An insurance company is interested in a statistical profile of the age its clients in a particular geographic region. They provide you with grouped data on all (i.e. the population) of their clients in that region

Age Number

Less than 25 years old 20

25 years old to 34.99 years old 40

35 years old to 49.99 years old 50

50 years old to 64.99 years old 50

65 plus years old 30

Required

1. Calculate the mean age of the company’s clients in this region

2. Calculate the median age of the company’s clients in this region

3. Calculate the variance and standard deviation of the clients’ age in this region

4. Calculate the 25th and 75th percentile of the clients’ age.

please note that the class interval is unequal.

an early assistance would be very much appreciated....