The data plot above shows the coffee temperature at McDonald's in an n=24 hour period. 2. According to the data plot of

[answerhappygod]

The data plot above shows the coffee temperature at McDonald's
in an n=24 hour period.
2. According to the data plot of coffee temperatures which
of the following models appropriately describes these values.
Why?
a. Model with no trend:
Yt = Mean + error; There is no trend in the
data.
b, Model with trend:
Yt = b0 + b1 Time
Trend + error; There is a linear upward trend in the data.
c. Model with trend:
Yt = b0 + b1t +
b2 Time Trend2 + error. There
is a Quadratic trend or curve
in the data
3. The variation in temperatures around the mean value, measured
by standard deviation s = 5.37. Find the 95 percent
prediction interval around the mean. Interpret your
answer. (Use formula provided)