Math Answers

Consider a population consisting the scores of 6 students in a statistic test 18, 22, 25, 28, 32, 36

List the possible samples and the corresponding means in the table

Consider a population consisting the scores of 6 students in a statistic test 18, 22, 25, 28, 32, 36

given a population of 2000 normally distributed stores with mean equal to 74, and a standard deviation of 6. How many scores are between 84 and 74

Random samples of size 4 are drawn with replacement from a finite population 3,6,9. Find the variance of the sample and the standard deviation of the sample

A box contains 20 balls that are exactly alike except that 10 are red, 6 are blue, and 4 are black. (a) If a single ball is drawn from a box, what is the probability tat it is red? (b) If a single ball is drawn from the box, what is the probability that it is blue or black? (c) If instead two balls are drawn from the box at the same time, what would be the probability that both are black?

Lindiwe decides that she would like to buy her daughter a car when she turns 21 in six years time .She deposits R 6000 each month into an account earning 8.94% interest per year compounded monthly. The amount that Lindiwe will have available in six years from now is.

Colored Wheel

A survey on 200 Senior High School learners on how much time they read per

week has a confidence interval of (13.5, 17.9) in hours at 95% confidence level.

What is the margin of error? _________________________

What is the average time they read per week? __________________

Compute the length of the confidence interval for estimating the population

mean using a sample size of 300 and with a standard deviation 84. Use a 92%

confidence level.

Write the probability distribution of a random variable R representing numbers of red ball when 3 balls are drawn in succession without replacement from a jar containing 4 red and blue balls

Suppose the mean number of days to germination of a variety of seeds is 34, with a standard deviation of 4.3 days. What is the probability that the mean germination time of a sample of 250 seeds will be within 0.5 days of the population mean?