A consumer group was interested in comparing the operating time of cordless toot

Question

A consumer group was interested in comparing the operating time of cordless toothbrushes manufactured by two different companies. Croup members took a random sample of 18 toothbrushes from Company A and 15 from Company B. Each was charged overnight and the number of hours of use before needing to be recharged was recorded. Company A toothbrushes operated for an average of 119.7 hours with a standard deviation of 1.74 hours, Company B toothbrushes operated for an average of 120.8 hours with a standard deviation of 1.72 hours. Since the two samples are independent, the t-test for two moans appropriate in this situation. True False

Explanation / Answer

TRUE

Reason : Here the two sample are independent . So , a two sample t-test for two means can be conducted in this situation .

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