christingle2004
07.03.2020 •
Mathematics
A person's blood pressure is monitored by taking 3 readings daily. The probability distribution of his reading had a mean of 135 and a standard deviation of 3. a. Each observation behaves as a random sample. Find the mean and the standard deviation of the sampling distribution of the sample mean for the three observations each day. b. Suppose that the probability distribution of his blood pressure reading is normal. What is the shape of the sampling distribution? c. Refer to (b). Find the probability that the sample mean exceeds 140.
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Ответ:
B) 2600
Step-by-step explanation:
Set up a proportional equation and solve:
220/300=x/3545
(220)(3545)=300x
779900=300x
2599.666=x
2600=x
Your best estimate is B) 2600