Submit your r program) a discrete random variable y has sample space {1, 3, 7} and probability distribution {.2, .3, .5}. using r, you are to do the following: (a) find the expected value and population variance of y. (b) using 25,000 replications (artificial datasets) for sample sizes n = 10 and n = 1000, plot the distribution of the sample means. also plot the distribution of the sample variances. you must use ggplot to prepare your graphs.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

no solution

step-by-step explanation:

there is not enough information in the problem to solve.

image for option 4

step-by-step explanation:

i just know the internet

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.