CHPT 6 POSC 301

MEAN ABSOLUTE DEVIATION Q.1) Find the mean absolute deviation for the set below. S = {85, 90, 68, 75, 79} A. В. C. D. 79.4 6.48 32.4 79 Sherrie just registered for her wedding. So far 6 items have been fulfilled on her registry. Find the Q.2) mean price of the fulfilled items. $29, $58, $15, $129, $75, $22 43.5 129 54.7 114 А. В. С. D. Find the mean absolute deviation of the fulfilled items on Sherrie's registry. $29 , $58, $15, $129, Q.3) $75, $22 196 54.7 114 32.67 C. D.

10

3

What do you mean by Sample Variance, Sample Standard Deviation,and Standard Error?

A sports shop selects a random sample and records the sales of items made in China and thosemade in America. Country of origin n mean St.Deviation           China 50 22.5 9.75           America 33 33.15 11.6                             What is the SE Mean for the sales from China?

Could you help me with this homework question? I got an answer of 22.9

c and d part hand write

SCCoast, an Internet provider in the Southeast, developed the following frequency distribution on the age of Internet users. Find the mean and the standard deviation. (Round squared deviations to nearest whole number and final answer to 2 decimal places.)   Age (years) Frequency 10 up to 20   3   20 up to 30   7   30 up to 40   18   40 up to 50   20   50 up to 60   12

7

None

18. An insurance agent has claimed that the average age of policy-holders who insure through him is less than the average for all agents, which is 30-5 years. A random sample of 100 policy-holders who had insured through him gave the following age distribution : Age last birthday 16-20 21-25 26-30 31-35 36-40 No. of persons 12 22 20 30 16 : Calculate the arithmetic mean and standard deviation of this distribution and use these values to test his claim at the 5% level of significance. You are given that Z (1-645) = (0-95.

9

The reliability of an estimator is assessed in terms of its _____. Select one: a. mean  b. ease of computation c. coefficient of variation d. variance

Calculate SP (the sum of products of deviations) for the following scores, Note: Bothmeans are decimal values, so the computational formula works well.X Y0 41 10 54 12 11 3

A quality inspector took five samples, each with four observations, for the length of timefor a chemical test to return a conclusive result. All values are in minutes. Use this informationto develop ONE control chart for the variable measure of time. Use formulas Unit 4 zoom filesto assist with your calculations. The process distribution standard deviation is known to be 0.02minute. Develop the chart with 3-sigma limits. i need the graph as well

K The first statistics exam had a mean of 71 and a standard deviation of 15 points; the second had a mean of 82 and a standard deviation of 5 points. Anna scored a 84 on both tests. Megan scored 94 on the first exam and 74 on the second. They both totaled 168 points on the two exams, but Anna claims that her total is better. Explain. The total of Anna's z-scores is, which is greater than Megantotal of (Round to one decimal place as needed.)

For the following time series plots, explain what type of transformation, if any, would make the variance more stable.

0 2 A courier company guarantees its customers that the average time to pick up their packages is 20 minutes with a tolerance of ± 4 minutes. The company collected data on 30 actual arrival times and determined that the average is 20 minutes and standard deviation of this sample was 1 minutes. What is the Cpk of this package service process? 01 Less than 1 O Great than 2 1.33

2572/quizzes/secured#lockdown Continuous Question 2 Classify the random variable as either discrete or continuous. The number of runs scored in a 9 inning baseball game. O Discrete O ContinuouS Question 3 Larger values of the standard deviation result in a normal curve shifted to the right

no.4 only

A courier company guarantees its customers that the average time to pick up their packages is 20 minutes with a tolerance of 4 minutes. The company collected data on 30 actual arrival times and determined that the average is 20 minutes and standard deviation of this sample was 1 minutes. What is the Cpk of this package service process? O Less than 1 1.33 O Great than 2 01

p The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for admission to graduate study in business. The average GMAT score is 547 (Magoosh website). Assume that GMAT scores are bell-shaped with a standard deviation of 100. Use the empirical rule to answer the following. a. What percentage of GMAT scores are 647 or higher (to 1 decimal)? % b. What percentage of GMAT scores are 747 or higher (to 1 decimal)? c. What percentage of GMAT scores are between 447 and 547 (to 1 decimal)? d. What percentage of GMAT scores are between 347 and 647 (to 1 decimal)?

A a measure of the uncertainty associated with a parameter estimate that results from sampling variation is referred to as the standard deviation. an upward bias. the standard error. the sampling variation.

Given the following data .Find the OLS estimators using the deviation method. Y 6 10 9 14 7 5   X1 1 3 2 -2 3 5   X2 3 -1 4 6 2 4

I neeed help with all parts of this question

..is the best measure of dispersion. .. Select one: Range a. b. Variance Standard Deviation C.