95% = mean ± 1.96 SD
Take it from there.
. A grocery story recorded amount of time that 20 randomly selected shoppers waited
checkout lines. The mean was 322 seconds (5 minutes, 22 seconds) and the standard
deviation was 48 seconds. Construct a 95% confidence interval for the mean wait time
for all of the shoppers at the grocery store. (You must show work and/or TI
calculator commands to receive credit. You may give your answer in seconds)
1 answer
1 answer