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What percent of the area under the normal curve is between z=2.25 and
z=0.58
Consider a population consisting of 2,6,8,0 and 1. Suppose a sample size of 3 are drawn from this population. Find the Mean and Variance of the sampling distribution of sample means.
Consider a population consisting of 2,6,8,0 and 1. Suppose samples of size 2 are drawn from this population. Find the Mean and Variance of the sampling distribution of sample means.
Find the variance and standard deviation of the probability distribution of the random variable X, which can take only the values 3,5, and 7, given that P (3) = (7)/(30),P(5) = (1)/(3),P(7) = (13)/(30)
A population consists of the four numbers 1, 2, 4 and 5. List all the possible samples of size n = 3
which can be drawn with replacement from the population.
A factory produces fuse. The probability of selecting a defective fuse is 0.045. A sample of 15 fuses were selected. Calculate the probability of getting 12 non defective fuses
The probability of getting a defective bottle from a manufacturer is 0.05. A sample of 10 bottles were selected. Calculate the probability of getting 2 defective bottles.
A random sample of 200 travel insurance policies contain 29 of which the policy holders made claims in their most recent year of cover. Calculate a 99% confidence intervel for the proportion of policyholders who makes claims in a given year of cover.
A random sample of size n=36 has a standard deviation of 7. Calculate approximately that the mean of this sample is greater than 44.5. While the mean of the population is 42
A manufacturer produces fuses. The percentage of non defective fuses is 0.96. A sample of 100 fuses was selected. Use normal approximation to binomial distribution to find the probability of selecting more than 6 defective fuses
