Q12. The maker of Surya bulbs wants to demonstrate that their bulbs last on an average of at least 100 hours longer than Ortan bulbs. Two independent random samples of 100 bulbs of each kind are selected. The sample average lives for Surya bulbs found to be 1550 hours and for Ortan bulbs is 2020 hours. Assume that the standard deviation s1 is 75 and the standard deviation s2 is 60 respectively. Find the test Statistic F to test this claim (Round off up to 3 decimal places) a. 1.306 b. 1.562 c. 0.932 d. 0.653

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Q12. The maker of Surya bulbs wants to demonstrate that their bulbs last on an average of at
least 100 hours longer than Ortan bulbs. Two independent random samples of 100 bulbs of each
kind are selected. The sample average lives for Surya bulbs found to be 1550 hours and for Ortan
bulbs is 2020 hours. Assume that the standard deviation s1 is 75 and the standard deviation s2 is
60 respectively. Find the test Statistic F to test this claim (Round off up to 3 decimal places)
a. 1.306
b. 1.562
c. 0.932
d. 0.653

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