Answer:
False. See explanation below.
Step-by-step explanation:
False
A simple random sample "is a subset of a statistical population in which each member of the subset has an equal probability of being chosen"
In other words that means in order to apply a random sampling we need to ensure that we have the same probability of inclusion for every possible element of the population of interest.
And for this case a collection of any numerical information is not referred as random sampling since we don't know if these scores are representative of the population of interest.
And we don't know if this information is obtained using any sampling frame or sampling methodology.
Domain:
We know that domain is all possible values of x for which any function exists
or all possible values of x for which curve is defined
we can see that curve extended from left to right side
so, domain is all real numbers
Range:
We know that domain is all possible values of y for which x is defined
or all possible values of y for which curve is defined
we can see that lowest y-value is 0
and upper most value is inf
so, range is
so, option-D.............Answer
Answer: 9.30918
Step-by-step explanation:
desmos calculator will help you to get the answer, hover I graph it say (-4,-19) that the line get togther
Step-by-step explanation:
<h3>
Answer: 6/7</h3>
This approximates to roughly 6/7 = 0.8571
========================================================
Explanation:
Let's define the following
- A = number of people who passed the test, and did the hw
- B = number of people who passed the test, but didn't do the hw
- C = number of people who failed the test, but did the hw
- D = number of people who failed the test, and didn't do the hw
There are 30 students in the class total. This must mean A+B+C+D = 30.
We know that "There were 7 students who failed the test and also did not complete the assignment", meaning we can say D = 7.
We can also say A+B = 21 because this is the entire group of people who passed the test (whether they did the hw or not).
This means:
A+B+C+D = 30
(A+B)+C+D = 30
(21) + C + 7 = 30
C+28 = 30
C = 30-28
C = 2
We have 2 people who failed the test, but did the hw.
Because 20 students did the hw, we know that
A+C = 20
A+2 = 20
A = 20-2
A = 18
We have 18 students who passed the test and did the hw. This is out of 21 students who passed. From here on out, we only focus on this group of students because of the phrasing "given that they passed the test". This means we know 100% that whoever we picked, they passed the test.
The probability we're after is therefore:
18/21 = (3*6)/(3*7) = 6/7
Side note: It might help to sort the data into a table as shown below. Start with table 1, and the goal is to replace the placeholder letters with the proper numbers, to arrive at table 2. You'll have to use algebra as shown earlier to fill out the table.