Question

The data show the number of U.S. space launches for the 10-year periods from 1960 to 2009. Construct a time series graph for the data and analyze the graph.

Answer 1

Construct the time series plot for the number of U.S. space launches in the 10-year period from 1960 to 2009 by using MINITAB as shown in figure below:

 

MINITAB procedure:

Step 1: Choose Graph > Time Series Plot.

Step 2: Choose Simple, and then click OK.

Step 3: In Series, enter the column of Launches.

Step 4: Choose Time/Scale, and then click Stamp.

Step 5: In Stamp columns, enter the column of Year.

Step 6: Click OK.

 

MINITAB output:

 

Observation:

From above figure, it is clear that the launches had declined gradually from the year 1969 to 1989 and the launches increased in the period 1990 to 1999 and again there was a decreasing trend in the period 2000 to 2009.

From above figure, it is clear that the launches had declined gradually from the year 1969 to 1989 and the launches increased in the period 1990 to 1999 and again there was a decreasing trend in the period 2000 to 2009.