1) The mean and the median of a sample of three values are 36 and 32 respectively.

If the median is larger than the smallest value by 8, then the the sample variance = ________

2) In a sample data consisting of three observation, the mean is equal to the median and the sum of three values is 75. If the range of the three values is 56, then the sample variance = ________

The normal curve below shows the distribution of units of a product sold over 160 days. The mean is 58 units and the standard deviation is 5 units. 48 53 58 63 68 73 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 68 units? % b) below 53 units? % c) above 83 units? % 2. On approximately how many days are units sold ( Round to the nearest whole number. Total days = 160) a) above 58 units? b) below 83 units? c) below 53 or above 63 units? 3. Identify the interval containing the 41st 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 41st percentile units sold falls between and