A data distribution has a mean of 10 and a standard deviation of 1. Suppose we do not know if the distribution is bell-shaped or not. Estimate the proportion of data that falls between 9 and 11.
A. Cannot be determined
B. 95%
C. 99.7%
D. 68%
A data distribution has a mean of 10 and a standard deviation of 1. Suppose we...
Consider a bell-shaped symmetric distribution with mean of 128 and standard deviation of 3. Approximately what percentage of data lie between 119 and 128? A)68% B)99.7% C)49.85% D)47.5% E)95%
Assume that a normal distribution of data has a mean of 12 and a standard deviation of 3. Use the 68-95-99.7 rule to find the percentage of values that lie below 9.
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.
If a variable has a distribution that is bell-shaped with mean 28 and standard deviation 7, then according to the Empirical Rule, 99.7% of the data wille between which values? (This is a reading assessment question Be certain of your answer because you only get one attempt on this question According to the Empirical Rule, 99.7% of the data wille between and (Type integers or decimals rounded to two decimal places as needed Use ascending order)
Assume that a normal distribution of data has a mean of 20 and a standard deviation of 5. Use 68 - 95 - 99.7 rule to find the percentage of values that lie above 15. What is the percentage of values lie above 15?
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.
GPAs at CCCOnline are normally distributed with a mean of 2.25 and a standard deviation of 0.46. Find the z-score for a GPA of 3.13. 1.087 1.804 0.8478 1.913 1.261 1.109 Adult men have heights with a mean of 69.0 inches and a standard deviation of 8 inches. Find the z-score of a man 76.9 inches tall. (to 2 decimal places) The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs....
The mean score of a competency test is 72, with a standard deviation of 4. Between what two values do about 68% of the values lie? (Assume the data set has a bell-shaped distribution.) a Between 64 and 80 b Between 56 and 88 c Between 68 and 76 d Between 60 and 84
0.In a normal distribution, plus and minus 2 standard deviations from the mean will include about what percent of the observations? A) 50% B) 99.7% C) 95% D)68% 21. What is the area under the normal curve between z -0.0 and z-2.0 A) 1.0000 B) 0.7408 C) 0.1359 D) 0.4770 22. Which of the following is NOT a characteristic of the normal probability distribution? A) Positively-skewed B) Bell-shaped C) Symmetrical D) Mean Mode and median are all equal 23. A...
A major cab company in Chicago has computed its mean fare from O'Hare Airport to the Drake Hotel to be $28.41, with a standard deviation of $3.09. Based on this information, complete the following statements about the distribution of the company's fares from O'Hare Airport to the Drake Hotel. (a) According to Chebyshev's theorem, at least ________ (56% 75% 84% or 89%) of the fares lie between 22.23 dollars and 34.59. (b) According to Chebyshev's theorem, at least _________ (56%...