. A population consists of 500 values having mean 50 and variance 5. Find mean and standard error of sampling distribution of means for sample size equal to 20 if sampling is done (i) Without replacement
(ii) With Replacement

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Which of the following parabolas opens down?

If i purchase a product for $79.99 and two accessories for 9.99 and 7.00 how much will i owe after taxes applies 8.75%