In the community of August Town the number of cell phones in a household is a random variable W with the following distr

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In the community of August Town the number of cell phones in a household is a random variable W with the following distribution: W 5 P(W) 0.05 The probability that a randomly-selected household has at least two cell phones is Select one: O 0.20 O 0.45 O 0.55 0.80 0 b .1 b 2 0.25 3 3b 4 2b

Thirty-two percent (32%) of adult males in Jamaica indicated that they have been tested for HIV at some point in their life. Consider a simple random sample of 11 adult males, find the probability that exactly 6 of them have been tested for HIV. Select one: O 0.320 O 0.072 O 0.520 O 0.344

In a dental office, the following probability distribution was obtained for the number of root canals completed in a given week. Find the standard deviation for the random variable. Number of root canals Select one: O 2.38 O 1.04 O 1.30 O 1.54 0 1 2 3 4 Probability 0.30 0.40 0.20 0.06 0.04

Researchers studying the effects of a new diet found that the weight loss over a one-month period by those on the diet was normally distributed with a mean of 9 pounds and a standard deviation of 3 pounds. What is the least weight that an individual would have had to lose to be in the top 5% of weight losers? Select one: 04.05 lbs O 15.99 lbs O 13.95 lbs 14.88 lbs