Answer:
no because it is just a straight line. a dot is plotted at (0,-3) and a straight line is horizontal.
ANSWER
The missing term is 42.
EXPLANATION.
We want to find the missing term of the equivalent ratio. 90:15=_____:7
Let y be the missing term, then
90:15=y:7
We rewrite as fractions to get;
Simplify the left ratio:
Cross multiply:
Therefore the missing term is 42.
Answer:
32/24
Step-by-step explanation:
16 times 2 is 32
Answer:m=-1
Step-by-step explanation:
M=-(4+m)+2
M=-4-m+2
m+m=-4+2
2m=-2
m=-1
Answer:
Step-by-step explanation:
The confidence interval for population mean is given by :-
, where n=sample size
= sample mean
=sample standard deviation
= critical t-value (for two tailed )
Let be the confidence interval for the population mean mercury concentration.
As per given , we have
Sample size : n= 28
degree of freedom = 27 [df=n-1]
Sample mean : cc/cubic meter
Sample standard deviation : s= 0.0036
Significance level :
Critical two-tailed test value :
(Using t-distribution table.)
We assume the population is approximately normal.
Now, the 98% confidence interval for the population mean mercury concentration will be :-
Required confidence interval :