Solution:
Standard Error Formula:
SEx̄ = S / UNDERROOT N
where,
SEx̄ = Standard Error of the Mean
s = Standard Deviation of the Mean
n = Number of Observations of the Sample
SExĚ„ = 51.60/ âš21 = 11.26004314
So, standard error = 11.26004314
Answer:
y=-2x+2
Step-by-step explanation:
The slope is -2x, meaning that the y-intercept can be found by working backwards from the given point. If the y value of the point is 4, subtracting 2 to get you to the point (0, 2) would provide the y-intercept.
Slope Intercept form is y=mx+b (m is the slope, x is the entered value, b is the y intercept)
<h2><u>
Answer with explanation</u>
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Let p be the population proportion of parents who had children in grades K-12 were satisfied with the quality of education the students receive.
Set of hypothesis :
Confidence interval for population proportion is given by :-
, where
n= sample size
= sample proportion
and is the two-tailed z-value for confidence level (c).
As per given ,
Sample size of parents : n= 1085
Number of parents indicated that they were satisfied= 466
Sample proportion :
Critical value for 90% confidence interval : ( by z-value table)
Now, the 90% confidence interval :
Thus , the 90% confidence interval: (0.4043, 0.4537).
Since 0.43 lies in 90% confidence interval , it means we do not have enough evidence to reject the null hypothesis .
i.e. We are have no evidence that parents' attitudes toward the quality of education have changed.
Step-by-step explanation:
Answer is 20% of 20 is 4
Answer is 50%of 40 is 20
Answer is 125% of 100 is 125
I hope it's helpful!
<span>-3 (4+3x)= -(3x - 48)
-12+9x = -3x+48
9x+3x = 48+12
12x = 60
x = 60/12
x = 5
So, your answer is 5</span>