Statistics

Variable	N	N*	Mean	SE Mean	StDev	Minimum	Q1	Median	Q3	Maximum
Weight	201	0	52.01	1.13	15.96	29.20	40.90	49.10	58.30	123.80

1. Calculate the unbiased estimate for the mean (in kg) using sample data. Answer: 52.01
2. Calculate the unbiased estimate for the standard deviation (in kg) using sample data. Answer: 15.96
3. Given the proposed guideline for the maximum dosage in a 24-hour period for the new drug, the cutoff weight, in kilograms, necessary to avoid experiencing adverse symptoms is as follows. Minimum weight= 35kg, maximum weight= 90kg Assuming that your unbiased estimates for the population mean and standard deviation are accurate, calculate thez-scorefor this cutoff weight.
4. Assuming that the population of weights of 12-year-old children in the US is normally distributed, use yourz-scorefrom the previous question to estimate the following. Estimate the proportion of 12-year-old children who would exceed125 mgof drug/kg of body weight when taking the maximum dose. Use maximum weight as a reference point for maximum dose.
5. There are approximately four million 12-year-olds in the US. Approximately how many of them would be at risk of experiencing adverse symptoms if they took the max dose of the new drug?

I am given a data:

https://www.webassign.net/clstatsup1/weights.csv

IF YOU CAN PLEASE HELP ME!