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Mathematics, 04.03.2021 02:40 kseniyayakimov

50 random teenagers were asked how many hours a day they use their phones. They spent an average of 7 hours a day with a standard deviation of 1.3. Based on the results, what is a reasonable range for the true mean number of hours a teenager spends on their phone? Base your range using a 95% confidence level. a. (7, 8)

b. (7.9, 8.1)

c. (7.1, 8.9)

d. (6.6, 7.4)

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