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%
Consider a bell-shaped symmetric distribution with mean of 128 and standard deviation of 3. Approximately what...
Consider a symmetric distribution which has two modes, a mean of 68 and standard deviation of 6. Approximately what percentage of data lie between 56 and 80? A)95% B)75% C)5% D)13.5% E)68%
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.
A distribution of numbers is approximately bell-shaped. If the mean of the numbers is 129 and the standard deviation is 15, a. between what two numbers would approximately 68% of the values fall? between _____ and ______ b. Between what two numbers would 95% of the values fall? between _____ and _______ c. Between what two values would 99.7% of the values fall? between ______ and ______
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 50 ounces and a standard deviation of 3 ou Use the Empirical Rule, also known as the 68-95-99.7 Rule. Do not use Tables or Technology to avoid rounding errors. Suggestion: sketch the distribution in order to answer these questions. a) 99.7% of the widget weights lie between and b) What percentage of the widget weights lie between 47 and 59 ounces?...
10) Suppose that a distribution of test scores is approximately symmetric and bell-shaped and the middle 95% of scores are between 72 and 84. What are the mean and standard of this distribution? Mean 78, SD-3
Data are drawn from a bell-shaped distribution with a mean of 80 and a standard deviation of 4 a. Approximately what percentage of the observations fall between 72 and 88? (Round your answer to the nearest whole percent.) Percentage of observations b. Approximately what percentage of the observations fall between 68 and 92? (Round your answer to the nearest whole percent.) Percentage of observations c. Approximately what percentage of the observations are less than 76? (Round your answer to 1...
For bell shaped data with a mean of 85 and a standard deviation of 29, approximately A) 2.5% of the values lie above_______ B) 16% of the values lie below________ C)0.15% of the values lie above_______
Data are drawn from a bell-shaped distribution with a mean of 95 and a standard deviation of 6. a. Approximately what percentage of the observations fall between 83 and 107? (Round your answer to the nearest whole percent.) b. Approximately what percentage of the observations fall between 77 and 113? (Round your answer to the nearest whole percent.) c. Approximately what percentage of the observations are less than 83? (Round your answer to 1 decimal place.)
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 47 ounces and a standard deviation of 8 ounces. Use the Empirical Rule, also known as the 68-95-99.7 Rule. Do not use Tables or Technology to avoid rounding errors. Suggestion: sketch the distribution in order to answer these questions. a) 95% of the widget weights lie between and b) What percentage of the widget weights lie between 23 and 63 ounces?...
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%