Sa t-distribution appropriate? a sample with size has and . the dotplot for this sample is given below. a dotplot ranging from 5 to 11 with dots plotted as follows: 1 dot above 5, 2 dots above 6, 3 dots above 7, 3 dots above 8, 2 dots above 9, and 1 dot above 11. indicate whether or not it is appropriate to use the t-distribution.

For this case since the sample size is < 30 is appropiate use the t distribution.

Step-by-step explanation:

The t distribution (Student’s t-distribution) is a "probability distribution that is used to estimate population parameters when the sample size is small (n<30) or when the population variance is unknown".

The shape of the t distribution is determined by its degrees of freedom and when the degrees of freedom increase the t distirbution becomes a normal distribution approximately.  

The degrees of freedom represent "the number of independent observations in a set of data. For example if we estimate a mean score from a single sample, the number of independent observations would be equal to the sample size minus one."

Based on the info given we have these values:

5, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 11

And for this case we have n=12 representing the sample size.

For this case since the sample size is < 30 is appropiate use the t distribution.

We can calculate the sample mean and the deviation with the following formulas:

We can calculate the degrees of freedom like this:

And the standard error for the sample mean is given by:

answer: the dogs need to shift their focus to human scent.

its because the dogs being trained are for search and rescue thus they need to be able to track humans and their specific scent

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.