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Alisiya [41]
3 years ago
11

51 and 53 HELP PLS!!!!!!!

Mathematics
1 answer:
Gelneren [198K]3 years ago
5 0
Hi!
Answers:

51. w=9/4

53. b=12
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A method for assessing age-related changes that combines the cross-sectional and longitudinal approaches by observing a cross se
MrRissso [65]

Answer:

a. mixed longitudinal study

True, by definition a mixed-longitudinal study is when "have defined some cohorts and these are followed for a shorter period and we can compare the precision, bias due to age and cohort effects" on the entire study. So that represent the perfect mix between longitudinal and cross sectional study.

Step-by-step explanation:

a. mixed longitudinal study

True, by definition a mixed-longitudinal study is when "have defined some cohorts and these are followed for a shorter period and we can compare the precision, bias due to age and cohort effects" on the entire study. So that represent the perfect mix between longitudinal and cross sectional study.

b. limited longitudinal study

This definition is not appropiate and is not usually used in the experimental designs.

c. longitudinal study

False, a longitudinal study is a design on which have "repeated observations of the same variables over short or long periods of time" and for this case we need cross sectional conditions, so for this case not applies.

d. cohort study

False, by definition a cohort study is an extesion of the longitudinal design but on this case " the samples are obtained from a cohort using cross-section intervals through time" and for this reason not applies for our case since we need a longitudinal design combined with the cross sectional design

5 0
3 years ago
What is the ratio of 12 to 4​
arsen [322]

Answer:

it's <u>3</u><u>:</u><u>1</u>

Step-by-step explanation:

\frac{12}{4}   \:  \:  \:  \:  \:  \:  \frac{4}{4}  \\ 3 \:  \:  \:  \:  \:  \:  \:  \:  \: 1

7 0
3 years ago
Read 2 more answers
Can someone help me solve this?!
o-na [289]
y-3-(-12)≥0

y ≥ -9

y + 9.000 ≥ 0

y ≥ -9

I hope this helps!
3 0
3 years ago
Read 2 more answers
A lawn and garden store surveyed 250 random customers who bought perennial flowers. Participants were asked the question, "Would
Inessa05 [86]

Answer:

The question is not biased

The sample is biased because it does not represent the population of customers at the lawn and garden store

Step-by-step explanation:

I just took the test :)

7 0
2 years ago
A 300-lb gorilla climbs a tree to a height of 30 ft. Find the work done if the gorilla reaches that height in the following time
omeli [17]

Answer:

a) 9000 ft-lb

b) 9000 ft-lb

Step-by-step explanation:

Equation for the work:

The equation for the work done is given by:

W = Fd

In which F is the force needed and d is the distance. The time does not interfere on the work.

A 300-lb gorilla climbs a tree to a height of 30 ft

This means that F = 300, h = 30

Thus

W = Fd = 300(30) = 9000

The work done in both cases is of 9000 ft-lb, as the work is not a function of time.

4 0
3 years ago
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