Question
Amtrak trains from Chicago to Portland arrived at Havre, MT, where they make a crew change, the following numbers of minutes late: 26, 17, 245,
Amtrak trains from Chicago to Portland arrived at Havre, MT, where they make a crew change, the following numbers of minutes late: 26, 17, 245, 19, 38, 42, 11, 0, 14, 44. Find the mean number of minutes late at Havre (to one decimal place).
A.60
B.52.4
C.48.6
D.45.6
Which one of the three variables below is most likely to be normally or nearly normally distributed?
A.The results of throwing a die 1000 times
B.The lengths of randomly selected white pine needles
C.The number of people standing in line at five cash registers
D.None of the above
The advertising for a cold remedy claimed that no other cold remedy acted faster. In an experiment to compare that remedy with another one, it did act faster on average, but the result wasn't significant. What does this mean?
A.The difference was so small that it could have happened by chance even if the remedies were equivalent.
B.The difference was so small that it could have happened by chance even if the remedies weren't equivalent.
C.The probability of the observed difference occurring by chance if the two remedies are equivalent was less than 0.05.
D.The population mean response times are different, but the samples didn't show it.
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