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QveST [7]
3 years ago
7

In a survey which uses lay interviewers to interview one person about his or her health and the health of household members, the

sources of error include:
a. the person with disease has had no symptoms and is not aware of the disease.
b. the respondent provides the information but the interviewer doesn’t record it or records it incorrectly.
c. the interviewer doesn’t ask the questions that he or she is instructed to ask, or asks them incorrectly.
d. the person has had symptoms and has had medical attention but does not know the name of the disease.
e. all of the above
Mathematics
1 answer:
ELEN [110]3 years ago
6 0

Answer:

Correct answer is (e) all of the above.

step-by-step explanation:

As for the option (a) and (d), you can't give information you don't have. When you are not aware of the diseases, you can not give information about it.

For option (b), when the interviewer did not record the information or record it incorrect, it can not be used for survey.

For option (c), when correct questions are not asked, you can't required answers for the survey.

Summation of the above will be sources of error for the survey.

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A tree planted today has a height of 5 feet and grows one foot each month.
sammy [17]

Answer:

Liner function

x = 5 + n

Step-by-step explanation:

Given:

Height of tree = 5 ft

Grow per month = 1 ft

Find:

Equation:

Computation:

Assume;

New height of tree x

Number of month = n

x = 5 + 1(n)

x = 5 + n

3 0
3 years ago
-7q + 12r = 3q - 4r what dose r equal
Elanso [62]

Answer:

r = 5y/8

Step-by-step explanation:

isolate the variable by dividing each side by factors that contain the variable.

6 0
3 years ago
Prove or disprove (from i=0 to n) sum([2i]^4) <= (4n)^4. If true use induction, else give the smallest value of n that it doe
ddd [48]

Answer:

The statement is true for every n between 0 and 77 and it is false for n\geq 78

Step-by-step explanation:

First, observe that, for n=0 and n=1 the statement is true:

For n=0: \sum^{n}_{i=0} (2i)^4=0 \leq 0=(4n)^4

For n=1: \sum^{n}_{i=0} (2i)^4=16 \leq 256=(4n)^4

From this point we will assume that n\geq 2

As we can see, \sum^{n}_{i=0} (2i)^4=\sum^{n}_{i=0} 16i^4=16\sum^{n}_{i=0} i^4 and (4n)^4=256n^4. Then,

\sum^{n}_{i=0} (2i)^4 \leq(4n)^4 \iff \sum^{n}_{i=0} i^4 \leq 16n^4

Now, we will use the formula for the sum of the first 4th powers:

\sum^{n}_{i=0} i^4=\frac{n^5}{5} +\frac{n^4}{2} +\frac{n^3}{3}-\frac{n}{30}=\frac{6n^5+15n^4+10n^3-n}{30}

Therefore:

\sum^{n}_{i=0} i^4 \leq 16n^4 \iff \frac{6n^5+15n^4+10n^3-n}{30} \leq 16n^4 \\\\ \iff 6n^5+10n^3-n \leq 465n^4 \iff 465n^4-6n^5-10n^3+n\geq 0

and, because n \geq 0,

465n^4-6n^5-10n^3+n\geq 0 \iff n(465n^3-6n^4-10n^2+1)\geq 0 \\\iff 465n^3-6n^4-10n^2+1\geq 0 \iff 465n^3-6n^4-10n^2\geq -1\\\iff n^2(465n-6n^2-10)\geq -1

Observe that, because n \geq 2 and is an integer,

n^2(465n-6n^2-10)\geq -1 \iff 465n-6n^2-10 \geq 0 \iff n(465-6n) \geq 10\\\iff 465-6n \geq 0 \iff n \leq \frac{465}{6}=\frac{155}{2}=77.5

In concusion, the statement is true if and only if n is a non negative integer such that n\leq 77

So, 78 is the smallest value of n that does not satisfy the inequality.

Note: If you compute  (4n)^4- \sum^{n}_{i=0} (2i)^4 for 77 and 78 you will obtain:

(4n)^4- \sum^{n}_{i=0} (2i)^4=53810064

(4n)^4- \sum^{n}_{i=0} (2i)^4=-61754992

7 0
4 years ago
Find the x & y-intercepts of the function. f(x)=2(x−1)(x+2)(x−3)
ArbitrLikvidat [17]

Answer:

its in the image below because im too lazy to write it down.

Step-by-step explanation:

8 0
3 years ago
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What is the next term of the arithmetic sequence?<br> 6,2, -2, -6,
marissa [1.9K]

Answer:

-10

Step-by-step explanation:

-4 between each number

3 0
4 years ago
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