Download Instruction for the CASIO fx-300 MS I. To calculate the mean and

Instruction for the CASIO fx-300 MS
I. To calculate the mean and standard deviation, your calculator must be in “SD” Mode. But first you should
clear the memory of your calculator.
To clear the memory be sure to press:Shift CLR 1 =
To put your calculator in “SD” Mode pres:Mode 2
1. To find the mean and standard deviation of the sample; 6.2 , 5.4 , 3.1 :
a. Enter the data : press
6.2 M+
5.4 M+
3.1 M+
b. To find the mean, press : Shift 21= (Answer : 4.9).
c. To find the sample standard deviation press : Shift 23= (Answer : 1.609347694)
2. To find the mean and standard deviation of the sample grouped data (frequency table)
(Make sure to clear the memory)
x (class midpoint)
f (frequecy)
5.5
15
9.5
27
13.5
6
a. Enter the data : press
5.5 Shift , 15 M+
9.5 Shift , 27 M+
13.5 Shift , 6 M+
b. To find the mean, press : Shift 21 = (Answer : 8.75)
c. To find the sample standard deviation, press : Shift 23 = (Answer : 2.564072558)
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II To do Linear correlation and regression, your calculator must be in “REG” “Lin” Mode.
To clear the memory be sure to press:Shift CLR 1 =
To put your calculator in “REG” “Lin” Mode pres:Mode 31
1. To find the correlation coefficient r of the sample grouped data
x
y
25
32
32
35
41
28
a. Enter the data : press
25 , 32 M+
32 , 35 M+
41 , 28 M+
b. To find r , press : Shift 2 >> 3 = (Answer : -0.627185996)
2. To find the equation of the regression line ( y = b0 + b1 x ) and use it for prediction:
a. To find b0 press : Shift 2 >> 1 = (Answer : 40.6373057)
b. To find b1 press : Shift 2 >> 2 = (Answer : -0.274611399)
c. To predict y when x = 30 using the regression line, press 30 Shift 2 >>> 2 =
(Answer : 32.39896373)
d. To predict x when y = 33 using the regression line, press 33 Shift 2 >>> 1 =
(Answer : 27.81132075)
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