A random sample of 8 years of Denver, Colorado weather records gave a sample average number of sunny days per year of 263 sunny days with standard deviation 24 days. An independent random sample of 6 years of weather records from Phoenix, Arizona had an average of 296 sunny days per year with standard deviation 18.3 days. Test to see if the population mean numbers of sunny days are different for the two cities. Use a 1% significance level.

Ajar of gumballs contains 4 reds, 2 greens, and 6 blues. what is the probability of getting two blues in a row without replacement?

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?