The owner of the pizza restaurant in France knows that time customers spend in restaurant on Saturday evening has mean 90 minutes and standard deviation fifteen minutes. He has read that pleasant odors can affect customers, so he spreads the lavender odor throughout restaurant. Here are times (minutes) for customers on next Saturday evening:15 (a) Create the stemplot of times. Distribution is roughly symmetric and single-peaked, so distribution of must be close to Normal. (b) Assume that standard deviation 15 minutes is not changed by odor. Is there reason to think that lavender odor has changed mean time customers spend in restaurant? Follow four-step process for significance tests.