Answer:
135
Step-by-step explanation:
Answer:
Step-by-step explanation:
First you need to find the mean of the set so 10+12+8+2=32/4=8
Mean=8
Then subtract the mean of each number and square the result
10-8=2^2=4
12-8=4^2=16
8-8=0^2=0
2-8=-6^2=36
new data set: 0,4,16,36
Next find the mean of this set of data
0+4+16+36=56/4=14 now take the square root of that mean
sqrt14=3.74
Hope this helps
Answer:
The 90% confidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.369, 0.431).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
For this problem, we have that:
90% confidence level
So , z is the value of Z that has a pvalue of , so .
The lower limit of this interval is:
The upper limit of this interval is:
The 90% confidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.369, 0.431).
Divide 50 by 22: 2.27272727...
Round up to hundredth and your final answer is 2.27
hope that helps :)
Answer: the answer is c
Step-by-step explanation: