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5.) The average selling price of an iPhone purchased by a random
sample of 35 customers in 2019 was $315. Assume the population
standard deviation was $38. Construct a 95% confidence interval
to estimate the average selling price in the population with this sample.
(What are the UCL and LCL?)
a.) 302.42, 327.58
b.) 278.10, 387.55
c.) 318.07, 339.72
d.) 292.30, 345.19

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