Given:
savings 12% of her salary.
savings $4,200
This year's salary: x + 3,000
Last year's salary: x
4,200 represents 12% of her salary.
4,200 / 12% = 35,000 is her salary this year.
x + 3,000 = 35,000
x = 35,000 - 3,000
x = 32,000 her salary last year.
Answer: a) 0.68, 0.1043, b) 0.68, 0.066
Step-by-step explanation:
Since we have given that
p = 0.68
n= 20
Expected value = 0.68
So, Standard error would be
if n = 50
Expected value = 0.68
So, Standard error would be
In both the cases,
Yes it is appropriate to use the normal distribution for expected value and standard error.
Answer:
(- 9, - 9)
Step-by-step explanation:
Given the 2 equations
3x - 4y = 9 → (1)
- 3x + 2y = 9 → (2)
Adding (1) and (2) will eliminate the term in x
(1) + (2) term by term
(3x - 3x) + (- 4y + 2y) = (9 + 9)
0 - 2y = 18
- 2y = 18 ( divide both sides by - 2 )
y = - 9
Substitute y = - 9 into (1) or (2) and evaluate for x
(1) → 3x + 36 = 9 ( subtract 36 from both sides )
3x = - 27 ( divide both sides by 3 )
x = - 9
Solution is (- 9, - 9)
Shrafhhhds is the purpose of the expression of the social studies of the social and social studies
Answer:
The survey option that will give cafeteria the valid result is Survey Questionnaire
Step-by-step explanation:
A survey questionnaire is the type of research methods in which the researchers get information from the respondents by giving him/her a set of questions to provide answers.
Example:
Which food will you like the school to add to the cafeteria menu
( ) Bread
( ) Fried Rice
( ) Chicken Rib
Which do you enjoy most at home?
( ) Toast Bread
( ) Beans porridge
( ) Spaghetti
Advantage of Survey questionnaire or why it will bring a valid result
1. From the example above, the options to the questions asked helps the respondents to give answer relevants to the question in the survey.
2. It is easier to analyze
3. The subjects or sample can easily be captured.
4. They are simple to administer
5. The format is familiar to the respondents
6. It allows for a pilot study questionnaire easily, where by the researcher can check if the respondents understand the terminologies in the survey or not.
