Unlike scientists or statisticians, economists often break the range of a random variable into five parts, or quintiles. For a standard normal distribution, what is the z-score that defines the second quintile, the 40% point? (a) 0.40 (b) -0.40 (c) 0.253 (d) -0.253 (e) -0.842

(d) -0.253

Step-by-step explanation:

According to a z-score table for a standard normal distribution, a z-score of -0.25 corresponds to the 40.13th percentile, and a z-score of -0.26 corresponds to the 39.74th percentile.

Interpolating those values gives us the z-score for the 40th percentile. The 40.13th percentile is twice as close to the 40th percentile than the 39.74th, thus:

The answer is (d) -0.253.

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.

20%

step-by-step explanation: