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aliina [53]
3 years ago
8

Eighteen individuals who use a particular form of social media were assigned a new user interface to use when logging into their

accounts. after using the new user interface for a week, each individual was asked to rate how easy or hard the new user interface was to use on a scale from 1 (extremely easy) to 9 (extremely hard). which of the following correctly identifies why this is not a well designed experiment?
A. There was a lack of control because not all individuals in the study used login passwords of the same length

B. The individuals may not have been randomly selected

C. There was not enough replication because the individuals used the new user interface for only one week.

D. there was a lack of control because not all individuals in the study use social media

E. the study was not comparative- only one treatment was used.
Mathematics
2 answers:
lianna [129]3 years ago
5 0

Answer:

Answer E . The study was not comparative—only one treatment was used.

Step-by-step explanation:

Well-designed experiments should involve comparisons of at least two treatment groups, one of which could be a control group.

Lisa [10]3 years ago
3 0

Answer:

E: The study was not comparative—only one treatment was used.

Step-by-step explanation:

Well-designed experiments should involve comparisons of at least two treatment groups, one of which could be a control group.

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a square with an area of 144 cm² is reduced by a factor of 1/3 how long are the new sides of the square?​
olga55 [171]

Answer:

4  cm

Step-by-step explanation:

The square root of 144 is 12 (12 x 12 = 144) so we know our sides of the square are 12 cm²

12 / 3 = 4

(\frac{12}{1} x \frac{1}{3})

The sides of the new square are 4 :)

Hope this helps and is correct, have a nice day! :D

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3 years ago
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Leno4ka [110]

A function z=f(x,y) has two partial derivatives and y. These derivatives correspond to each of the independent variables and can be interpreted as instantaneous rates of change (that is, as slopes of a tangent line). Similarly, ∂z/∂y represents the slope of the tangent line parallel to the y-axis.

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2 years ago
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Reil [10]
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6 0
3 years ago
A construction crew is lengthening a road. The road started with a length of 51 miles, and the crew is adding 2 miles to the roa
nikitadnepr [17]

Answer:

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Step-by-step explanation:

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Total length of the road after 33 days of the construction will be 117 miles.

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