#### STT102 Tma Questions

**The following data were collected on ten infants. Fin the standard error, \[S_{yx}\]. Where\[ S_{yx}^2 = \sum_{i=1}^{10} {y_{i} – \hat y_{i}}^2\} \]and \[y_{i} \]are the observed values , \hat y_{i} are the predicted values**

\[\S_{yx} = 5.75\]

\[\S_{yx} = 4,75\]

\[\S_{yx} = 2.75\]

\[\S_{yx} = 3.75\]

**Given the general form of linear equation \[y = b + b_{1}X \]. If\[b_{1} > 0\], then the line slopes**

downward

upward

flat

parallel

** In the age distribution of Receipients of Nursing scholarship of 25, 21, 22, 20, 19, 30, 27, 28, 32 and 18. Determine the variance. (Hint: use\[ S^2 = \sum X – \bar {X}^2\]**

215.6

251.6

225.6

252.6

**Consider Attitude Scores for five newly admitted Nursing students towards alcoholic patients below: Attitude: 5, 4, 3, 2, 1 . The percentage due to attitude 3 is ________**

0.5

0.4

0.2

0.3

**The data below represent systolic blood pressure readings (mm Hg), using Spearman’s Rank Order Correlation method, determine correlation coefficient \[r_{s}\] of the two readings.**

\[r_{s} = 0.23\]

\[r_{s} = -0.32\]

\[r_{s} = 0.32\]

\[r_{s} = -0.23\]

**One Precaution in correlation is that _________**

Correlation is a causation

Correlation is not a causation

Correlation does not apply to a range of values observed for two variables

Correlation means that one variable is not independent of the other

**Determine Correlation Coefficient ‘r’ using the above values or from your direct-calculation**

0.9

0.91

0.95

0.92

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