b) The mean life span of population of light bulbs manufactured by Oman electric company is found to be 2400 hours. A sa

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b) The mean life span of population of light bulbs manufactured by Oman electric company is found to be 2400 hours. A sa

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B The Mean Life Span Of Population Of Light Bulbs Manufactured By Oman Electric Company Is Found To Be 2400 Hours A Sa 1
B The Mean Life Span Of Population Of Light Bulbs Manufactured By Oman Electric Company Is Found To Be 2400 Hours A Sa 1 (17.15 KiB) Viewed 125 times
b) The mean life span of population of light bulbs manufactured by Oman electric company is found to be 2400 hours. A sample of 30 light bulbs produced in a lot is found to have a mean life span of 2300 hours with a standard deviation of 250 hours. Test whether the difference between the population and sample means is statistically significant. Assume a = 0.05. 2.5 Marks
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