The data set provides measurements of 5 different samples.  Answer the following questions if you were to create an xbar control chart, suppose the population standard deviation is unknown.    For your convenience,  the control chart constant table is provided   control chart data set provided   1.  What is the centerline, rounded to two decimal places?  2.  What is the UCL, rounded to two decimal places?    3.  What is the LCL, rounded to two decimal places?   Table of constants for Xbar and R control charts                           Charts for Averages Charts for Ranges     Control Limits Factor Divisors to Estimate σx Factors for Control Limits   sample size, n A2 d2 D3 D4   2 1.88 1.128 - 3.267   3 1.023 1.693 - 2.574   4 0.729 2.059 - 2.282   5 0.577 2.326 - 2.114   6 0.483 2.534 - 2.004   7 0.419 2.704 0.076 1.924   8 0.373 2.847 0.136 1.864   9 0.337 2.97 0.184 1.816   10 0.308 3.078 0.223 1.777   15 0.223 3.472 0.347 1.653   25 0.153 3.931 0.459 1.541     Control chart question data set                       sample measurements 1 50.5 51.2 49.8 50.2 2 47.8 48.9 50 50.2 3 48.9 50.9 51.3 49.7 4 47.7 48.1 49 49.9 5 49.7 50 51.4 53.2

Answer all questions: 1. What is the range and standard deviation for the following population of scores? Scores: 5,2,5,4

Please answer the following: You can Thank you.  Adult IQ scores can be modeled using a normal model with mean 100 and a standadrd deviation of 15. a. Find the prportion of IQ scores that are less than 115. b. Find the proportion of IQ scores that are greater than 131.5. c. Find the proportion of IQ scores between 90 and 110. d. Find the proportion of IQ scores that are betewwn 110 and 120. e. Find the IQ score above which there are 10% of the scores. f. Find the IQ score below which there are 20% of the scores.

The following data represents the number of children in each household on Wisteria Lane. 1, 3, 4, 0, 0, 1, 2, 3, 2, 2 Match the correct value with the correct measure of spread. 1.04 1. Range 4 2. Interquartile Range 1.32 3. Mean Absolute Deviation 4. Standard Deviation

Please help me with this question.

what was the age distribution of prehistoric Native America? Extensive , anthropological studies in the southwestern United states gave the following information about a prehistoric extended family group of 82  members on what is now a native american reservation. for this community, estimate the mean age expressed in years, the sample variance, and the sample deviation. For the class 31 and over, use 35.5 as the class midpoint. 39,16, 20,7

Find the mean, median, mode, and standard deviation of the following sample. Round your answer to two decimal places. 22.6 16.1 36.1 36.0 23.8 20.3