The Weather Underground reported that the mean amount of summer
rainfall for the northeastern US is at least 11.52
inches. Ten cities in the northeast are randomly selected
and the mean rainfall amount is calculated to
be 7.14 inches with a standard deviation of 1.3
inches. At the
? = 0.05
level, can it be concluded that the mean rainfall was
below the reported average? Assume the amount of summer rainfall
follows a normal distribution.
Part (c)
State alpha. (Enter an exact number as an integer, fraction, or
decimal.)