Year 11 General Maths - Chapter 7 Test 1 - Bivariate Data

Height (tall, average short) and weight (heavy average, light)

Political affiliation (Labor, Liberal, Other) and years of education.

Age in years and weight in kg

Height in cm and gender (male, female).

Score out of 50 on a test for a group of males and a group of females

There is no association between the variables

There is a weak positive association between the variables

There is a weak negative association between the variables.

There is a strong positive association between the variables

There is a strong negative association between the variables.

weak negative

weak positive

moderate negative

strong negative

no relationship

the level of carbon monoxide emissions in a city will increase if the traffic congestion in a city is increased

the level of carbon monoxide emissions in a city will decrease if the traffic congestion is increased

cities with a high level of carbon monoxide emissions tend to have high traffic congestion

cities with a high level of carbon monoxide emissions tend to have low levels of traffic congestion

increasing the carbon emissions in a city will increase the traffic congestion

The y-intercept = 0 and the slope = 3.

The y-intercept = –10 and the slope = 3.

The y-intercept = 3 and the slope = –10.

The y-intercept = –10 and the slope = –3.

The y-intercept = 10 and the slope = 3.

$y=–1.3+1.1x$

$x=–1.3+1.1y$

$y=1.1–1.3x$

$y=1.1+0.9x$

$y=0.9+1.1x$

$50

$70

$150

$170

$210

On average, for each extra hour spent shopping an extra $50 is spent

On average, for each extra 50 minutes spent shopping an extra $1 is spent.

On average, customers spend $20 per hour at the shopping centre.

On average, customers spend $50 at the shopping centre.

On average, customers will spend more per hour the longer they stay at the shopping centre

one variable is numerical and the other is nominal.

both variables are categorical

both variables are numerical and the association is linear. 

one variable is numerical and the other ordinal. 

none of the above. 

Cost of production increases at a rate of $12 000 per unit. 

Cost of production increases at a rate of $N per unit. 

Cost of production increases at a rate of $35 per unit. 

Cost of production is fixed at $12 000. 

Cost of production decreases as the number of units produced increases