There are 31 troughs that meet the company’s requirements.
2)
If the data set has a mean of 10.0 seconds and a standard deviation of 2.0 seconds, what is the
corresponding z-score to the time of 4.0 seconds?
3)
Suppose 95% of the data falls between 12.4 and 46.8 units.
Using the empirical rule, give an
estimate of the standard deviation.
4)
Make a stem and leaf plot of the data, what is the shape of the data
45, 111, 105, 50, 48, 77, 71, 51, 55, 92, 56, 57, 65, 62, 51, 68, 44, 68, 57, 62, 91, 57
Insert stem and leaf plot below:
5)
Use the 22 average daily temperatures and the 22 corresponding 22 amounts of energy
consumption (kWh) to construct a scatter plot in Excel.
Based on the graph, is there a
relationship between the 2 variables?
Identify at least one reason as to why there is or isn’t a
relationship.
Average Daily Temp.
kWh
29
3637
37
2888
57
2359
74
3704
66
3432
47
2446