Twelve dieters lost an average of 11.3 pounds in 6 weeks when given a special diet plus a herbal formula. A control group of twelve other dieters were given the same diet, but without the herbal formula, and lost an average of 9.1 pounds during the same time. The standard deviation of the sample was 2.2 and the standard deviation of the control group was 2.5. Find the confidence interval for the differences of the means.

5050 i think

step-by-step explanation:

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560

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