Question

A random sample of 80 light bulbs manufactured by company Ahad an average life time of 1258 hours with a standard deviationof 94 hours, while a random sample of 60 light bulbsmanufactured by company B had an average lifetime of 1029hours with a standard deviation of 68 hours. Because of the highcost of bulbs from company A, we are inclined to buy fromcompany B unless the bulbs from company will last over 200hours longer on the average than those from company B. Run atest using a=0.01 to determine from whom we should buy ourbulbs​

Answer 1

Answer:

Hello

Step-by-step explanation:

मेरे साथ गेम खेलो सिर्फ 10 मिनट और 3000 रुपये एक दिन में कमाओ .... PLAY GAME WITH ME FOR 10 MINUTES AND EARN 3000 rs. DAILY

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