11 The following table shows the cumulative frequencies for values of x. <0 <10 <15 <25 < 30 < 40 of 30 90 102 120 12 Without drawing a cumulative frequency graph, find: a the interquartile range b the 85th percentile.

Use the Histogram tool to develop a frequency distribution and histogram for the number of months as a customer of the bank in the data below. Compute the relative and cumulative relative frequencies and use a line chart to construct an ogive.   Complete the frequency distribution for the months as a​ customer, and compute the relative and cumulative relative frequencies. ​(Type integers or decimals rounded to three decimal places as​ needed.) Bins Frequency Relative Frequency Cumulative Relative Frequency 10 enter your response here   enter your response here   enter your response here   20 enter your response here   enter your response here   enter your response here   30 enter your response here   enter your response here   enter your response here   40 enter your response here   enter your response here   enter your response here   50 enter your response here   enter your response here   enter your…

How to construct the frequency distributions? Write down the steps.

The times taken in seconds by a group of students to complete an online exercise are listed as follows. 31,34,41,33,29,31,39,35,30,40 (a) Find the median time. (b) Calculate the interquartile range.