An emergency service wishes to see whether a relationship exists between the outside temperature and the number of emergency calls it receives for a 7-hour period. The data are shown.

Perform the following steps.
a. Draw the scatter plot for the variables.
b. Compute the value of the correlation coefficient.
c. State the hypotheses.
d. Test the significance of the correlation coefficient at α = 0.05, using Table I.
e. Give a brief explanation of the type of relationship.

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Temperature68 74 82 88 93 99 101 No. of calls y 7 4 8 10 11 9 13