researchers-measured-the-simple-reaction-times-milliseconds-of-a-random-sample-o

Question

Researchers measured the simple reaction times (milliseconds) of a random sample of drivers and cyclists under identical conditions. From these samples, they computed a $95 percent sign$ confidence interval for the difference in population mean reaction times (drivers minus cyclists) as:
$- 15 ms < μ_{driver} - μ_{cyclist} < 5 ms$
What does this confidence interval suggest about whether the mean reaction time of drivers equals the mean reaction time of cyclists?

Accepted Answer

There is no significant difference in mean reaction times between drivers and cyclists

Answer

Drivers have a significantly faster mean reaction time than cyclists

Answer

Cyclists have a significantly faster mean reaction time than drivers

Answer

The mean reaction time of drivers is at least 5 ms5\:	ext{ms} faster than cyclists