The attention span of kindergarteners are measured in minutes.A teacher wants to see if there are differences in the attention span of kindergarteners at different times of day.Using a sample of five such children, their attention spans are measured at five different times throughout the day.Using the data in the table below and an alpha of 0.05, what is the null hypothesis? $$\begin{array} { l c c c c c }
& 9 \text { am } & 11 a m & \text { nown } & 1 p m & 3 p m \
\text { Child 1 } & 12 & 5 & 10 & 7 & 8 \
\text { Child 2 } & 10 & 6 & 9 & 8 & 12 \
\text { Child 3 } & 7 & 10 & 6 & 8 & 13 \
\text { Child 4 } & 11 & 8 & 5 & 4 & 10 \
\text { Child 5 } & 12 & 4 & 11 & 5 & 8
\end{array}$$
A)The attention span between the children is equal.
B)The attention span between the times of day are equal.
C)The attention span differs based on time of day.
D)The attention span between the times of day are equal by child.
E)The attention span is dependent on the child.

Question

The attention span of kindergarteners are measured in minutes.A teacher wants to see if there are differences in the attention span of kindergarteners at different times of day.Using a sample of five such children, their attention spans are measured at five different times throughout the day.Using the data in the table below and an alpha of 0.05, what is the null hypothesis? $$\begin{array} { l c c c c c } 
& 9 \text { am } & 11 a m & \text { nown } & 1 p m & 3 p m \
\text { Child 1 } & 12 & 5 & 10 & 7 & 8 \
\text { Child 2 } & 10 & 6 & 9 & 8 & 12 \
\text { Child 3 } & 7 & 10 & 6 & 8 & 13 \
\text { Child 4 } & 11 & 8 & 5 & 4 & 10 \
\text { Child 5 } & 12 & 4 & 11 & 5 & 8
\end{array}$$
A)The attention span between the children is equal.
B)The attention span between the times of day are equal.
C)The attention span differs based on time of day.
D)The attention span between the times of day are equal by child.
E)The attention span is dependent on the child.

Quizplus · Accepted Answer

The null hypothesis in an analysis of variance (ANOVA) test, which is likely being conducted here given the setup, typically states that there are no differences among the groups being compared. In this case, since the teacher wants to see if there are differences in attention span at different times of day, the null hypothesis would state that the attention spans are equal across these times.

The Attention Span of Kindergarteners Are Measured in Minutes A)The Attention Span Between the Children Is Equal