The graph shows a distribution of data. A graph shows the horizontal axis numbered 0.1 to x. The vertical axis is unnumbered. Th
e graph shows an upward trend from 0.1 to 0.5 then a downward trend from 0.5 to 1. Which statement about the data is true? The data has a standard deviation of 0.1. The mean of the data is greater than 0.5. A value of 0.7 is within 1 standard deviation of the mean. A value of 0.9 is more than 2 standard deviations from the mean.
2 answers:
Answer:
D. A value of 0.9 is more than 2 standard deviations from the mean
Step-by-step explanation:
In the figure attached, the distribution of data is shown.
From the picture we can see that:
- The data has a standard deviation of 0.15 (= 0.5 - 0.35 = 0.65 - 0.5)
- The mean of the data is 0.5
- A value of 0.7 is more than 1 standard deviation of the mean.
- A value of 0.9 is more than 2 standard deviations from the mean (0.8 is 2 standard deviations from the mean)
You might be interested in
Answer: answer is in the photo
Step-by-step explanation:
Answer:
The 99% confidence interval for the percentage of people who own a tablet computer is between 71.59% and 88.41%
Step-by-step explanation:
Confidence interval for the proportion of people who own a tablet:
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:
99% 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:
Percentage:
Multiply the proportion by 100.
0.7159*100 = 71.59%
0.8841*100 = 88.41%
The 99% confidence interval for the percentage of people who own a tablet computer is between 71.59% and 88.41%