(Solved): helpp 5) A sample of experienced typists revealed that their mean typing speed is 87 words \( \mathr ...

5) A sample of experienced typists revealed that their mean typing speed is 87 words \( \mathrm{Det} \) minute and the median typing speed is 73 words per minute. The standard deviation A) \( -4.2 \) B) \( -2,5 \) C) \( +4.2 \) D) \( +2.5 \) 6) The 75 th percentile is referred to as the A) first quartile B) fourth quartile C) second quartile D) third quartile 7) A rug manufacturer has decided to use seven compatible colors in her rugs. However, in weaving a rug, only five spindles can be used. In advertising, the rug manufacturer wants to indicate the number of different color groupings for sale. How many color groupings using the seven colors taken five at a time are there? (This assumes that five different colors will go into each rug - in other words, there are no repetitions of color.) A) 42 B) 7 (C) 21 D) 840 8) The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the distribution's standard deviation? 9) For the normal distribution, the mean plus and minus two standard deviations will include about what percent of the observations? A) \( 99.7 \% \) B) \( 50 \% \) C) \( 95 \% \) D) \( 68 \% \) 10) For the following distribution. What is the mean of the distribution? A) \( 0.113 \) B) \( 1.140 \) C) \( 2.100 \) D) \( 0.564 \) 11) A survey of top executives revealed that \( 25 \% \) of them regularly read Time magazine, \( 22 \% \) read Newsweek, and \( 44 \% \) read U.S. News \& World Report. A total of \( 11 \% \) read both Time and U.S. News \& World Report. What is the probability that a particular top executive reads either Time or U.S. News \& World Report regularly? mean life for a particular use before they failed is \( 19.0 \) hours. The distribution was \( 1.2 \) hours. A) \( 14.1 \) and \( 22.1 \) B) \( 8.9 \) and \( 18.9 \) C) \( 12.2 \) and \( 14.2 \) D) \( 16.6 \) and \( 21.4 \) 13) The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the probability that a flight is more than 140 minutes? A) \( 1.000 \) B) \( 0.333 \) C) \( 0.500 \) D) \( 0.067 \) 14) What is the probability that \( z \) is between \( 0.0 \) and \( 2.0 \) ? A) \( 1.0000 \) B) \( 0.7408 \) C) \( 0.4772 \) D) \( 0.1359 \)