Aclothing store has a sale today with 1/3 off shirts and 1/4 off jeans. if you choose a shirt that is regularly $18.87 and a pair of jeans that are normally $55.96,how much change would you get back from $60?
a) $20.28
b) $54.55
c) $39.72
d) $5.45
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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