Help me solve the below question

#1
The following set of data represents the age in years of newly married ladies in Northern North. 15, 18, 17, 16, 14, 15, 9, 15, 13, 12. This data was collected after a tourist made a report that ladies in this place get married at an age less than 18 years as is required by law. Does this data provide enoughevidencetobelievethatthemeanageofladiesgettingmarriedinNorthernNorthisactually less than 18 years as reported by the tourist? Show your working clearly.
 
#3
Does this data provide enoughevidencetobelievethat
No, there need to be evidence that the sample was a random sample (a probability sample) from the population of interest. It is not enough to just show some numbers. Even if you had shown your computations clearly.
 

obh

Active Member
#4
Under the assumption that it was a random sample ...

I assume you can't really know from such a small sample that the population distribution is really normal. (the power of normality tests is probably low)

I assume it is safer to use the Mann-Whitney U test in this case.