8.)
An empirical relationship exists between mean, median and mode. For a moderately skewed distribution it is: If a frequency distribution has a symmetrical frequency curve, the mean, median and mode are equal.
data valu es in a 7. The 68-95-99.7 rule for normal distributions states that 95% of the mally distributed data set will be within 2 standard deviations of the mear Generate numbers with a distri...
According to the 68-95-99.7 rule what percent of the population are more than 2 standard deviations away from the mean? A) 5 B) 2.5 c) 95 d) 68
-99.7% of data are within 3 standard deviations of the mean (* - 35 to ++ 3s) 34% 34% 2.4% 24% 0.1% 0.1% 135% 13.5% x-35 x 2s X-s *+s *+ 2s * + 3s More specifically, we can think of relabeling the labels on the x-axis. Starting at the center (the mean), moving toward the right we would have T= 35 (the center] T + s = 42 [one SD above] 1 + 2s 49 (two SDs above] T...
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...
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.
Answer the number 3 and 4 question Worksheet 2: Chapters 3 and 8 (Normal Distributions; Sampling) Math 243, Sunmmer '19, Vargas (c) (3.5) What percentage of all MLB players are shorter than your team's shortest player, according to the Normal distribution? What about taller than your team's tallest player? 3. (3.4) Consider the N(73.7,2.3) distribution for the height in the population of all MLB players. (a) From the population, find the intervals of player heights within one standard deviation of...
Answer the following question involving "The Normal Distribution and the 68-95-99.7 Rule" and show how I got the answers below. Answers: 1)a) 68% b) 47.5% c) 2.5% 2) 12 or 13 people Questions: 1) A population of dogs have weights that are normally distributed with an average of 30 pounds with a standard deviation of 3 pounds. a) What percent of the dogs weigh between 27 and 33 pounds? b) What percent of the dogs weigh between 30 and 36...
please do all asap Question 7 2.5 points Save Answer Use the 68-95-99.7 rule to solve the problem. Assume that a distribution has a mean of 21 and a standard deviation of 4. What percentage of the values in the distribution do we expect to fall between 17 and 217 17% 25% 68% 34% Question 5 Use the Venn diagram to list the elements of the set in roster form. U B 11 14 13 17 12 15 16 18...
Q2. The applications of the 68%-95%-99.7% Empirical Rule and Chebbysheff's Theorem (1) Please use your words to explain what is the 68%-95%-99.7% empirical rule. (2) Please use your words to explain what is the Chebbysheff’s Theorem. (3) Now, suppose there is a normally distributed data set with the mean of 30 and the standard deviation of 5, what can you say about the proportions of observations that lie between each of the following intervals: (i) 25 and 35? (ii) 20...
57 standard normal probability distribution function The staand σ 1) is graphed in the standard (x,y) dinate plane below. Which of the following cclosest to the percent of the data points within 2 standard deviations of the mean in (H percentages is that are any normal distribution? ceare 0.5 0.2 A. 50% B. 68% C. 90% D. 95% E. 99% 3 2 1 -0.2 standard normal probability distribution function The staand σ 1) is graphed in the standard (x,y) dinate...
A characteristic of the Normal models is the 68-95-99.7 Rule. But when we want to work with values that don't match up with this rule, we use one of two built-in commands in the graphing calculator. The commands are normalcdf and invNorm, and to find these commands, go to 2"d DISTR and choose option 2 or 3. Notes for normalcdf: The command format is normalcdf(lower bound, upper bound, mean, standard deviation). We use this command when we are looking for...