Answer:
The student who weighted the rock 5 times has a 95% confidence interval of (25.2, 29.1) which is guaranteed to be more wider (less precise) than the other student who weighted the rock 20 times.
Step-by-step explanation:
What is Confidence Interval?
The confidence interval represents an interval that we can guarantee that the target variable will be within this interval for a given confidence level.
The confidence interval is given by
Where is the mean weight is the standard deviation is the critical value from t-table and n is the sample size.
The term is known as margin of error.
As the sample size is decreased the corresponding margin of error increases which results in wider confidence interval which means smaller precision.
The student who weighted the rock 5 times has a 95% confidence interval of (25.2, 29.1) which is guaranteed to be more wider (less precise) than the other student who weighted the rock 20 times.
We can say with 95% confidence that the true mean weight of the rock is within the interval of (25.2, 29.1).
Answer:
6x^2 -4x +8
Step-by-step explanation:
(6x^2 + 5) - (4x - 3)
Distribute the negative sign
(6x^2 + 5) - 4x + 3
Combine like terms
6x^2 -4x +5+3
6x^2 -4x +8
Answer:
1/3 is the simplified form for given expression.
Step-by-step explanation:
Given that:
=
By simplifying:
Radical sign will be removed as follows:
=
For removing the "-" sign from power, base will be inverted:
=
27 can also be written as 3 * 3 * 3 = 3^3
So,
=
=
By simplifying we get:
= 1/3
i hope it will help you!
X=2 and y= 3 or (x,y) = (2,3)
hope this helps
Answer: Third option is correct.
Step-by-step explanation:
Since the complete circle is in blue region,.
And we have to throw a dart into the circle.
Its probability will be 1 .
So, It is likely.as the whole circle is blue .
so, there is no chance to go outside the blue region.
Therefore, it is likelihood that the dart will land into the blue region.
Hence, Third option is correct.