Time-Series Graphs. In Exercises 9 and 10, construct the time-series graph.

Home Runs Listed below are the numbers of home runs in major league baseball for each year beginning with 1990 (listed in order by row). Is there a trend?

Problem 10BSC

Answer:

Step1 of 3:

We have Listed below are the numbers of home runs in major league baseball for each year beginning with 1990 (listed in order by row).

3317 |
3383 |
3038 |
4030 |
3306 |
4081 |
4962 |
4640 |
5064 |
5528 |

5693 |
5458 |
5059 |
5207 |
5451 |
5017 |
5386 |
4957 |
4878 |
4655 |

Step2 of 3:

We need to check Is there a trend?

Step3 of 3:

Let us know what is trend?

Consider,

Trend:A trend line, often referred to as a line of best fit, is a line that is used to represent the behavior of a set of data to determine if there is a certain pattern. A trend line is an analytical tool used most often in conjunction with a scatter plot (a two-dimensional graph of ordered pairs) to see if there is a relationship between two variables.

A line graph is obtained by using Excel and steps are as follows

Enter the given data in Excel sheet

select data(data column) go to insert

choose line chart then press ok

right click on graph then select add trendline

From above graph we can say that there is no such regular trend but in general the number of home runs is first increasing then decreasing.but finally when compared to starting year the performance of the team has increased in the middle and later decreased.