00:01
From the question, we know that the number of viewers in a sample who prefers nino follows a binominal distribution.
00:11
And the number can take four values, which are 012 and 3.
00:22
And the probability that it takes value 0 equals according to the formula of the binomial distribution, it's 3 to 0.
00:34
0 .5 to a power of 0 and 048 to a power of 3.
00:47
And the value is 0 .1592.
00:56
And it's similar for the other probabilities when the number takes 1, 2 ,3.
01:31
And the values are 0 .35944, 0 .3896, and 0 .1408.
01:54
And for 14068.
01:55
And for par b, this is a histogram.
02:00
For par c, we want to know the probability that the number is exactly 1.
02:08
And it's just here .395944.
02:19
For per d, first we want to know the mean of y.
02:24
And according to the formula of the expectation of the binominal distribution, the mean of the expectation is just n p...