Question

2.  Consider the following data set which gives the scores of librarians on an unstandardized test of...

2.  Consider the following data set which gives the scores of librarians on an unstandardized test of introversion.  Are their introversion scores greater than 13.50?

11 15 18 12 21 24 10 14 16 17 18 22

a.  State the null and alternative hypotheses.

b.  Find your critical value(s).  Draw the appropriate picture.

c.  Compute the test statistic (Show all your work).  

d.  Compare it to the appropriate critical value and make your conclusion.

e.  Compute the effect size

f.  Write up a results section for your finding, following the example format from class

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1


0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. An unstandardized test of aggression has a mean of 35.19. You take a sample of...
1. An unstandardized test of aggression has a mean of 35.19. You take a sample of 44 video game players and find their scores on this test have a mean of 39.84 and a standard deviation of 12.42. Are their aggression scores greater than the standard of 35.19? a. State the null and alternative hypotheses. b. Find your critical value(s) with a criterion of .01. Remember if the appropriate line is not available exactly in the table to pick the...
Consider the following sample data and hypotheses. Assume that the populations are normally distributed with equal...
Consider the following sample data and hypotheses. Assume that the populations are normally distributed with equal variances. Sample Mean1 = 57                    s1 = 21.5            n1 = 22 Sample Mean2 = 43                    s2 = 15.2            n2 = 18 a. Construct the 90% Confidence Interval for the difference of the two means. H0:  μ1 – μ2 = 5                        HA:  μ1 – μ2 ≠ 5 b. Using the hypotheses listed above, conduct the following hypothesis test steps. Following the “Roadmap for Hypothesis Testing”,...
Two sample Dependent t-test (or Paired t-test) You want to test your hypothesis below: There is...
Two sample Dependent t-test (or Paired t-test) You want to test your hypothesis below: There is a difference in mean test scores between Exam 1 and Exam 2             Provide your answers in the template below the data set. Exam 1 Exam 2 17 19 18 20 16 22 18 24 12 10 20 25 18 20 20 22 20 21 22 23 20 20 10 10 8 12 12 14 16 12 16 20 18 22 20 24 18...
The following output comes from regression using the actual HW9 scores and the test scores from...
The following output comes from regression using the actual HW9 scores and the test scores from an introductory class taught three years ago. Sample size: 48 R (correlation coefficient) = 0.4961 R-sq = 0.24614276 Estimate of error standard deviation: 14.458866 Parameter estimates: Parameter Estimate Std. Err. DF T-Stat P-Value Intercept 47.97618 5.5324807 46 8.671731 <0.0001 Slope 0.3491367 0.090088144 46 3.8755014 0.0003 Statistical Hypotheses: Alpha level: Critical value of z: Conclusion regarding the null: Conclusion in context of the situation: Everybody...
The Central Limit Theorem holds. The following table gives pre and post test scores for boys...
The Central Limit Theorem holds. The following table gives pre and post test scores for boys and girls in a drivers ed class. Boys Pre-Test Boys Post Test Girls Pre-Test Girls Post Test 45 63 55 75 57 75 62 88 71 82 66 85 66 90 59 93 62 92 72 70 58 78 69 93 63 94 70 89 60 90 64 74 Try to show the boys pre-test population mean is significantly less than 65. Let =...
1.Windy manger gives each of its employees an aptitude test. The scores on the test are...
1.Windy manger gives each of its employees an aptitude test. The scores on the test are normally distributed with a mean of 75 and a standard deviation of 12. A simple random sample of 144 is taken from an infinite population. What is the probability that the average aptitude test in the sample will be between 72.5 and 77.5? (show all calculations; round to second decimal place) 2. A study found that, in year 2010, 59% of first-time, full-time college...
A random sample of 10 student nurses received the following scores on a test of authoritarianism:...
A random sample of 10 student nurses received the following scores on a test of authoritarianism: 113, 90,85,100,115,95,108,124,120,104. Perform an exact test to see whether the median score for the population of student nurses is more than 100? Write down appropriate hypotheses, test statistic, p-value and conclusion.
A teacher gives a reading skills test to a third-grade class of n = 41 children...
A teacher gives a reading skills test to a third-grade class of n = 41 children at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of the year. Their test scores showed an average improvement of MD =4.9 points with s 2 = 82. A. Are the results sufficient to conclude that there is significant improvement in children’s reading skills? Use a one-tailed test with α...
The following data is the math test scores of students graduating from a particular high school...
The following data is the math test scores of students graduating from a particular high school . The government uses these scores to determine if there will be accreditation awarded. In order for this to occur the mean score must be above 780. A sample of students scores is drawn at random and they take the test. The scores are in the following table and the population is considered a normal distribution.   Test at the .01 level. 980 764 798...
A standardized test is given to an eighth grade class and a ninth grade class. The...
A standardized test is given to an eighth grade class and a ninth grade class. The superintendent believes that the variance in performance from the eighth grade class is smaller than the variance in performance from the ninth grade class. The sample variance of a sample of 15 test scores from the eighth grade class is 31.01. The sample variance of a sample of 21 test scores from the ninth grade class is 34.54. Test the claim using a 0.005...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT