Author:
Christine Farr

Week 5 – 201630_QNTP-5000-WB1_32917

Compute the appropriate descriptive statistics (including the standard error where applicable) for each of the variables and then answer the questions. Based on the data presented in the file "Happines data.xlsx".

The standard error for the variable "Happy" is:

The mean and standard error for the proportion of countries with a Low risk are:

If the Economic Freedom scale is constructed in such a way that the population mean and standard deviation are 50 amd 15 respectively, based on the sample data, the 90% lower confidence level of the sample mean is?

The 95% confidence interval estimate for sample means of the variable "Life" is:

The 90% confidence interval for the proportion of countries with High risk rating is:

The proportion of females in the population of the various coutries was not collected for this sample and is unknown. What would be a conservative estimate of the margin of error at a 95% confidence level for a sample of this size?

Based on surveys conducted in previous years, it is known that the standard deviation of the measure of Happiness is 1.00. What sample size for any country would be necessary in order to measure the mean Happines with a margin of error of 0.1 at a 95% confidence level?

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