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Assume that adults have IQ scoresthat are normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test). Find the probability that a randomly selected adult has an IQ between 90 and 120 (somewhere in the range of normal to bright normal).
What is the formula that you would use? Please solve and show your work.
The probability of an randomly selected person quits a team is 0.125. Assume the team has n members. Determine the smallest n that the team needs to have if the probability of the team has at least 20 members left is 0.9.
Office Visits what is the age distribution of patients who make office visits to a doctor or nurse?
The owner of a local casino. Recently, the operations department proposed to introduce one new gambling game. There are two options. The probability distributions of payout (i.e., the money player will win) for a player in the two options are ..
The dice game craps is played as follows. The player throws two dice, and if the sum is seven or eleven, then he wins. If the sum is two, three, or twelve, then he loses. If the sum is anything else, then he continues throwing until he either thro..
Construct a 95% Confidence Interval of the population mean of minutes exercised per week.
Suppose a one tailed t test is being applied to find out if the population mean is less than $120. The level of significance selected is 0.01 and 26 bank accounts were sampled.
a bag contains 4 balls among which k balls are red and the rest are green. assume that k has a prior distribution which
you play two games against an opponent. the probability you win the first game is 0.7. if you win the first game the
Fizz fizz soda comes in two varieties, regular and diet. If a researcher has 8 boxes of each, how many ways can he select 2 boxes of each for a quality control test? Which answer would be correct?
Finding the probability value for the given data using normal approximation
A robot, when working properly, produces 5% or less defective items. whenever the robot produces more than 5% defective items, needs repair.
assuming a line of regression of y 2.1 0.8x between temperatures and production yield. if the average temperature is
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