Calculate the P(return > 3.35):

Calculate the P(-15.32

Find x such that P(return

Find x such that P(return > x) = 0.647 :

Calculate the lower limit of a 99% confidence interval for the population mean:

Calculate the test statistic for the null hypothesis that the population mean is equal to 0 :

Open Adj Close Volume 1990-01-01 1.814815 1.913580 1.703704 1.734568 1.067725 106764075 1990-02-01 1.746914 1.993827 1.722222 1.962963 1.208316 88269750 1990-03-01 1.969136 2.333333 1.391835 149977575 1990-04-01 2.234568 2.388889 2.197531 2.308642 1.422257 93168225 1990-05-01 2.358025 3.043210 2.320988 2.993827 1.844370 184159575 2.703704 2.851852 1.756906 161179875 1990-06-01 3.024691 3.111111 1990-07-01 2.851852 3.231481 2.518519 2.537037 1.562962 162596700 1990-08-01 2.527778 2.777778 2.120370 2.509259 1.546941 265967550 1990-09-01 2.481481 2.611111 2.148148 2.250000 1.388475 136344600 1990-10-01 2.277778 2.527778 1.981481 2.175926 1.342764 215924400 1990-11-01 2.185185 2.120370 2.648148 1.634173 179213850 1990-12-01 2.703704 3.037037 2.694444 2.861111 1.767162 127218600 2.694444 Date High Low Close 1.956790 2.259259 Open Adj Close Volume 1990-01-01 1.814815 1.913580 1.703704 1.734568 1.067725 106764075 1990-02-01 1.746914 1.993827 1.722222 1.962963 1.208316 88269750 1990-03-01 1.969136 2.333333 1.391835 149977575 1990-04-01 2.234568 2.388889 2.197531 2.308642 1.422257 93168225 1990-05-01 2.358025 3.043210 2.320988 2.993827 1.844370 184159575 2.703704 2.851852 1.756906 161179875 1990-06-01 3.024691 3.111111 1990-07-01 2.851852 3.231481 2.518519 2.537037 1.562962 162596700 1990-08-01 2.527778 2.777778 2.120370 2.509259 1.546941 265967550 1990-09-01 2.481481 2.611111 2.148148 2.250000 1.388475 136344600 1990-10-01 2.277778 2.527778 1.981481 2.175926 1.342764 215924400 1990-11-01 2.185185 2.120370 2.648148 1.634173 179213850 1990-12-01 2.703704 3.037037 2.694444 2.861111 1.767162 127218600 2.694444 Date High Low Close 1.956790 2.259259