For each pair of variables, decide whether there is: • a very weak or no relationship

• a strong relationship that is not a causal relationship

• a causal relationship


Explain your reasoning

1. number of snow plows owned by a city and mitten sales in the city

2. number of text messages sent per day by a person and number of shirts owned by the person

3. price of a pizza and number of calories in the pizza

4. amount of gas used on a trip and number of miles driven on the trip

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?

What numbers are included in the set of integers? what numbers are not included?

What is the circumference of a circle with an area of 50.24 cm²?