Answer: -1.5
Step-by-step explanation:
When population standard deviation is known, then the formula to find the z-test statistic for population mean is given by :-
, where n= Sample size.
= Population mean
= Sample mean
= Population standard deviation.
As per given , we have 
(average infants contracted typhoid each month)
n= 4 (No. of months)
Then , the value of the appropriate test statistic will be :
Hence, the value of the test statistic = -1.5
whats the book name i need the book name I'm going to guess its pearson idont k-now why but its familiar the entire books online just search github
Answer:
3 hours and 12 minutes
Step-by-step explanation:
8.96 ÷ 2.8= 3.2
I know that 2/10 of 60 is 12
3.2= 3hrs & 12 mins
Answer:
6 and -6 are solutions because any negative multiplied by a negative is a positive. The negatives cancel each other out but this only works for multiplication from what I know.
Step-by-step explanation:
6 x 6 = 36
-6 x -6 = 36
Answer:
34/39
Step-by-step explanation:
scale factor = new length / old length
34's factors are 1, 2, 17, 34
39's factors are 1, 3, 13, 39
no common factors bigger than 1 so cannot simplify
