Average daily Back-To-School sales totaled $3,792 during July and August, 2022. The manager introduced a new marketing plan for 2023. A random sample of twenty days during July and August, 2023 thus far has revealed average daily sales of $3,927 where the population standard deviation = 274. Demonstrate whether there is sufficient evidence to support the conclusion Back-To-School sales have increased during 2023 over the 2022 level at the .05 level of significance