A sample of students attending a large university has been selected. Is there a statistically significant difference between Lib
1 answer:
Answer:
Since p is less than 0.05, our alpha, this difference is considered to be extremely statistically significant.
Step-by-step explanation:
Given that a sample of students attending a large university has been selected. Is there a statistically significant difference between Liberal Arts majors and other students on average number of books (other than those required by course work) read per year
Group Group One Group Two
Mean 16.200 13.700
SD 2.300 9.000
SEM 0.150 0.502
N 236 321
(two tailed test)
The mean of Group One minus Group Two equals 2.500
95% confidence interval of this difference: From 1.321 to 3.679
Intermediate values used in calculations:
t = 4.1675
df = 555
standard error of difference = 0.600
The two-tailed P value is less than 0.0001
Since p is less than 0.05, our alpha, this difference is considered to be extremely statistically significant.
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Answer:
5
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
In this problem, we have that:
On average, how much error would be expected between the sample mean and the population mean?
This is the standard deviation of the sample. We have that . So
The answer is 5.
Answer:
y = 3x represents the graph. The point (4, 12) is on the line that is not shown on the graph.
Step-by-step explanation:
The equation of the line that goes through origin= y = mx
Take any to points from the line
(0,0) & ( 2,6)
Equation of the line:
y = 3x
Plugin x = 4,
y = 3*4 = 12
(4,12) is on the line.