Question

Hi there, can you guys teach me how to solve the second problem, please?

This problem uses the data file called "12thWomanStoresData."


Consider the variable Age.

1) What is the standard deviation of the age variable? 12.3890 years. (Round to 4 decimal places if necessary)

2) Now, supposed this variable was distributed normally. Between what two values would you expect to find 95% of the data observations? Answer: Between ... (on the low end) and ....... (on the high end). [Round to 1 decimal place if necessary]

I got some of number of data like mean: 43.08, standard dev: 12.389047, median 42, range 58, min 20 and max 78 Q1: 32 and Q3: 50. Thanks

Answer 1

Empirical rule is applied in question 2.

According to empirical rule 95% of the normally distributed data lies between $\mu-2 \sigma$ to $\mu+2 \sigma$ .

we have or gutes tion 2 leoni use empirica/九ule. According to empiviead xute 사+ 2 σ 1-5 for q51 da ta , we ill caleulate the valves of 18 3 (on e decimal place) : 61. as% of the data obselvations lies between 18.3 to 61.9