Then the square root of 64=8. 8*8=64
Answer:
The sample size used to compute the 95% confidence interval is 1066.
Step-by-step explanation:
The (1 - <em>α</em>)% confidence interval for population proportion is:
The 95% confidence interval for proportion of the bank's customers who also have accounts at one or more other banks is (0.45, 0.51).
To compute the sample size used we first need to compute the sample proportion value.
The value of sample proportion is:
Now compute the value of margin of error as follows:
The critical value of <em>z</em> for 95% confidence level is:
Compute the value of sample size as follows:
Thus, the sample size used to compute the 95% confidence interval is 1066.
Y would equal -28 when X equals 20.
Since they vary directly, all you do is divide 20 by -5 to find the variation between X and Y. You will get -4 which you multiply to 7, to get you final answer. Thus making Y equal to -28.
I hope this helps!
In the equation 50/3=75/x
multiplying both sides by x we get:
50x/3=75
multiplying both sides by 3 we get
50x=225
this implies that the mistake that Joanie made was that she forgot to multiply 75 by 3.
thus
50x≠75.