Policy Analysis
Repeat the exercise for Day 10 and write a policy brief this time.
Decision Analysis & Modeling

Refer to this sheet to understand standard notations used in hypothesis tests.

What is the difference between parameter and statistic?

The mean weight of 11 year olds in the US was found out to be 43 kg in 2013. Some scientists fear that unhealthy dietary habits have increased the mean weight. They take a sample of 100 eleven year olds and find the mean weight to be 46 kg with a standard deviation of 7 kg. Scientists want to find out whether the children across the nation have become heavier in general. Write the null and alternate hypothesis for the statistical test in this situation.