Chapter 5.2, Problem 61E

To determine

To analyze the relationship between average crawling age and average temperature.

Answer to Problem 61E

The negative correlation between average temperature and average crawling age.

Explanation of Solution

Given:

The data:

Birth month	Average crawling age	Average temperature
January	29.84	66
February	30.52	73
March	29.7	72
April	31.84	63
May	28.58	52
June	31.44	39
July	33.64	33
August	32.82	30
September	33.83	33
October	33.35	37
November	33.38	48
December	32.32	57

To analyze the relationship between them, we need to plot scatter plot. Using excel,

  

Therefore, there is negative correlation between average temperature and average crawling age. That is, when average temperature increases then average crawling age increases and vice versa.