Ragon, who lives on this planet, does a survey and finds that her colony of 237 contains 45 black-footed, one-headed Mizjigs; 69
red-footed, two-headed Mizjigs; and 115 one-headed Mizjigs.
How many black footed Mizjigs are there in Ragon's colony?
How many black footed Mizjigs are there in Ragon's colony?
1 answer:
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Answer:
And the confidence interval for this case
Step-by-step explanation:
We know the following info from the problem
sample mean for the group 1
the standard deviation for the group 1
the sample size for group 1
sample mean for the group 2
the standard deviation for the group 2
the sample size for group 2
We have all the conditions satisifed since we have random samples.
We want to construct a confidence interval for the true difference of means and the correct formula for this case is:
The degrees of freedom are given :
The confidence level is 0.9 or 90% and the significance level is and
and the critical value for this case is:
And replacing the info given we got:
And the confidence interval for this case