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- In general, ___________% of the values in a data set lie at or below the 28 th percentile. _______________ % of the values in a data set lie at or above the 90 th percentile.. If a sample consists of 700 test scores, _________of them would be at or below the 52 th percentile. If a sample consists of 700 test scores, ________ of them would be at or above the 64 th percentile.Teens who vape are likely to develop pneumonia 60% of the time, whereas teens who don’t vape are likely to develop pneumonia 3% of the time. About 20% of the teen population vapes. If you learn that a teen has pneumonia, what is the likely hood that they vape?In a population if you have µ = 10, σ = 2, and your z-score is +1.5, what is the value of X?
- question 1 Porshe shoes Store sells a shoes with discounts of 15 percent and 20 percent, while Judy Shoes Store sells the same type of shoes with discounts of 10 percent, 10 percent and 15 percent. (i) Determine which store offers a higher discount.A poll shows that half the consumers who use brand A switched to Brand b the following year, while the other half stayed with brand A. 9/10 of brand b users stayed with brand B the following year, while the rest switched to brand A. In the long term, what fraction of the time will a user spend using each of the two brands? Enter your answers as fractions l. Brand A: Brand B:A recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent. Suppose that a survey of 100 local seniors and 100 national seniors is conducted to see if the proportion of drug and alcohol use is higher locally than nationally. Locally, 65 seniors reported using drugs or alcohol within the past month, while 60 national seniors reported using them.
- In a recent marketing experiment, consumers were given one of four different types of dishwashing detergent and asked to use it for a month. At the end of that time they were asked to rate the detergent in terms of overall quality. The results are presented below. What percentage of the consumers rated their detergent average or better?What is the formula for calculating the covariance between two variables X and Y?A retailer sells two types of ski goggles. Thirty percent of the sales is of type A, and the rest is of type B. Six percent of all type A goggles are returned within 10 days after the sale, whereas only three percent of type B are returned. What percentage of goggles are returned within the first 10 days after the sale?
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