Answer:
Step-by-step explanation:
Answer:
A. T > 2.539
Step-by-step explanation:
We have a hypothesis test of the mean, with unknown population standard deviation.
The hypothesis are:
From the hypothesis we can see that the test is right-tailed, so the critical value of t should be a positive value.
The degrees of freedom can be calculated as:
The significance level is 0.01, so the critical value tc should be the one that satisfies:
Looking up in a t-table, for 19 degrees of freedom, this critical value is tc=2.539.
(93+67+78+44+123)/5=405/5=81 pizzas per day on average
C is your answer.
B^n / b^m = b^(n - m)
4^5 / 4^2 = 4^(5 - 2) = 4^3
Answer:
i believe the answer would be B
Step-by-step explanation: