A multinational firm wants to estimate the average number of hours in a month that theiremployees spend on social media while on the job. A random sample of 83 employees showedthat they spent an average of 21.5 hours per month on social media, with a standard deviationof 2.5. Construct and interpret a 95% confidence interval for the population mean hours spenton social media per month.

95% of the population spent between 16.8 hours to 26.2 hours on social media per month

Step-by-step explanation:

subtracting 1 from sample size: 83-1= 82Note Mean=21.5 and standard deviation=2.5Subtracting confidence interval from 1 and dividing by 2: (1-0.95)/2=0.025At α=0.025 and dF=82,  the t-distribution table gives  1.984Divide standard deviation by square root of sample size: 21.5/√83= 2.36Multiplying answer in step 4 by answer in step 5: 2.36×1.984= 4.68 For lower end: 21.5-4.68= 16.82for upper end: 21.5+4.68=26.18