# QNT 275 Final Exam 2017 – Multiple Choice Study Guide

**A quantitative variable is the only type of variable that can:**

assume numeric values for which arithmetic operations make sense

Explanation: Quantitative values are numeric, while qualitative are labels, therefore, they are the only type that can perform arithmetic operations.

**A qualitative variable is the only type of variable that:**

cannot be measured numerically

Explanation: Qualitative variables are labeled responses, such as opinions on a certain topic taken via a survey.

**The null hypothesis is a claim about a:**

population parameter, where the claim is assumed to be true until it is declared false

TIP: Learn about hypothesis testing and errors here. There is never a 100% certain hypothesis test, so it is critical to understand how errors can affect the outcome and usability of a clinical study.

**The alternative hypothesis is a claim about a:**

population parameter, where the claim is assumed to be true if the null hypothesis is declared false

**In a one-tailed hypothesis test, a critical point is a point that divides the area under the sampling distribution of a:**

statistic into one rejection region and one nonrejection region

**In a two-tailed hypothesis test, the two critical points are the points that divide the area under the sampling distribution of a:**

** **statistic into two rejection regions and one nonrejection region

**In a hypothesis test, a Type I error occurs when:**

a true null hypothesis is rejected

**In a hypothesis test, a Type II error occurs when:**

a false null hypothesis is not rejected

**In a hypothesis test, the probability of committing a Type I error is called the:**

significance level

**Student:**Lonny McDowell**Textbook:**QNT 275 Statistics Fundamentals**Course:**QNT 275 Final Exam 2017

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