Consider a set of 50 measurements with a mean of 50.2 and a standard deviation of 18.7 and with the following observed and expected frequencies. $$\begin{array} { l c c }
\text { Interval } & \text { Observed Frequencies } & \text { Expected frequencies } \
39.99 \text { and less } & 12 & 14.56 \
40 - 59.99 & 18 & 20.365 \
60 - 79.99 & 15 & 12.28 \
80 \text {-and higher } & 5 & 2.795
\end{array}$$ It is desired to test whether these measurements came from a normal population.
-Calculate the value of the chi-square test statistic?

Question

Consider a set of 50 measurements with a mean of 50.2 and a standard deviation of 18.7 and with the following observed and expected frequencies. $$\begin{array} { l c c } 
\text { Interval } & \text { Observed Frequencies } & \text { Expected frequencies } \
39.99 \text { and less } & 12 & 14.56 \
40 - 59.99 & 18 & 20.365 \
60 - 79.99 & 15 & 12.28 \
80 \text {-and higher } & 5 & 2.795
\end{array}$$ It is desired to test whether these measurements came from a normal population.
-Calculate the value of the chi-square test statistic?

Quizplus · Accepted Answer

The Answer of Consider a set of 50 measurements with a mean of 50.2 and a standard deviation of 18.7 and with the following observed and expected frequencies. $$\begin{array} { l c c } 
\text { Interval } & \text { Observed Frequencies } & \text { Expected frequencies } \
39.99 \text { and less } & 12 & 14.56 \
40 - 59.99 & 18 & 20.365 \
60 - 79.99 & 15 & 12.28 \
80 \text {-and higher } & 5 & 2.795
\end{array}$$ It is desired to test whether these measurements came from a normal population.
-Calculate the value of the chi-square test statistic?

Consider a Set of 50 Measurements with a Mean of 50.2