A sports equipment researcher investigated how different types of wood used to make baseball bats might affect batting. The researcher selected a sample of 80 batters from summer baseball leagues and randomly assigned the batters to one of two groups: the ash bat group or the maple bat group. The mean number of hits for each group was recorded at the end of the season, and the difference in the sample means was calculated. Which of the following is the appropriate inference procedure for analyzing the results of the investigation? A. A one-sample t-interval for a population mean
B. A one-sample t-interval for a sample mean
C. A matched pairs t-interval for a mean difference
D. A two-sample t-interval for a difference between sample means
E. A two-sample t-interval for a difference between population means

The inference procedure for analyzing the investigation result is;

B. A one-sample t-interval for a sample mean

Step-by-step explanation:

A t-test is used to find or compare the significant difference between the mean of two samples, to determine if difference is significant statistically or if the difference is due to chance

A statistician can also verify if there is a difference between two means by making a comparison of the confidence intervals of the two samples

 Whereby there is an overlap in the confidence interval of the two samples then there is no significant difference in the mean of the two samples

However, if the confidence interval of the two samples do not overlap, there is a difference in the mean of the group

The appropriate method for analyzing the result of the investigation is a one-sample t-interval for sample mean

E  

A two-sample  t -interval for a difference between population means

Step-by-step explanation:

i just took the test

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

the answer is 13 cm