FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 12: Univariate Statistical Analysis: a Recap of Inferential Statistics

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 1

True/False

Review LaterAdd Note

Review Later

A way to eliminate the sign problem caused by the negative deviations cancelling out the positive deviations is to square the deviation scores.

Correct Answer

verified

Show Answer

Question 2

Multiple Choice

Review LaterAdd Note

Review Later

Suppose that a group of 100 consumers are asked to rate how much they liked the taste of a new soft drink on a 5-point scale (where 5 = good taste and 1 = poor taste) . The mean rating was 4.6, with a standard deviation of 1.25. Suppose, further, that the standard error of the mean for this study was 0.15. If you wanted to find the 95 per cent confidence interval (two-tailed test) , and if the Z-value at the .05 level of significance is 1.96, then the confidence interval lies between approximately:

A) 4.45 and 4.75.
B) 4.31 and 4.89.
C) 4.36 and 4.85.
D) 4.57 and 4.63.

Correct Answer

verified

Show Answer

Question 3

True/False

Review LaterAdd Note

A normal distribution has a mean of zero and a standard deviation of one.

Testing a hypothesis about a mean requires nominal- or ordinal-scaled data.

The median is the preferred measure of central tendency when the data is ordinal-scaled.

Failing to reject the null hypothesis when the alternative hypothesis is true is known as a:

Which of the following test allows to test for significance in the analysis of frequency distribution?

Conducting analysis with more than two variables simultaneously is known as:

If the standard deviation for a sample of 225 consumers is 20, then the standard error of the mean for this sample is approximately:

The range is useful for describing the sample variability.

Which of the following statements about the t-distribution is not true?

The t-distribution should be used when the sample size is large (n > 30) and the population standard deviation is unknown.

The long-run relative frequency with which an event will occur is called central tendency.

One method of calculating how far any observation is from the mean is to calculate individual deviation scores.

The critical probability of choosing between the null hypothesis and the alternative hypothesis is called the:

Which of the following do not influence sample size?

Making the assumption that the population distribution is normal is generally appropriate when data are ordinal.

Parametric statistical procedures are most appropriate when the data are nominal-scaled.

Sample size can help to control both Type I and Type II errors.

Parametric statistical tests are based on the assumption that the data is drawn from a population with a(n) ______ sampling distribution.