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An octahedron was used as dice in a special edition of snakes and ladders. A player throws the die twice and takes the sum before making a move. Find the mean and variance of the sum of two throws of the die.
A population consist of three numbers 4,5 and 6 list all possible samples of size n=2 which can be drawn with replacement from the population
1)Given P (A) = 0.30, P (B) = 0.78, P (A∩ B) = 0.16; evaluate
A) A complement intersection B complement
B) A complement union B complement
C) A intersection B complement
in one city 52.6% of adults are female . 9.5% of adults are left handed and 5.3 % are left handed female p( f or l ) . round approximation to the three decimal places
An advertising firm offers a promotional package that includes for coffee mugs and five desk calendars each printed with the logo of your company and chipped in a display box in manufacturing process of the mugs results and products that have a weight of 6 ounces with a standard deviation of 2 oz the calendars are manufactured with a mean weight of 8 oz of standard deviation of 3 oz shipping boxes have a mean way to 3 oz and a standard deviation of 1 ounce assume the weights of the items are independent and normally distributed what are the mean and standard deviation of the weight of the promotional package
A and B manufacture two types of cables, having mean breaking strengths
of 4000 and 4500 lb and standard deviations of 300 and 200 lb,
respectively. If 100 cables of brand A and 50 cables of brand B are tested,
what is the probability that the mean breaking strength of B will be (a) at
least 600 lb more than A, (b) at least 450 lb more than A?
1. In a box having 6 light switches, the probability of having a defective switch is 0.3 and the probability of having no defective switch is 0.6. Find the probability that there is at most 1 defective light switch in a box.
distribution of u^2.
Given a standard normal distribution, find the area the curve between z=-1.97 and z=0.86.
1)Suppose that the population distribution of the gripping strengths of industrial workers is known to have a mean of 110 and standard deviation of 10. For a random sample of 75 workers, what is the probability that the sample mean gripping strength will be
a)Between 109 and 112?
b)Greater than112?
2)On the average, five smokers pass a certain street corners every ten minutes, what is the probability that during a given 10minutes the number of smokers passing will be
A)6 or fewer
B)7 or more
C)Exactly 8
