For normally distributed data, what is the probability that a data point wil fall within one...
A useful rule of thumb generally used when statistically treating known normally distributed data is the 68-95-99.7 rule. This rule stipulates that about 68% observations fall within __________ standard deviations, about 95% of observations fall within ________ standard deviations, and 99.7% of observations fall within __________ standard deviations.
15.When a distribution is bell-shaped, approximately what percentage of data values will fall within 1 standard deviation of the mean? a. 50% c. 95% b. 68% d. 99.7% 21. If the mode is to the left of the median and the mean is to the right of the median, then the distribution is _________ skewed.
In a normally distributed data set with a mean of 22 and a standard deviation of 4.1, what percentage of the data would be between 17.9 and 26.1? a)95% based on the Empirical Rule b)99.7% based on the Empirical Rule c)68% based on the Empirical Rule d)68% based on the histogram
Suppose a normally distributed set of data has a mean of 172 and a standard deviation of 15. Use the 68-95-99.7 rule to determine the percent of scores in the data set expected to be between the scores 142 and 187. Give your answer in decimal form and keep all decimal places throughout your calculations and in your final answer.
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 25. Use the 68-95-99.7 rule to find the following quantities.
Assume the resting heart rates for a sample of individuals are normally distributed with a mean of 80 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities. a. The relative frequency of rates less than 120 using the 68-95-99.7 rule is what rounded to three decimals?
Use the 68-95-99.7 rule to solve: The amount of Jen's monthly phone bill is normally distributed with a mean of $48 and a standard deviation of $6. Fill in the blanks. 95% of her phone bills are between $ and $ .
The amount of dollars an American spends in a month on groceries is normally distributed with a mean of $300 and a standard deviation of $20. Using the standard deviation rule, approximately what percentage of spend between $240 and $360? O A 68% B. 95% 99.7% OD. 50% Question 4 2 points Save Ang Researchers sample a number of students and record their age (in years), year in school (Freshman, Sophomore, Junior, Senior), zip code, and income (as <$5,000 per...
Assume that a set of test scores is normally distributed with a mean of 100 100 and a standard deviation of 15 15. Use the 68-95-99.7 rule to find the following quantities. a. The percentage of scores less than 100 is 50%. (Round to one decimal place as needed.) b. The percentage of scores greater than 115%. ___ (Round to one decimal place as needed.) c. The percentage of scores between 70 and 115%. ___ (Round to one decimal place...
For normally (Gaussian) distributed data, what percentage of the data lies within 0.1 standard deviation(s) of the mean?