a. Find the margin of error E for a 95% confidence interval. (5 points)
Round your answer to the nearest hundredths. . (References:
definition of margin of error on page 312 and example 2 on
b. Construct a 95% confidence interval for the mean life, of all Twinkle bulbs. (5 points) (References: example 5 page 315, end of section exercises 51 - 56 pages 319 - 320)
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