Question
A group of500 ClassX students has approximately normally distributed scores with mean80 and standard deviation8. Approximately how many students score below88?
The correct answer is
421
The standardized score is \(z=(88-80)/8=1\). About84.13% of a normal distribution lies below z=1, giving \(500(0.8413)=420.65\approx421\) students.
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Important Questions from Measurement and Analysis of Data
- The following are the methods of nutritional assessment using anthropometry.
(i) Skin fold thickness
(ii) 24 hrs dietary recall
(iii) Mid Upper Arm Circumference
(iv) Blood Pressure
(v) Waist Hip Ratio
code : - Which of the following is not a method of Nutritional Status Assessment by anthropometry ?
- An increase in the alpha, the level of significance, causes
- The following assumptions must be fulfilled in the Chi-square test of significance
a. data should be continuous.
b. data has to be in frequencies.
c. all observations should be independent.
d. obtained frequencies are equal in all cells.
e. data has to be in ratio scale.
Codes : - Assertion (A) : The hypothesis that the researcher puts to test is called null hypothesis.
Reason (R) : The alternate hypothesis is accepted only when null hypothesis is rejected.
Codes :
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