Bus 220 Elementary Statistics

B D E F G H I J K L M 16 3.1 Chpt 5 O There are 15 snakes in a barrel: 10 are pit vipers, 5 are coral snakes. You are blindfolded & reach into the barrel removing one snake, then reach in again removing another & placing them both in your pocket. Find the probability of two coral snakes? Chpt 6 A study by Stanford University concluded that 45% of college students sleep at least 8 hours per night. In a sample of 10 DCCC students, find the probability that at least 8 of the 10 get 8 or more. Chpt 7 If mean GPA at BDU is 2.60 with o = .40, what GPA would get you into the 99.49th percentile? Chpt 8 The student population at DC is sleep deprived with u = 6.25 hoursight & Gxbar = .1 hrs. A sample of 25 students reveals a sample mean of 6.75. Find the probability that this sample mean is within 15 min of u Chpt 9 A sample of 36 college baseball pitchers reveals that their average fast ball travels 89 mph, o for this population is 6.4 mph Find the 93.8% margin of error. Chpt 10 Since Scotland's Diva Vodka costs around $3700 per bottle, customers insist that the bottles be properly filled with exactly 1200 ml of premium vodka. Diva's QC engineer takes samples throughout the day & uses an a of .1. The last sample of 4 bottles held an average of 1192 ml with a std dev of 6 ml. If you were testing for the correct fill, find the test statistic. Chpt 12 Pat's slices their cheesesteak steak with a Berkel 850A slicer which turns out steak slices with a mean thickness of 1.5mm & a standard deviation of .2mm in a sample of 22 slices. Ginos, who use a Chef's Choice 667, also sliced a sample of 16 slices with a mean of 1.5mm, but their standard deviation was .29mm. Pat's found this out & put up a sign saying, "Our steaks are more better than Gino's because our slices are more consistent & besides we can speak other languages!" If you were doing an ANOVA F test for different variences, what's H1? Chpt 15 If the index of the cost per pound of squid tentacles is currently 45 & a pound costs $8.45 today, how much were they in the baseline year? Chpt 17 Bowling magazine reports that 12% of men wear size 9 shoes, 40% size 10, 20% size 11, 18% size 12 & 10% size 13. If you stock your bowling alley with 250 bowling shoes as follows, fins the Chi-squared test statistic. Size Shoes 9 20 10 110 11 50 12 40 13 30 250