00:03
So for this one, they said they wanted a point estimate for the mean wine score.
00:10
So that's the average.
00:12
And then part b says develop a point estimate for the standard deviation.
00:17
So for the mean, you want to add up all the scores for the wine.
00:23
So the first one's 87, the second one's 91.
00:26
The last one's 96.
00:28
And then for the mean, you add all those up and divide by 12.
00:31
And i get a mean wine score of 82.
00:36
So that is part a, a point estimate for the mean.
00:42
Standard deviation is denoted by s, and standard deviation is how much each data value varies from the mean.
00:49
So the first one is 87, so you would do 87 minus 82, quantity squared, and then you do the next one, which is 91 minus 82, quantity squared plus dot, dot, dot, dot.
01:06
The last one, which is 96 minus 82, who's supposed to be 82, because that's your mean, quantity squared...