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
Answer:
angle E
Step-by-step explanation:
YOYOU CAN CUT BOTH OF THEM AND PLACE IT IN TOP OF EACH OTHER
Answer: -8/3
Step-by-step explanation:
Multiplying a positive and a negative equals negative: (+)•(-)=(-)
y= - 2/3•4
Y= -8/3
add the total time = 3+1 = 4 hours
add total miles = 100+49 = 149
divide 149 by 4= 149/4 = 37.25 miles per hour average
Answer:MARK BRAINLLEST MARK BRAINLLEST
(−5/2, 5/2√3)
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Step-by-step explanation:
