PROBABILITY HELP PLZZZ!?
1.Suppose that a judge’s verdict is correct 90% of the time. In his next 10 decisions, what is the probability that he makes fewer than 2 incorrect verdicts?
2.The amount of time necessary for assembly line workers to complete a product is a normal random variable with a mean of 15 minutes and a standard deviation of 2 minutes. So 90% of the products require more than ______ minutes for assembly.
3.Which of the following statements about the sampling distribution of the sample mean is incorrect?
a.The sampling distribution of the sample mean is approximately normal whenever the sample size is sufficiently large (n ? 30).
b.The sampling distribution of the sample mean is generated by repeatedly taking samples of size n and computing the sample means.
c.The mean of the sampling distribution of the sample mean is equal to ยต.
d.The standard deviation of the sampling distribution of the sample mean is equal to ? / standard deviation.
4. A manufacturer of power tools claims that the average amount of time required to assemble their top of the line table saw in 80 minutes with a standard deviation of 40 minutes. Suppose a random sample of 64 purchasers of this table saw is taken. The probability that the sample mean will be less than 82 minutes is _____.
Honest…honestly
For z approx 1226 why standardized variable for normal distribution lookup table for 010 1] 01^1 01^10 0736 answer 90 of success [01] fewer than incorrrect.
For z approx 0655 probability sample of the sampling distribution trials [10] successes [01] fewer than 82 805 cumulative normal distribution trials [10] successes [01] fewer.