Statistics
posted by ReeSha .
The Hill of Tara in Ireland is a place of great archaeological importance. This region has been occupied by people for more than 4,000 years. Geomagnetic surveys detect subsurface anomalies in the earth's magnetic field. These surveys have led to many significant archaeological discoveries. After collecting data, the next step is to begin a statistical study. The following data measure magnetic susceptibility (centimetergramsecond 10−6) on two of the main grids of the Hill of Tara.
Grid E: x variable
14.51 14.88 35.23 17.10 24.87 6.74 13.77
21.17 11.18 13.77 35.60 28.20 11.55 7.85
Grid H: y variable
16.11 40.55 23.63 51.83 20.81 17.52 45.25
46.19 12.35 10.00 46.66 26.92 13.29 24.10
(a) Compute Óx, Óx2, Óy, Óy2. (Round your answers to two decimal places.)
Óx =__
Óx2 = ___
Óy = ___
Óy2 = ___
(b) Use the results of part (a) to compute the sample mean, variance, and standard deviation for x and for y. (Round your answers to two decimal places.)
Grid E: x =
s2 =
s =
Grid H: y =
s2 =
s =
(c) Compute a 75% Chebyshev interval around the mean for x values and also for y values. (Round your answers to two decimal places.)
Grid E:
11 to 12
Grid H:
13 to 14

Statistics 
PsyDAG
I cannot answer all your questions. I do not know what the "apple" symbol signifies.
b. For both x and y, add the scores and divide by n to find the mean. Subtract the mean from each score, and square each one. The sum of these squared differences = variance. The variance = s^2 = s squared, so standard deviation = square root of variance. 
Statistics 
Anonymous
Gjbdd
Respond to this Question
Similar Questions

Math
Not sure how to phrase this question but  I want to know who won a contest that lasted over a 5 day period. Craig completed 50 surveys in 40 hours and Ohad completed 29 surveys in 34 hours and Brad completed 15 surveys in 20 hours. … 
magnetic field
A square loop with resistance R=0.001 Ohms,mass 1.0 gram, and side length 1.0 m is falling into a region of uniform magnetic field. The magnetic field has strength 1 Gauss and is pointing out of the page. The speed of the loop just … 
Statistics
The archeological site of Tara is more than 4000 years old. Tradition states that Tara was the seat of the high kings of Ireland. Because of its archeological importance, Tara has received extensive study (Reference: Tara: An Archeological … 
Statistics
The archeological site of Tara is more than 4000 years old. Tradition states that Tara was the seat of the high kings of Ireland. Because of its archeological importance, Tara has received extensive study (Reference: Tara: An Archeological … 
Sociology
Why do Sociologist use Surveys and what type of data do they receive from survey research? 
ireland
Hey. I was wondering if you could help me.... what are the main reasons Ireland has had a troubled relationship w/ great Britain? 
Business Law
Juan thinks he would like to purchase Tara's house, but doesn't know whether he will be able to save enough money for a down payment on a loan. Juan agrees to give Tara $5,000 for the option to purchase her house for $150,000 sometime … 
math
identify the variable, population and is this quantitative or qualitative The archaeological site of Tara is more than 4000 years old. Tradition states that Tara was the seat of the high kings of Ireland. Because of it's archaeological … 
physics
A 42 mT magnetic field points due west. If a proton of kinetic energy 9x10E12 J enters this field in an upward direction, find the magnetic force acting on the proton in magnitude and direction. What magnetic force would an electron … 
Physics 2
what magnetic force would an electron experience due to Earth’s magnetic field if it were moving at 3x10E6 m/s directly away from earth’s surface?