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DIA [1.3K]
3 years ago
10

It is clear that a large survey is an appropriate method for a study of marriage patterns among college students. What will the

researcher need to do to insure that the research sample is random?
Mathematics
1 answer:
Ulleksa [173]3 years ago
7 0

Answer:

Here the sample is the college students, and the researcher want's to do a survey to obtain information about marriage patterns.

Then, the ideal sample will be constituted of students of both genders, of different ideologies, of different social classes, of different religions, etc.

Then the thing that the researcher needs to do is:  

Define the size of the sample

Assign to each student a unique number.

using a random number generator,  generate enough different numbers to fill the sample.

Each of these numbers corresponds to a unique student, so now you have a complete sample of random selected students.

This sample can not be biased in any way.

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Studentka2010 [4]
9982 is the correct answer
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3 years ago
Assume a healthy heart beats exactly 70 times per minute. If an individual lives to age 85 years, estimate the number of heartbe
den301095 [7]

Answer:

3.12732 × 10⁹ beats

Step-by-step explanation:

Given that, in 1 min, the heart of an individual makes 70 beats, the number of beats the heart of the healthy individual makes in 85 years can be calculated as follows:

1 yr = 365 days, therefore,

85yrs = 85*365 = 31,025 days

1 day = 24 hours

31,025 days = 31,025*24 = 744,600 hours.

1 hr = 60 mins

744,600 hours = 744,600*60 = 44,676,000 mins

This means the individual lived for 44,676,000 mins (85yrs)

If 70 beats are made in 1 min, therefore, in 85yrs, the individual will make:

44,676,000*70 = 3,127,320,000 beats = 3.12732 × 10⁹ beats in 85yrs

4 0
3 years ago
PLEASE ANSWER NUMBER 17
Gnesinka [82]
OH MY GOSH I THINK I GET IT! difference as in division. it wants you to i think make for example make 2 the answer to an equation like 5-3=2! 5 and 3 are prime numbers.
7 0
3 years ago
( 7x + 2x - 3x2 + 9x) + (5x + 8x2 - 6x2 + 2x - 5)​
Elena-2011 [213]

Answer:

-x2+25x-5

Step-by-step explanation:

7x+2x−3x2+9x+5x+8x2−6x2+2x−5

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3 0
3 years ago
What is the probability that a dart will hit a spot in the shaded circle?
amid [387]

Answer:

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Step-by-step explanation:

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