00:01
Carl recorded the number of customers who visited his new store during the week.
00:06
And on monday, he saw 17 customers.
00:16
Tuesday, there were 13 customers.
00:29
Wednesday, there were 14 customers.
00:35
And on thursday, there were 16 customers.
00:47
So the number of customers is your observed data.
00:52
He expected to have 15 customers each day.
01:18
So we want to find the chi square test statistic.
01:21
And to find the chi square test statistic, we are using the formula, the sum of o minus e squared over e.
01:40
And the sum symbol should be a little bit larger.
01:45
So what does that mean? we are going to start with a new column called o minus e, and we're going to find the deviation from expected.
01:54
So on monday, we had two more than expected.
01:57
On tuesday, we had two less than expected...