7.2.11 Like hurricanes and earthquakes, geomagnetic storms are natural hazards with possible severe impact on the earth. Severe storms can cause communication and utility breakdowns, lead- ing to possible blackouts. The National Oceanic and Atmospheric Administration beams electron and proton flux data in various energy ranges to various stations on the earth to help forecast pos- sible disturbances. The following are 25 readings of proton flux in the 47-68 kEV range (units are in p/(cm2-sec-ster-MeV)) on the evening of December 28, 2011: 2310 2320 2010 10800 2190 3360 5640 2540 3360 11800 2010 3430 10600 7370 2160 3200 2020 2850 3500 10200 8550 9500 2260 7730 2250 a. Find a point estimate of the mean proton flux in this time period. b. Find a point estimate of the standard deviation of the pro- ton flux in this time period. c. Find an estimate of the standard error of the estimate in part (a). d. Find a point estimate for the median proton flux in this time period. e. Find a point estimate for the proportion of readings that are less than 5000 p/(cm2-sec-ster-MeV)