A factory manager estimates that the average weight of a manufactured product is 12.5 kg with some variability. At least how many products must be sampled to be 90% confident that the true mean weight is estimated within ±0.5 kg, assuming the population standard deviation is 2.0 kg? TI-84 online

If Var(X) = 9, Var(Y) = 16, and Cov(X,Y) = 6, what is the correlation coefficient ρ(X,Y)?

Use this dataset to answer the next 6 questions, you will need the list of data for the questions too, do not delete it on your calculator. The following dataset represents the test scores of 15 randomly selected students in a recent statistics exam out of a total score of 130: . The median of the scores is _______ ? TI-84 online

The joint probability mass function for discrete random variables X and Y is given in the table below: X\Y 1 2 0 0.2 0.3 1 0.1 0.4 What is the conditional probability P(Y=2|X=1)?

The joint probability mass function for discrete random variables X and Y is given in the table below: X\Y 1 2 0 0.2 0.3 1 0.1 0.4 What is P(X = 1|Y = 2)?

Which lobes receive and interpret sensory input for hearing?

Which brain division controls involuntary functions such as breathing and heart rate?

The source of new variation in a population is 

The tail and paired pharyngeal pouches are

Radioactive dating techniques are an example of a reltive dating method.