endermss6220
17.12.2020 •
Mathematics
A sample of 25 light bulbs will be selected to conduct a test to determine if the mean life of the bulb is different than 1000 hours. The sample bulbs had a mean of 994.1 hours and a standard deviation of 30.5 hours. Conduct the test.
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Ответ:
number 7 is D, 3 is C, 4 is A, 1 is B i think, and 2 is A
Step-by-step explanation: