jar fill is 205 grams. The standard deviation of the jar fills is 2.5 grams. If the population…
Two random variables are normally distributed with the same mean. One has a standard deviation of 10 while the other has a standard deviation of 15. How will the graphs of the two variables differ and how will they be alike?…
Variance: 1,112 is 6160.5; 1,1245 is 29768; 1,361 is 64800; 1,372 is 68820.5; 1,472 is 110920.5…
Sample Variance: 86.49866667 (Calculation shown on the next page: used a spreadsheet and pasted into the document)…
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.…
True-the standard deviation is sensitive because variability exists in a set of scores that deviate from the mean.…
The Standard deviation is more useful for computing and understanding the measure of something. For example, if you know the standard deviation of a test given to a group of students is 5 and the average is 80, this tells you much more information than just having the average score. If on the other hand the standard deviation is 20 and the average is still 80, this tells yet another story.…
Standard deviation: 1.317Calculations were derived by using the minitab and going into the Stat > Basic Statistics > Display Descriptive Statistics > Variables than select the C14 (Die1) > below enter the statistics and check mark only mean and standard deviation > enter OK twice than you get the answer for the mean and…
Which of the following values from Table 1 tells us about variability of the scores in a distribution?…
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.…
inch with a standard deviation of 0.004 inch. The quality-control inspector takes a random sample of 30…
The credit balance is represented by the $ and the income is represented by the $1000s.…
σA = 0.3 × (0.07)2 + 0.4 × (0.06)2 + 0.3 × (0.08)2 − (0.021)2 = 0.004389,…
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?…
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?…