Question

Hypothesis Testing: When Population Standard Deviation is Known A study found that the average stopping distance of a school bus traveling 50 miles per hour was 2064 fes. A group of automotive engineers decided to condluct a study of 1. this company's school buses and found that for 20 buses, the avcrage stopping distance of buses traveling at 50 miles per hour was 262.4 feet. Previous studies indicated that the standard deviation of the stopping distance for such buses traveling 50 miles per hour is 3 feer. If we can assume the stopping distances are normally distributed. Let alpha-0.01 Is the stopping distance for this company's school buses less than 264 feet?

Answer 1

Date Page ns Criven '-三262-4 fed s-3-feet 20, We want ·he3b The siopping distance fis campany' schal buse 15 not less than-264-fed tie-u224 H The sto pping distance fra companys schoo use isless than sh Peetuc "X-시드 262-4-269 3 2b 6. 708 - 2.38s 2.38 S E-entical Valu, at e-o.ol i s 드 2. Ss.g S in -cal (wlate (2.539 thi stbepins ditance fo omanys s chool buses is not less than 264 fot Candusim -