Answer :
Answer:
There is not enough information to answer this question.
We need to conduct a hypothesis in order to check if the mean for the new year is higher than the mean before, the system of hypothesis would be:
Null hypothesis:[tex]\mu_{A} \leq \mu_{B}[/tex]
Alternative hypothesis:[tex]\mu_{A} > \mu_{B}[/tex]
But as we can see we don't have the sample deviations or sample sizes provided, so for this case we don't have enough info to conclude if we have a significant increase on the mean.
Step-by-step explanation:
There is not enough information to answer this question.
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to check if the mean for the new year is higher than the mean before, the system of hypothesis would be:
Null hypothesis:[tex]\mu_{A} \leq \mu_{B}[/tex]
Alternative hypothesis:[tex]\mu_{A} > \mu_{B}[/tex]
We don't know information about the population deviations, so for this case is better apply a t test to compare means, and the statistic is given by:
[tex]t=\frac{\bar X_{A}-\bar X_{B}}{\sqrt{\frac{s^2_{A}}{n_{A}}+\frac{s^2_{B}}{n_{B}}}}[/tex] (1)
But as we can see we don't have the sample deviations or sample sizes provided, so for this case we don't have enough info to conclude if we have a significant increase on the mean.