CONFIDENTIAL BPA 12303 Q1 Two types of drugs were used on 5 and 7 patients for reducing their weights in Jerry's 'slim-b

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Confidential Bpa 12303 Q1 Two Types Of Drugs Were Used On 5 And 7 Patients For Reducing Their Weights In Jerry S Slim B 1 (56.38 KiB) Viewed 38 times

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CONFIDENTIAL BPA 12303 Q1 Two types of drugs were used on 5 and 7 patients for reducing their weights in Jerry's 'slim-beauty' health club. Drug A was allopathic and drug B was herbal. The decrease in the weight after using drugs for six months given as follows. Table Q1: Jerry's slim-beauty helath club data 12 14 9 15 Q2 Drug A 10 Drug B 8 13 12 11 14 10 (c) 9 Test the hypothesis if there are significant differences in drug B and drug A by using a 0.001 significance level. Assume that the variances of the population are unknown but equal (25 marks) (a) A consultant noted the time taken by 40 counter servers to complete a standard order is with averaged 78.4 seconds and standard deviation of 13.2 seconds to complete the order. Construct 95% confidence interval for the true average time required to complete the standard order. (10 marks) (b) A study conducted by an airline showed that a random sample of 120 of its passengers disembarking at Kennedy Airport on flights from Europe took on the average 24.15 minutes with standard deviation of 3.29 minutes to claim their luggage and get through customs. What can they assert with 95% confidence about the maximum error, if they use * = 24.15 minutes as an estimate of the true average time it takes one of their passengers disembarking at Kennedy airport on flights from Europe to claim his or her luggage and get through customs. (8 marks) Before purchasing a large shipment of ground meat, a sausage manufacturer wants to be 95 percent confident that he is in error no more than 2.5 grams in estimating the fat content (per 100 grams of meat). Determine the sample size if the standard deviation of the fat content (per 100 grams of meat) is assumed to be 8 grams (7 marks)
CONFIDENTIAL Q3 Two rounds of Mobile Legend competition were held and to determine the winner. The following are the scores obtained on the first round and second round in Mobile Legend competition by 12 players. Table Q3: Scores of 12 players in two rounds Players First round Second round. 1 71 83 2 49 62 3 80 76 4 73 77 5 93 89 85 74 58 48 82 78 64 76 32 51 87 73 80 89 (a) (b) (c) (d) (e) (f) BPA 12303 6 7 8 9 10 11 12 Sketch a scatter plot for the data in Table Q3. Find the estimated regression line by using the least square method. Interpret the result in Q3(b). (5 marks) (2 marks) Estimate the score of player who score 84 in the first round of competition. (2 marks) Interpret these results in Q3(e). (7 marks) Compute the coefficient of correlation, and coefficient of determination, 7² (7 marks) 3 (2 marks) CONFIDENTIAL
CONFIDENTIAL Q4 (a) (b) BPA 12303 The amount of sodium (in milligrams) in one serving for a random sample of three different kinds of foods is listed in Table Q4(a) below. Determine if there is a sufficient evidence to conclude that a difference in mean sodium amounts exists among condiments, cereals, and desserts at the 0.05 level of significane. (i) (ii) (iii) (iv) Consider the following Table Q4(b). (v) 3 Table Q4(a): Sodium Contents of Foods Condiments Cereals 270 130 230 180 80 70 200 Source Table Q4(b): Partially Completed ANOVA Table Sum of Squares B Treatment Error Degree of freedom 2 260 220 A 13 290 290 200 320 140 71.833 172.929 Mean Squares C D - END OF QUESTIONS - Desserts 140 180 250 250 300 360 300 160 (15 marks) F Statistics E Complete the ANOVA Table Q4(b). Determine the number of treatments are being compared in this experiment. Find the total number of observations obtained in this experiment? Carry out the hypothesis testing to determine the differences between the treatment means at the 0.05 level of significance. Describe the conclusion in Q4(b)(iv). (10 marks)