Which event has a 50% chance of occurring? A rolling a 2 with a fair number cube numbered 1 to 6. B rolling a number less than 5 on fair number cube numbered 1 to 6. C a fair spinner that has equal parts blue, yellow, and red, stopping on blue. D a fair spinner with equal parts red and blue, stopping on red

The contents of 3838 cans of coke have a mean of x¯¯¯=12.15x¯=12.15. assume the contents of cans of coke have a normal distribution with standard deviation of σ=0.12.σ=0.12. find the value of the test statistic zz for the claim that the population mean is μ=12.μ=12.

Factor the polynomial by its greatest common monomial factor.

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables