Answer:
a: no the sample size is too small
b: Yes, the distribution is normal with a mean of 40 and standard deviation of 12
Step-by-step explanation:
a: If n < 30, we need to know that the sample is normally distributed or else we can't determine anything. When sample sized get very large, they usually resemble normally distributed data sets so we can still make conjectures even if the data isn't officially normally distributed
b: The question tells us that the sample is normally distributed, so even though n < 30, we can still make conjectures about the population
Answer:
612
Step-by-step explanation:
Since Kelly had already 474 dollars in her checking account and added 138 more, 474+138=612
D is a function because there are no repeated x values
for example b is not a function because we have (0,-7) and (0,-9)
What its saying is that u have a discount price and that goes up by 8% so we know its not greater than 1
D^2 - 4d = 3d
d^2 - 7d = 0
d(d - 7) = 0
d = 0 or d - 7 = 0
d = 0 or d = 7
