1. Scientists randomly select ten groups from a population of men over 50 years old. They calculate the mean
1 answer:
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Answer:
(b)$29.62
(c)$5.73
Step-by-step explanation:
Basic: Standard internet for everyday needs, at $24.95 per month.
Premium: Fast internet speeds for streaming video and downloading music, at $30.95 per month.
Ultra: Super-fast internet speeds for online gaming at $40.95 per month.
Let the number of customers on Ultra=x; therefore:
Number of Premium customers =2x
Number of Basic customers =3x
Total=x+2x+3x=6x
(a)X=Monthly fee paid by a randomly selected customer.
Therefore, the probability distribution of X is given as:
(b)Average Monthly Revenue per customer
Mean,
(c)Standard Deviation