Rose drew a regression line for this paired data set.
1 answer:
Answer:
A.
Step-by-step explanation:
We are given that,
The linear regression passes through the points (1,2) and (3,5).
As, the slope of a linear line is given by, .
We get, the slope of the linear regression is,
Slope = .
i.e. Slope = .
i.e. Slope = .
i.e. Slope = 1.5
As, the linear line is given by 'y=mx+b', where m is the slope and b is the y-intercept.
Substituting the slope and point (1,2) in the general form, we have,
implies
implies
i.e. b= 0.5
Hence, the equation for the regression line is
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Solution :
Let and
represents the proportions of the seeds which germinate among the seeds planted in the soil containing
and
mushroom compost by weight respectively.
To test the null hypothesis against the alternate hypothesis
.
Let denotes the respective sample proportions and the
represents the sample size respectively.
The test statistic can be written as :
which under follows the standard normal distribution.
We reject at
level of significance, if the P-value
or if
Now, the value of the test statistics = -1.368928
The critical value =
P-value =
= 0.171335
Since the p-value > 0.05 and , so we fail to reject
at
level of significance.
Hence we conclude that the two population proportion are not significantly different.
Conclusion :
There is not sufficient evidence to conclude that the of the seeds that
with the percent of the
in the soil.