The number of dry cleaning orders picked up at Sunny Fresh Dry Cleaners was sampled over 12 hour periods. Below is the sample:

142 171 125 91 140 125 97 125 162 142
125 117 89 125 140 128

From this data set, compute the sample mean, median, mode and midrange. Compute the 1st
quartile and 3rd and interpret their meanings.

Question

The number of dry cleaning orders picked up at Sunny Fresh Dry Cleaners was sampled over 12 hour periods.  Below is the sample:

142   171   125   91    140   125   97    125   162   142   
      125   117   89    125   140   128
 
From this data set, compute the sample mean, median, mode and midrange. Compute the 1st
quartile and 3rd and interpret their meanings.

amistre64 · Answer

the quartiles are prolly that most challenging

amistre64 · Answer

once you align these in ascending order; you can determine the quartiles by equating them to percentiles

amistre64 · Answer

Q0 =P0
Q1 = P25
Q2 = P50
Q3 = P75
Q4 - P100

amistre64 · Answer

i count 16 terms; Q1 = P25 soo

16*1/4 = 4, but there is a rule about whole numbers i think; or is it just decimals?

amistre64 · Answer

If L1 is a whole number, the lower quartile is midway between the L1-th value and the next one.

so its the average of the 4th and 5th spot

amistre64 · Answer

Q3 = P75 is prolly gonna get you the same results, meaning a whole number.

16*3/4 = 12; so its the averge of the 12th and 13th spots