Harry wants to buy a computer keyboard and is deciding whether to buy online or from a local store. to make his decision, he flips a refrigerator magnet. he repeats this experiment 50 times and records the results in this table. magnet side up magnet side down 13 37 the relative frequency of landing magnet side up is . the relative frequency of landing magnet side down is

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?