A scientist collected data in 10 trials comparing tired students' and awake students' test scores. Trial Tired Average Score Awake Average Score 1 34% 67% 2 56% 88% 3 60% 90% 4 58% 86% Which trial was the least precise and is unlikely to be reproducible?

Scores of trial 2,3 are more accurate while trail 1 is the least precise as well as un-reproducible.

Explanation:

The second rating is really similar to the first since Score 1 is 34 points, 64 points.

They measure the average as 34 + 67/2 = 50.5

Deviations from the defined values are determined as follows:

50.5-34 = 16.5 & 50.5-67 = -16.5

Then the total variance is = (16.5 + -16.5)/2 = 0.00

Calculating Rating 2 by the provided values: 56 percent, 88 percent.

We measure an average of 56 + 88/2 = 72.

Deviations from the specified values are determined as follows: 72-56 = 16, 72-88 =-16.

The maximum variations here are 0.00.

Calculation of Score 3 by the specified values: 60 percent, 90 percent.

Similarly, we will consider the Median as 60 + 90/2 = 75.

Deviations from this are 75-60 = 15, 75-90 = -15.

The maximum variations here are 0.00.

The assigned Score 4 is 58 per cent, 86 per cent and its average is 72 and its deviation is-14, while its average deviation is 0.

Result: Trail 1 has a high divergence, so it is less reliable.

28. evolution

29. environment, survive, offspring  

explanation:

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.