Answer:
23
Step-by-step explanation:
Given,
x = 3 + bị
Again,
x ÷ 2 = 13
Multiplying both the sides by 2, we can get.
(x ÷ 2) × 2 = 13 × 2
or, x = 26
As we find the value of x, we can now complete the complex number which is b.
x = 3 + bị
Putting the value of x, we can get,
26 = 3 + bi
or bi = 26 - 3
or, b = 23.
Therefore, the possible value of b = 23.
Answer:
I really don't know that is hard
Step-by-step explanation:
don't know that one
Answer:
And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence
Step-by-step explanation:
Information given
represent the sample mean
population mean
s= 5.2 represent the sample standard deviation
n=59 represent the sample size
Confidence interval
The confidence interval for the true mean is given by the following formula:
(1)
The degrees of freedom are given by:
The Confidence interval is 0.90 or 90%, the significance is
and
, and the critical value is
Now we have everything in order to replace into formula (1):
And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence