What is a median ,mode, range and iqr ?

Median - it represents the middle number in the data set.

Range - you have to find the lowest value and the highest value and get the final answer, same with the interquartile range, you just have to find the lower quartile and upper quartile and subtract it and you get the final answer in the following data set.

quit

step-by-step explanation:

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500