What are more appropriate measures of center and spread for a data set ? select two choices: one for the center and one for the center. a: better measure of center: mean b: better measure of spread : interquartile (iqr ) c: better measure of center : median d: better measure of spread: standard deviation

Median and IQR

Step-by-step explanation:

Out of 3 central tendencies, mean, median and mode, median is the better measure.

This is due to

i) Mean is affected by extreme values

ii) Mean is not correct if more outliers are present

iii) Mean may not represent the nature of the data whether skewed right or left.

But median the middle entry is not affected by extreme items or outliers so median is better than mean,

For measure of spread, IQR is better since extreme items will show higher std deviation, and also some outliers mislead.  But IQR gives a good idea.

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.