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1 answer:
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Answer:
(c) The x and y coordinates are switched
Step-by-step explanation:
Given
See attachment
Required
Determine the error in the plot
The plot on the attached graph is represented with:
This implies that Raj plotted the x coordinate on the y coordinate and vice versa.
Hence: (c) is true
Answer:
We conclude that children in district are brighter, on average, than the general population.
Step-by-step explanation:
We are given the following data set:
105, 109, 115, 112, 124, 115, 103, 110, 125, 99
Formula:
where are data points,
is the mean and n is the number of observations.
Sum of squares of differences = 642.1
We are given the following in the question:
Population mean, μ = 106
Sample mean, = 111.7
Sample size, n = 10
Alpha, α = 0.05
Sample standard deviation, s = 8.44
First, we design the null and the alternate hypothesis
We use one-tailed(right) t test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.
We conclude that children in district are brighter, on average, than the general population.