Answer:
D. decrease in the price of MP3 players
Explanation:
The above is the correct answer.
"Ceteris paribus" is a Latin phrase which means "all else being equal". The decrease in the price of MP3 players is the changes that does NOT violate ceteris paribus.
The selected option is talking about MP3 player. The MP3 player doesn't fit into the demand for CD players. It is the odd there which doesn't violate.
Option D is the correct answer.
Answer: There is a weak, positive correlation between the weight Lucy lost and the number of weeks.
Explanation:
The correlation coefficient is used to measure the relationship between two variables in terms of how they move in relation to one another.
If two variables are said to have a positive correlation, it means that they increase at the same time and decrease at the same time for example, there is a positive correlation between the amount of food a family buys and how much money they have because the more money they have, the more food they buy.
Negative correlations are the reverse for instance Ice cream sales and cold temperatures. The colder it is, the less people buy ice cream.
The Correlation coefficient ranges from -1 to +1 with +1 (-1) meaning that the variables are perfectly positively(negatively) correlated. The closer the value is to 0, the weaker the correlation.
Generally, for a correlation coefficient between the numbers 0 and +0.3, there is a weak positive correlation.
With a correlation coefficient of 0.0502, there is therefore a weak, positive correlation between the weight Lucy lost and the number of weeks.
