The mean and median of a sample of three values are 30 and 32 respectively. If the median is smaller than the largest value by 3, then the sample variance : 6.3333 x The normal curve below shows the distribution of units of a product sold over 300 days. The mean is 53 units and the standard deviation is 5 units. 38 43 48 53 58 63 68 Units Sold Use the empirical rule (68-95-99.7 rule) to answer the following questions. 1. Approximately what percent of daily units sold are (Do not round percent values) a) between 48 and 58 units? 68 b) below 38 units? 0.15 o c) above 80 units? 0 2. On approximately how many days are units sold (Round to the nearest whole number. Total days = 300) a) above 53 units? 150 b) below 80 units? 300 c) below 43 or above 63 units? 15 3. Identify the interval containing the 67th percentile in the normal curve above. Select the two consecutive values containing the interval from those listed. Place the smaller of the two in the first box and the larger in the second box. The 67th percentile units sold falls between 48 and 52