Step-by-step explanation:
If the equation is 55 - 0, the answer is 55
Answer: 
Step-by-step explanation:

Answer:
<u>Use Two sided t-test</u>
<u>Step-by-step explanation:</u>
Note that, there are other tools to test for significant difference such as simple regression or multiple regression<em> but when comparing the results of two groups in terms of which is higher or lower</em>, then a two sided t-test would be best appropriate.
Since we want to know if there is a significant difference between the number of tornadoes in August and the number of tornadoes in October on average we use the two sided t-test because a Two sided t-test can show the possibility of positive or negative differences.
Answer:
4
Step-by-step explanation:
It is the highest point.
Answer: A
Step-by-step explanation: 70-15= 55