Answer:
Test is Left tailed test
Parameter tested is standard deviation
Step-by-step explanation:
We are given the hypothesis as;
Null hypothesis; H0: σ = 8.6
Alternative hypothesis; H1: σ < 8.6
Where;σ is a constant generally known in statistics as the standard deviation.
Now, it's the alternative hypothesis that will let us know whether this is left tailed, right tailed or two tailed.
Alternative hypothesis says σ < 8.6.
This means that the values of σ that satisfy this hypothesis are less than 8.6 and thus are on the left hand side of 8.6 on a number line. Thus, the shaded region in a normal distribution curve will be on the left.
Thus, it's a left tailed test
Answer:
15
Step-by-step explanation:
Scientific notation is of the form a 
Number written by Jim = 543000000000000
To find a, take the number and move a decimal place to the right one position.
Number given = 543000000000000
New number = 5.43000000000000
So decimal will be after 5.
Now to find b, count the number of decimals shifted from right to left.
b= 14
So scientific number of 543000000000000 = 
So option A is the answer
Answer: Hope someone gonna answer soon....
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
4^2= 16
16+7=23
23-3=20
