Daily high temperatures in St Louis for the last week were a

Daily high temperatures in St. Louis for the last week were as follows: 95, 94, 94, 95, 96, 86, 90 (yesterday The high temperature for today using a 3-day moving average = nothing degrees

Solution

The temperatures in St. Louis for the last week were: 95, 94, 94, 95, 96, 86, 90.

If we calculate the high temperature for today using 3-day moving average then,

1st 3 day moving average = {(95+94+94)/3} [Taking the first 3 values]

= 94.34

2nd 3 day moving average = {(94+94+95)/3} [Taking the second 3 values]

= 94.34

3rd 3 day moving average = {(94+95+96)/3}

= 95

4th 3 day moving average = {(95+96+86)/3}

= 92.34

5th 3 day moving average = {(96+86+90)/3}

= 90.67

We can see that the 2 day moving averages are 94.34, 94.34, 95, 92.34, 90.67 so we cannot say that the trend is increasing or decreasing so the temperature may rise or fall.