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SASA Quiz #2

Authored by Kristian Ollier

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SASA Quiz #2
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

You got a p-value of 0.09. What conclusion can you derive?

This is statistically significant at the 95% and 99% confidence levels.

This is statistically significant at the 90% significance level and insignificant at 95% significance level.

This is statistically insignificant at the 95% significance level.

This is statistically significant at the 99% significance level.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

  1. Suppose data from a demographic survey indicated that the mean height of Europeans is 69.9 inches with a standard deviation of 2.8 inches. Meanwhile, suppose that the mean height of Asians is 63.7 inches with a standard deviation of 2.7. Suppose further that the height of a Spanish professional tennis player is 72.8 inches, and the height of a Japanese professional tennis player is 70.7 inches. What conclusion can be inferred from the given information?

  1. The Japanese player is taller than the Spanish player.

The Spanish and Japanese players have the same heights.

  1. The Spanish player is taller than the Japanese player.

  1. The heights are incomparable due to their different nationalities. 

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

  1. The average grade on a statistics test was 78 with a standard deviation of 8. Assume that test scores are normally distributed. What is the probability that a student gets a score more than 80?

  1. 0.0122

  1. 0.4013 Use standard z table or =NORMSDIST().

  1. 0.9878

  1. 0.5865

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

  1. Which of the following will lead to the rejection of the null hypothesis?

  1. The p-value is 0.05 for a 99.9% confidence level.

  1. The z test statistic is less than the critical value under a one sample test of population means.

  1. The t test statistic is greater than the critical value under a one sample test of population means.

  1. The significance level is greater than the test statistic. 

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

  1. What does it mean when the p-value is 0.000?

  1. We have all the evidence to reject the null hypothesis.

  1. We have no evidence to reject the null hypothesis.

  1. We have some evidence to reject the null hypothesis

We have all the evidence to accept the null hypothesis.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Because the primary goal of inferential statistics is to generalize from a population to a sample, the larger the sample size, the better.

TRUE

FALSE

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A hypothesis is a statement about the population that must be tested using a sample.

TRUE

FALSE

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