Answer:
-15,-8
Step-by-step explanation:
I counted from 7 to -8, so that was -15.Then counted from 8 to 0, and that was -8. So that's how I got my answer!!
Answer:
2,820 m
Step-by-step explanation:
Given that the rectangular piece of land measures 250m by 220 m, the perimeter of the rectangle gives the length of wire required to fence it once.
The perimeter p of a rectangle of length l and width b is given as
p = 2(l + b)
Hence p = 2( 250 + 220)
= 2 * 470
= 940 m
Since each side is to be fenced with 3 rows of wires, the length of wire required
= 3 * 940m
= 2,820 m
Using the <em>normal distribution and the central limit theorem</em>, it is found that there is a:
a) 0.1813 = 18.13% probability that a person selected at random will score between 240 and 270 on the test.
b) 0.4501 = 45.01% probability that the mean score for the sample will be between 240 and 270.
<h3>Normal Probability Distribution</h3>
In a normal distribution with mean 
and standard deviation 
, the z-score of a measure X is given by:
- It measures how many standard deviations the measure is from the mean.
- After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.
- By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation
.
In this problem:
- The mean is of
.
- The standard deviation is of
.
Item a:
The probability is the <u>p-value of Z when X = 270 subtracted by the p-value of Z when X = 240</u>, hence:
X = 270:
has a p-value of 0.6217.
X = 240:
has a p-value of 0.4404.
0.6217 - 0.4404 = 0.1813.
0.1813 = 18.13% probability that a person selected at random will score between 240 and 270 on the test.
Item b:
We have a sample of 7, hence:
X = 270:
By the Central Limit Theorem
has a p-value of 0.7910.
X = 240:
has a p-value of 0.3409.
0.7910 - 0.3409 = 0.4501.
0.4501 = 45.01% probability that the mean score for the sample will be between 240 and 270.
To learn more about the <em>normal distribution and the central limit theorem</em>, you can check brainly.com/question/24663213
Complete Question:
Which of the following is true of qualitative research methods?
A. Qualitative data may be analyzed qualitatively or quantitatively.
B. Qualitative researchers must be able to translate numerical data into meaningful narrative information.
C. Qualitative researchers seek to fit their answers into predetermined categories rather than to understand research participants.
D. Qualitative research is less superior for studying topics that involve complex psychological motivations.
E. Qualitative researchers emphasize their samples are made up of representative rather than relevant consumers.
Answer:
A. Qualitative data may be analyzed qualitatively or quantitatively.
Step-by-step explanation:
Qualitative data research is a way or method to gather or collect non-numerical information either by observation or by asking crucial questions. It is a scientific method.
Qualitative data research involves the gathering accurate data and one of the way to do this is by carrying out surveys.
Qualitative data research determines WHY a particular action is carried out.
There are various methods of Qualitative data research. They are:
a. Direct Observation
b. In-depth interviews
c. Focus groups
d. Open end surveys
e. Oral History
f. Ethnographic observation
Qualitative data may be analysed qualitatively or quantitatively.
His friends ate 1/2 of 3/4..." of " means multiply
1/2 * 3/4 = 3/8
so his friends ate 3/8 of the bag of popcorn
