What does a negative on the Richter scale mean?

An earthquake of negative magnitude is a very small earthquake that is not felt by humans.

Is the magnitude of an earthquake measuring 7.0 on the Richter scale an outlier?

Is the magnitude of an earthquake measuring 7.0 on the Richter scale an outlier when considered in the context of the sample data given? Yes, because this value is very far away from all of the other data values.

What important feature of the data is not revealed by any of the measures of center?

The measures of center do not reveal anything about the pattern of the data over time, and it is important to monitor the number of manatee deaths caused by collisions with watercraft, so that corrective action might be taken.

Can you have negative magnitude?

Answer: Magnitude cannot be negative. It is the length of the vector which does not have a direction (positive or negative). In the formula, the values inside the summation are squared, which makes them positive.

Is negative magnitude an error?

Certain earthquakes have a negative magnitude, is this an error? No, it is not an error. As magnitude calculations are based on a logarithmic scale, a ten-fold drop in amplitude decreases the magnitude by 1. 1000 times less (0.02 millimetres) corresponds to magnitude -1.

What should be the value of the standard deviation?

Statisticians have determined that values no greater than plus or minus 2 SD represent measurements that are more closely near the true value than those that fall in the area greater than ± 2SD. Thus, most QC programs call for action should data routinely fall outside of the ±2SD range.

Which measure of variation is most sensitive to extreme values?

The mean is sensitive to all scores in a sample (every number in the data affects the mean), which makes it a more “powerful” measure than the median or mode. The mean’s sensitivity to all scores also makes it sensitive to extreme values, which is why the median is used when there are extreme values.

Which of the following is not a measure of dispersion or variability?

Absolute measures include Range, quartile deviation, mean deviation, and standard deviation. Relative measures include coefficients of range, quartile deviation, variation, and mean deviation. Hence, Quartile is not the measure of dispersion.

What is the only measure of center that can be found for both quantitative and qualitative?

The only measure of center that can be found for both quantitative and qualitative data is the midrange median. mean.

What happens if the magnitude is negative?

Question: Can magnitude be negative? Answer: Magnitude cannot be negative. It is the length of the vector which does not have a direction (positive or negative). In the formula, the values inside the summation are squared, which makes them positive.

Why can distance be negative?

Distance can never be negative and distance travelled never decreases. So the negative and positive sign along with the magnitude of displacement indicates the direction of the motion of the object.

What if my z-score is negative or positive?

If you noticed there are two z-tables with negative and positive values. If a z-score calculation yields a negative standardized score refer to the 1st table, when positive used the 2nd table. For George’s example we need to use the 2nd table as his test result corresponds to a positive z-score of 0.67.

How do you interpret z scores in a Z-table?

Negative scores in the z-table correspond to the values which are less than the mean. Find values on the right of the mean in this z-table. Table entries for z represent the area under the bell curve to the left of z. Positive scores in the Z-table correspond to the values which are greater than the mean.

What do the z values in a Z table represent?

Table entries for z represent the area under the bell curve to the left of z. Negative scores in the z-table correspond to the values which are less than the mean. Find values on the right of the mean in this z-table.

How do you find the second decimal from Eric’s Z score?

Since Eric’s Z score value is positive, we will use the Z-table with positive values (Table 1.2). Find the corresponding value for the first two digits on the y axis (0.5 based on Eric’s Z score). Once you have that, go alongside the X axis to find the value for the second decimal (0.06 based on Eric’s Z score). We get the number 0.7123.