IN A STUDY OF REACTION TIMES TO SPECIFIC STIMULUS, APSYCHOLOGIST RECORDED THESE
ID: 2918867 • Letter: I
Question
IN A STUDY OF REACTION TIMES TO SPECIFIC STIMULUS, APSYCHOLOGIST RECORDED THESE DATA (IN SECONDS) FIND THEVARIANCE AND STANDARD DEVIATION CLASSLIMITS FREQUENCY 2.1-2.7 12 2.8-3.4 13 3.5-4.1 7 4.2-4.8 5 4.9-5.5 2 5.6-6.2 1 IN A STUDY OF REACTION TIMES TO SPECIFIC STIMULUS, APSYCHOLOGIST RECORDED THESE DATA (IN SECONDS) FIND THEVARIANCE AND STANDARD DEVIATION CLASSLIMITS FREQUENCY 2.1-2.7 12 2.8-3.4 13 3.5-4.1 7 4.2-4.8 5 4.9-5.5 2 5.6-6.2 1Explanation / Answer
Class Limit
Mid point (X)
freqency (f)
fx
x2
fx2
2.1-2.7
2.4
12
28.8
5.76
69.12
2.8-3.4
3.1
13
40.3
9.61
124.93
3.5-4.1
3.8
7
26.6
14.44
101.08
4.2-4.8
4.5
5
22.5
Class Limit
Mid point (X)
freqency (f)
fx
x2
fx2
2.1-2.7
2.4
12
28.8
5.76
69.12
2.8-3.4
3.1
13
40.3
9.61
124.93
3.5-4.1
3.8
7
26.6
14.44
101.08
4.2-4.8
4.5
5
22.5