please solve question 1 , 2 , 3 Correctly with setp by step explanation needed... THANK YOU!!! I WILL GIVE UPVOTE FOR YOUR DETAILED ANSWER....

le Find Mean , Standard Deviation , Variance , Coefficient of Variance Red Range , and Standard Error. Mean ( SEM ) . 165 90 135 125 105 135 (65 155 115 110 20 Calculate Median , Mode , Standard Deviation and Variance - Marks 5 10 15 20 25 30 35 us 50 Number of 20 43 75 76 72 45 9 8 Students 6 30 ) Define Standard Error Mean? Write Formuly , Properties , Advantages and Disadvantages of Standard Error Mean? Calculate Standard Error Mean ( SEM ) of following data , 20-25 25-30 35-40 Claes interval | 0-5 5-10 10- 15 15- 20 30-35 Frequency 12 to 22 25 25 22 10 2 CS Scanned with CamScanner