Help Amanda used a
standard deck of 52 Hearts All
cards and selected a
card at random.
She recorded the suit
of the card she picked,
then replaced the card.
The results are in the
table to the right.
Based on her results, what is the experimental
probability of selecting a heart?

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