quartile

  1. J

    Histogram

    The table shows the salaries (£'000) of the employees of a company. Salary (£'000) Number of Employees 20 and less than 30 35 30 and less than 40 75 40 and less than 50 96 50 and less than 60 42 60 and...
  2. H

    Quartile and Standard deviation

    Here is the data 15 12.8 11.5 14.5 13.6 14.5 10.5 10.7 10.8 14.1 15.1 10.3 15 10.3 14.5 14.9 11.3 14.3 12.6 14.7 10.4 10.4 15 10.1 15 12.4 12.5 12 12.1 14.8 10.1 15 12.9 14.7 14.9 15.1 11 14 10.2 15.3 14.8 14.4 14.9 10.5 10.9 13.7 15.1 13.1 14.4 12.7 10.3 15.2 15.1 10.8 13.9 11.8 10.5...
  3. E

    Finding the first quartile of an exponential distribution.

    I have a question asking to a.) find the first quartile of an exponential distribution and b.) seeing how far it is below the mean. I get the integral of my distribution \frac{1}{\theta }e\left( -\frac{x}{\theta } \right) and get -e\left( -\frac{x}{\theta } \right) from a previous...
  4. L

    Simple quartile problem.

    A density curve consists of a straight line segment that begins at the origin (0,0) and has a slop 1. b) determine the median, first quartile, and third c) relative to the median, where would you expect the mean of the distribution? d) what percent of the observations lie below .5? above...
  5. B

    Upper Quartile & Lower Quartile

    The distribution of the birth weights of babies delivered at 40 weeks is approximately normal with a mean of 3500g and standard deviation of 430g. Calculate the upper quartile of birth weight. What is the lower quartile?
  6. cmf0106

    Creating Quartile Groups

    This is regarding a homework assignment, we are told to break the 51 states into 4 quantiles, by taking the total number of states in this case divided by the number of groups. But since 51 is obviously not a even number we do not get a whole number as a result (51/4=12.75). To get the 51 total...
  7. B

    inter quartile range help!!!

    Im either wrong or my textbook is wrong, the former being the most likely! 1 2 4 5 6 7 8 8 10 13 15 interquartile range... I did got the lower quartile as the 3rd value and the upper as the 9th, ie 4 and 10... so interquartile range = upper - lower...right? so 10 - 4 = 6 im a right...