stats

Week 3 Homework

IQO

The Highway Loss Data Institute routinely collects data on collision coverage claims. Collision coverage claims insures against physical damage to an insured individual’s vehicle. The data represents random collision coverage claims based on data obtained from the Highway Loss Data Institute for 2007 models. Find and interpret the first, second, and third quartiles for collision coverage claims.

$6751	$9908	$3461	$21,147	$2332	$2336
$189	$1185	$370	$1414	$4668	$1953
$10,034	$735	$802	$618	$180	$1657

Quartile 1: _____

Quartile 2: _____

Quartile 3: _____

Interpretation (Explain):

Chi Square

Domestic violence incidents are not rare and may cause marriages to end. Happiness in relationships may be a key ingredient to mitigating DV. Is there a relationship between marriage and happiness? The data shows the marital and happiness of individuals who participated in the General Social Survey. Complete the expected counts within each cell, and make a decision. Test whether marital status and happiness are independent at the 95% level of significance.

			Marital	Status
		Married	Widowed	Divorced/ Separated	Never Married	Total
	Very happy	600	63	112	144
Happiness	Pretty happy	720	142	355	459
	Not to happy	93	51	119	127
Total

Chi Square

Starting July 1, 2013, MOC will be a smoke free campus. The following data represents the smoking status by level of education for residents of the United States 18 years or older from a random sample of 11054 residents.

Test whether smoking status and level of education are independent at the 95% level of significance.

Construct a distribution of smoking status by number of years of education using a bar chart. Does this evidence support your conclusion?

Number of years of Education		Smoking	Status	Total
	Current	Former	Never
<12	178	88	208
12	137	69	143
13-15	44	25	44
16 or more	34	33	51
Total