ABN also has the smallest standard deviation shown as standard error on the table…
The standard deviation of a sample of 100 observations equals 64. The variance of the sample equals…
7. The mean (X) is a measure of central tendency of a distribution, while the SD is a measure of the dispersion or variability of its scores. Both X and SD are descriptive statistics.…
3. Question : In a manufacturing process a random sample of 36 bolts manufactured has a mean length of 3 inches with a standard deviation of .3 inches. What is the 99% confidence interval for the true mean length of the bolt?…
Variance: 1,112 is 6160.5; 1,1245 is 29768; 1,361 is 64800; 1,372 is 68820.5; 1,472 is 110920.5…
σA = 0.3 × (0.07)2 + 0.4 × (0.06)2 + 0.3 × (0.08)2 − (0.021)2 = 0.004389,…
what the standard deviation is – the average distance each data value is from the…
The credit balance is represented by the $ and the income is represented by the $1000s.…
* Definition- about 68% (more precisely, 68.3%), or just over two-thirds, of the data points fall within 1 standard deviation of the mean.…
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking—even if they are not exposed to the usual pattern of sunlight. To test this notion, eight paid volunteers were placed (individually)b in a room in which there was no light from the outside and no clocks or other indications of time. They could turn the lights no and off as they wished. After a month in the room, each individual tended to develop a steady cycle. Their cycle at the end of the study was as follows: 25, 27, 25, 23, 24, 25, 26, and 25.…
Standard deviation is a measure of the data spread and it is signified by the Greek letter sigma (σ). The standard deviation requires calculation of the average, compare each respondent’s value to the average, and square that difference (Burns & Bush, 2012, pg. 252). Therefore, the formula for standard deviation is the square root of the variance. The variance is the average of the squared differences of the mean. The standard deviation explains the density of data scattered around the mean. Curve distribution is a bell shaped curve when data is tightly bunched together. Highly arched bell shaped curves have a small standard deviation. Flat bell shaped curves have a large standard deviation.…
Which of the following values from Table 1 tells us about variability of the scores in a distribution?…
7. The mean () is a measure of central tendency of a distribution while the SD is a measure of dispersion of its scores. Both and SD are descriptive…
It is not uncommon for the evening news to talk about the local, state, or national budget. Controlling finances is an important issue for governments at many levels. Families also must control their finances. Some families create budgets that they stick to carefully, recording all outgoing and incoming money so that they never spend more than they bring in. Other families keep at least a mental count of where their finances stand. But what about young people—people your age?…
11. If the coefficient of variation is 40% and the mean is 70, then the variance is…