Answer: Sample statistics are used to make inferences about population parameters.
Step-by-step explanation:
A number which describes a population is called a parameter, such as a proportion or percentage.
A statistic is a number which may be calculated from the data observed in a random sample without demanding the use of any unknown parameters.
The mean and variance of a population are population parameters.
Thus, fourth statement is the right answer "Sample statistics are used to make inferences about population parameters."
Answer:
t = 9 s
Step-by-step explanation:
A stone is thrown downward with an intitial velocity of 29.5 m/sec will travel a distance of a meters, where
We need to find when the stone will hit the ground. It means when s(t) = 0. So,
So, the stone will take 9 seconds to hit the ground. Hence, this is the required solution.
Answer:
Step-by-step explanation:
Let (2n-1) and (2n+1) be the consecutive, odd numbers.
(2n-1)(2n+1) = 143
4n² - 1 = 143
4n² = 144
n² = 36
n = 6
2n-1 = 11
2n+1 = 13
The numbers are 11 and 13.
Answer:
<h2>
<em>angle</em><em> </em><em>of</em><em> </em><em>1</em><em> </em><em>will</em><em> </em><em>be</em><em> </em><em>6</em><em>0</em><em>°</em></h2>
Step-by-step explanation:
<h2 /><h2>
we know vertical opposite angle are equall so </h2><h2>
<em>angle</em><em> </em><em>1</em><em> </em><em>=</em><em> </em><em>6</em><em>0</em><em>°</em></h2>
