Answer:
C. A matched pairs tt-interval for a mean difference
Step-by-step explanation:
When the observations from two samples are paired either naturally or by design we find the difference between the two observations of each pair. Treating the differences as a random sample from a normal population with mean ud= u1-u2 and unknown standard deviation , we perform one sample t- test on them . This is called paired difference or a paired or a matched t- test.
The test statistic
t= d`/sd/√n
where d`= ∑ di/n
and sd= ∑ (di- d`)²/n-1
with υ= n-1 degrees of freedom.
For example suppose 10 young recruits are given a strenuous physical training programme by Army. Their weights are recorded before they begin and after they complete they complete the training. The two observations obtained for each recruit. i.e. before and after measurements constitute natural pairing.
D. 140 cm, because 5 x 4=20 and 20 x 7 is 140.
So first add them al together
10+14+40=64
16 ounces=1 pound
1pound/16ounce=1 because they are equal
so then multiply 64 ounce by 1 or 1pound/16ounce to cancel units and get
64 pound/16=4 pound
4 pounds total
Answer:
it is the third one Two events are dependent if the outcome of the first event does not affect the outcome of the second ev
Step-by-step explanation: