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BaLLatris [955]
2 years ago
6

Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enroll

ed in. The students collect a random sample of 47 students. The mean of the sample is 12.3 units. The sample has a standard deviation of 1.9 units.What is the 95% confidence interval for the average number of units that students in their college are enrolled in? Assume that the distribution of individual student enrollment units at this college is approximately normal.(____,______)Your answer should be rounded to 2 decimal places.
Mathematics
1 answer:
GaryK [48]2 years ago
3 0

Answer:

(11.76, 12.84)

Step-by-step explanation:

Given that we can assume that the distribution of individual student enrollment units at this college is approximately normal.

Sample mean =12.3

sample std dev s = 1.9 units

Sample size = 47

Std error = \frac{1.9}{\sqrt{47} } \\=0.277

Z critical value for 95% = 1.96

Margin of error = 1.96*0.277=0.543

Confidence interval =

(12.3-0.543, 12.3+0.543)\\= (11.757, 12.843)

=(11.76, 12.84)

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3 0
3 years ago
Select the rational expression that is equivalent to the given expression below. 4 over x - 3
Ad libitum [116K]
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3 years ago
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6 0
2 years ago
Read 2 more answers
1/ 99 to 4 significant figures​
musickatia [10]

Answer:

  0.01010

Step-by-step explanation:

The decimal equivalent is ...

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Rounded to 4 significant figures, it is ...

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4 0
2 years ago
Please please please help me with this answer
Sergio039 [100]

Hello,

85 / 12 ≈ 8

Bye ;)

3 0
2 years ago
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