Math 101 Stats Worksheet Name Directions: Show all work. Credit will not be given for unjustified answers. 1. (4pts) For: 11, 8, 2, 9, 5, find the A. Mean: B. Median: C. Midrange: D. Range: 2. (2pts) A website you are reading reports that in a survey with 2400 responses, 6% of people believe that the Mitt in Mitt Romney's name stands for "Mitten\". What is the margin of error and what does it mean for this survey? The margin of error is %, it means there is a % probability the true percentage of people who believe Mitt is short for Mitten is between % and %. 3. (3pts) The ages of the 32 recruits in police academy are normally distributed with a mean of 27 with a standard deviation of 2. Label the normal distribution curve, then use the 68-95-99] rule to answer the questions. A. What percent of the recruits are between ages 23 and 27? B. Approximately how many recruits are at most 29? 4. (4pts) The exam scores from the final exam in History 105 at the U of M are normally distributed. The mean score was 68 and the standard deviation is 10. There were 1250 students who took the exam. A. What percentage of the students got an A on the exam (scored 90 or better)? B. Approximately how many students got a C on the exam (scored 70-79)