Answer:
The right answer is:
(a) -10.67
(b) 0.7986
Step-by-step explanation:
(a)
According to the question,
<u>X P(X) X.P(X) X2.P(X)</u>
<u>12130 0.002 24.26 294274</u>
<u>-35 0.998 -34.93 1222.55</u>
Now,
or,
hence,
The mean will be:
(b)
According to the question,
n = 12
p = 0.125
q = 1 - p
= 0.875
Now,
⇒
By substituting the values, we get
⇒
⇒
⇒
⇒
⇒
He included another variable - time. He should have given both brands the same amount of time to work. The only variable should have been the brands. Parker has introduced another variable and therefore his results are invalid.
Answer:
-1
Step-by-step explanation:
Since 34 is an even number, we can factor a 2 out of the exponent of your problem, like this:
i34=(i2)17.
But, i2=-1, so your problem becomes:
-117.
This means, multiply -1 by itself 17 times, to get -1
(Remember, -1 raised to an odd power is always -1, so -117=-1.)
The final answer is:
i34=-1