Question

A high school student wants to find out how much screen time people spend on their phones. He does a random sample and finds the following data for screen time (in minutes):

195

250

180

175

120

60

300

210

193

135

200

265

Construct and interpret a 95% confidence interval for the mean amount of screen time people have on their phones.  Remember to check all necessary critera.

Answer 1

Solution:- given that 195,250,180,175,120,60,300,210,193,135,200,265
X = 190.25, sd = 65.37, n = 12, 95% Confidence interval

95% confidence interval for the mean amount of screen time people have on their phones : (148.716,231.784)