Daily high temperatures in St. Louis for the last week were as follows: 95, 94,

Question

Daily high temperatures in St. Louis for the last week were as follows: 95, 94, 95, 94, 95, 90, 95 (yesterday).

a) The high temperature for today using a 3-day moving average = ? degrees (round your response to one decimal place).

b) The high temperature for today using a 2-day moving average = ? degrees (round your response to one decimal place).

c) The mean absolute deviation based on a 2-day moving average = ? degrees (round your response to one decimal place).

d) The mean squared error for the 2-day moving average = ?degrees squared (round your response to one decimal place).

e) The mean absolute percent error (MAPE) for the 2-day moving average = ? (round your response to one decimal)

(PLEASE EXPLAIN HOW TO DO THIS IN TI 84 PLUS ALSO)

Explanation / Answer

Mean absolute deviation for 2-day moving average=8.5/6=1.4

Mean squared error=17.25/6=2.9

Mean absolute percent error=(0.09067/6)*100=1.5%.

Day 2-day moving totals 2-day moving average 3-day moving totals 3-day moving average absolute deviation squared error 1 98 2 94 192 96 287 95.7 2 4 3 95 189 94.5 283 94.3 0.5 0.25 4 94 189 94.5 284 94.7 0.5 0.25 5 95 189 94.5 279 93 0.5 0.25 6 90 185 92.5 280 93.3 2.5 6.25 7 95 185 92.5 2.5 6.25 Total 92.5 8.5 17.25

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