Hello professionals,

Please help me solve this problem. step by step solution is required in order to learn how to do similar ones in the future

The following numbers represent the highest temperatures (in Fahrenheit) during the last 18 days of a city.

68, 75, 87 ,99, 72, 72, 65, 64, 61, 70, 77 ,70 ,67, 73, 83, 55, 58, 54

1. Calculate the mean, variance, and the standard deviation of the above data.
2. Calculate the first quartile, the third quartile, and the 90thInterpret these values.