fir the x missing think is 11 and for the other f(×) is 24
Answer:
Option C.
Step-by-step explanation:
For a given set of N elements:
{x₁, x₂, ..., xₙ}
The mean is given by:
And the variance is given by:
Then for our set:
{70, 80 ,75, 75, 80}
We have 5 elements, then N = 5
The first thing we need to find is the mean.
Then the variance will be:
The correct option is C, 14.
We can not know because it only one number there
Answer:
1) Option C) Parameter
2) Option D) Statistic
Step-by-step explanation:
We are given the following statement n the question:
Phone-in poll conducted by a newspaper reported that 57% of those who called in liked ''real TV''.
The unknown true percentage of American citizens who like ''real TV'' is a parameter because here we talk about the whole population of Americans who like the real TV
- Parameters are numbers that summarize data for an entire population.
57% is the proportion of sample that is describing the sample of people who participated in the poll and liked real TV and thus, 57% is the statistic.
- A statistic is a characteristic of a sample. Generally, a statistic is used to estimate the value of a population parameter.
