7% of US adults have blood type O-negative. Suppose we take a random sample of 50 US a X represent the number of adults (out of the sample of 50) with blood type O-negative. This situation can be modeled with a binomial random variable X. Calculate the standard deviation of X. In the space below, provide your answer and round to thre

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7% of US adults have blood type O-negative. Suppose we take a random sample of 50 US adults. Let
X represent the number of adults (out of the sample of 50) with blood type O-negative. This
situation can be modeled with a binomial random variable X.
Calculate the standard deviation of X. In the space below, provide your answer and round to three decimal
places.
Transcribed Image Text:7% of US adults have blood type O-negative. Suppose we take a random sample of 50 US adults. Let X represent the number of adults (out of the sample of 50) with blood type O-negative. This situation can be modeled with a binomial random variable X. Calculate the standard deviation of X. In the space below, provide your answer and round to three decimal places.
X is a discrete random variable that represents the number of student emails that a professor
receives in any given day. The probability distribution for X is summarized in the table below:
P (X = x)
.035
1
.135
.265
3
.315
4
.250
Calculate the mean of X. In the space below, provide a numeric value rounded to two decimal places.
Transcribed Image Text:X is a discrete random variable that represents the number of student emails that a professor receives in any given day. The probability distribution for X is summarized in the table below: P (X = x) .035 1 .135 .265 3 .315 4 .250 Calculate the mean of X. In the space below, provide a numeric value rounded to two decimal places.
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