Suppose you are interested in determining if the average amount of money that students spend on food at your university per day is greater than $30. You randomly choose 25 students from your campus and calculate that the mean amount of money spent per day is $18.01 with a standard deviation of $2.22. Would you use a one-sided or two-sided test for this problem?

One-sided test

Step-by-step explanation:

In this problem, since we are only interested in knowing if the mean is greater than $30, a one sided test should be used to calculate, at the desired significance level, if the z-score for the measured mean is greater than the z-score equivalent to spending $30. A two-sided test should be used if we wanted to determine if the mean amount spent was within an interval, like $20 and $30 for instance.

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752