Answer:
The 95% confidence interval is ( 27.126 , 34.674)
Step-by-step explanation:
Given
The t critical value at 0.05 level = 2.023 for the df = 39
Confidence interval = 95%
Mean
Substituting the given values we get -
Hence, the 95% confidence interval is
( 27.126 , 34.674)
The Venn diagram is given below. Then the number of students who have brother and sister will be 6.
<h3>What are sets?</h3>A set is a group of clearly specified components. The number of items in a finite set is denoted by a curly bracket.
In a class of 20 students:
11 have a brother, 9 have a sister, and 6 have neither.
Then the Venn diagram will be
11 – a + a + 9 – a = 20 – 6
20 – a = 14
a = 6
The Venn diagram is given below.
More about the sets link is given below.
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Answer:
Step-by-step explanation:
Given : Sample size :
The mean amount of money spent per owner =
Standard deviation :
Significance level :
Critical value :
We know that the confidence interval for population mean is given by :-
Hence, the 95% confidence interval for the mean amount spent per owner for an obedience class will be