Suppose You Wanted to Determine If You Should Reject the Null

question 21

Multiple Choice

Suppose you wanted to determine if you should reject the null hypothesis that running a playing fast tempo (as opposed to slow) music in your store decreases sales by $100 on average. On 65 randomly selected days with fast tempo music on the average store sales is $2,345 with a sample standard deviation of 45, while on 75 randomly selected days with slow tempo music on the average store sales is $2,555, with a sample standard deviation of 65. What would be the proper t-stat for this hypothesis test?

• A) \(\frac { 2345 - 2555 } { \sqrt { \frac { 45 ^ { 2 } } { 65 } + \frac { 65 ^ { 2 } } { 75 } } }\)
• B) \(\frac { 2345 - 2555 - 100 } { \sqrt { \frac { 45 ^ { 2 } } { 65 } + \frac { 65 ^ { 2 } } { 75 } } }\)
• C) \(\frac { 2345 - 2555 + 100 } { \sqrt { \frac { 45 ^ { 2 } } { 65 } + \frac { 65 ^ { 2 } } { 75 } } }\)
• D) \(\frac { 2345 - 2555 } { \sqrt { 45 ^ { 2 } + 65 ^ { 2 } } }\)

---

Definitions:

Consolidation

Consolidation refers to the process of making a position of power or achievement secure and stable, or in psychology, the process by which memories become stable in the brain.

Dissenting View

An opinion that differs from the consensus or majority viewpoint, highlighting the presence of diverse perspectives in discussions or debates.

Informational Influence

A form of social influence where an individual changes their behavior or beliefs based on information received from others.

Normative Influence

The influence of other people that leads us to conform in order to be liked and accepted by them.