68921 im not sure if this is right but please let me know thanks
A confidence interval for the true mean SAT score of the graduating high school seniors will be (496; 536)
<h3>What is a confidence interval?</h3>
A confidence interval (CI) is a range of estimates for an unknown parameter in frequentist statistics.
Mean score ± margin of error
Margin of Error = 20
Mean SAT score = 516
Hence,the confidence interval will be:-
= 516 ± 20
Lower boundary = 516 - 20 = 496
Upper boundary = 516 + 20 = 536
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Answer:
1.14
Step-by-step explanation:
Start=12.00
Change= 8.57
Finish= 3.43 ( 12.00-8.57)
Divide finish by 3 3.43/3= 1.14
there will be a remainder of 1 cent unless you wanna be technical it wold be
1.14333333333
Answer:
Step-by-step explanation:
x=−10, y=−3
x=10, y=7
y=7,x=10
y=−3,x=−10
Answer:
Part 67)
and 
Part 68)
or 
Step-by-step explanation:
Part 67) we know that
The solution of the number line is the interval -------> (-2,3)
All real numbers greater than -2 and less than 3
so
The compound inequality could be
and 
"And” indicates that, both statements must be true at the same time
Part 68) we know that
The solution of the number line is the interval (-∞,-1] ∪ [1,∞)
All real numbers less than or equal to -1 or all real numbers greater than or equal to 1
The compound inequality could be
or 
"Or” indicates that, as long as either statement is true, the entire compound sentence is true