A group of 225 student needs to be arranged in a square formation for a halftime performance show
2 answers:
Answer:
15 students should be lined up in each row.
Step-by-step explanation:
A group of 225 student needs to be arranged in a square formation.
This means same number of students will sit in each row as in each column.
To find this we will take the square root of 225.
There will be = students in each rows and columns.
Therefore, 15 students should be lined up in each row.
You might be interested in
Answer:
Null and alternative hypothesis
Test statistic
P-value
The null hypothesis is rejected.
It is concluded that the proportion of households tuned into the program is less than 25%. The claim of the advertiser is rigth and got statistical support.
Step-by-step explanation:
We have to perform a hypothesis test of a proportion.
The claim is that less than 25% were tuned into the program, so we will state this null and alternative hypothesis:
The signifiance level is 0.01.
The sample has a proportion p=0.1 and sample size of n=6000.
The standard deviation of the proportion, needed to calculate the test statistic, is:
The test statistic is calculated as:
As this is a one-tailed test, the P-value is P(z<-26.82)=0. The P-value is smaller than the significance level (0.01), so the effect is significant.
Since the effect is significant, the null hypothesis is rejected. It is concluded that the proportion of households tuned into the program is less than 25%. The claim of the advertiser is rigth and got statistical support.