A test preparation company wants to test its claim about the consistency that it sees in test scores for its customers. Prior research has shown that the variance on the test is 20. The test company believes that its customers are more consistent in their scores than the general population. To test this, they sample 10 customers and find that they have a variance of 18. What is the value of the test statistic for their hypothesis test?

Suppose a population distribution is slightly positively skewed. The distribution of all sample means of size n taken from that population will be

A two-tailed test, when compared to a one-tailed test, is

The t distribution is used when

A curriculum coordinator for a school district is looking to adopt a district-wide reading curriculum for elementary students. The coordinator collects data from students at two different schools in the district. The week before statewide testing, he administered a survey to each student in the study that measured their opinion of the curriculum. He was interested in seeing if the perception of the curriculum differed between the two schools. He conducted an independent samples t-test, and his output is presented below. Interpret the output and answer the coordinator’s question (assume the normality assumption is satisfied).Answer: The results of the independent samples t-test showed that there ] a statistically significant difference in opinion of the curriculum between students at School A and School B. Students at School A had ] opinions of the curriculum compared to students at School B. The observed difference between the schools was ] points. Students’ opinions at each school differed by ] standard deviations, representing a ] effect of the curriculum.

Based on the evidence available, which of the following characteristics occurred first in human evolution?

Which of the following is a characteristic of all living things? Select all correct answers.

Multi-select question: Select all answers that are correct. During the exam, I am not allowed to

My BIOL 1125 instructor’s name is

The Alternative Minimum Tax (AMT) on US corporations implemented in 1986 tended to hit companies during recessions and after large capital investments, disincentivizing investment in plant and equipment. It was repealed as part of the 2017 TCJA due to these harmful effects and because it was costly for both taxpayers and the IRS to calculate and it raised little revenue.