+ | condition present); this is known as the sensitivity of a test. (b) P(− | condition present);…Diagnostic tests of medical conditions can have several types of results. The test result can be positive or negative, whether or not a patient has the condition. A positive test (+) indicates that the patient has the condition. A negative test (−) indicates that the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 200 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for a condition are shown. Condition Present Condition Absent Row Total Test Result + 106 24 130 Test Result − 23 47 70 Column Total 129 71 200 Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities. (Enter your answers as fractions.) (a) P(+ | condition present); this is known as the sensitivity of a test.(b) P(− | condition present); this is…