ZuoTi.Pro
Question

For questions 5-8, suppose there is a test that consists of 100 multiple choice questions. You...

For questions 5-8, suppose there is a test that consists of 100 multiple choice questions. You have made a study guide for the test, and you are interested in whether the study guide makes any difference in test performance. You administer the test to a randomly selected group of 14 students who have looked at the study guide first (study guide group), and another randomly selected group of 12 students who have not looked at the study guide first (control group). The average score for the study guide group is 55.3, and the average score for the control group is 43.7. The standard error of the mean difference is 5.1. Assume normally distributed populations, etc. Use α = .05, two-tailed.

What is df in this scenario?

The critical values of t in this scenario are

What is the value of the t statistic in this scenario?

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

we have given an average score for the study guide group () = 55.3,

the average score for the control group = 43.7.

standard error = 5.1

the  df in this = 100-2 = 98

The critical values of t is 1.985 (from t table)

the value of the t statistic = = = 2.275

0 0
Add a comment
Know the answer?
Add Answer to:
For questions 5-8, suppose there is a test that consists of 100 multiple choice questions. You...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • For questions 5-8, suppose there is a test that consists of 200 multiple-choice questions. Each question...

    For questions 5-8, suppose there is a test that consists of 200 multiple-choice questions. Each question has five options, which meansthat people who answer the questions purely by guessing will get an average score of 40 (because they will guess correctly one fifth of the time, on average). You administer the test to a group of 31 students. The average score for the group of students is 37.3, and their standard deviation is 6.42. For the null hypothesis, let's assume...

  • The District of Columbia Opportunity Scholarship Program was created by Congress to provide tuition vouchers to...

    The District of Columbia Opportunity Scholarship Program was created by Congress to provide tuition vouchers to low-income parents who want their child to attend a private school. In 2012–2014, a treatment group of 995 students were randomly selected to receive a tuition voucher, while a control group of 776 students did not receive vouchers. One year later, the students were given a standardized reading test. The average score of the students in the treatment group was 601.78 with a standard...

  • Perform a one-tailed test. Set up H0 and Ha. Compute test statistic and p-value. Draw conclusions....

    Perform a one-tailed test. Set up H0 and Ha. Compute test statistic and p-value. Draw conclusions. For both questions. #1. A Gallup survey conducted April 2–11, 2018, found that 152 out of 1015 American adults mentioned immigration/illegal aliens as the most important problem facing the nation. An earlier survey conducted in February 2011 found that 108 out of 978 American adults mentioned immigration/illegal aliens as the most important problem facing the nation. Can we conclude that the percentage of all...

  • Perform a one-tailed test. Set up H0 and Ha. Compute test statistic and p-value. Draw conclusions....

    Perform a one-tailed test. Set up H0 and Ha. Compute test statistic and p-value. Draw conclusions. #1. A Gallup survey conducted April 2–11, 2018, found that 152 out of 1015 American adults mentioned immigration/illegal aliens as the most important problem facing the nation. An earlier survey conducted in February 2011 found that 108 out of 978 American adults mentioned immigration/illegal aliens as the most important problem facing the nation. Can we conclude that the percentage of all American adults who...

  • Perform a one-tailed test. Set up HO and Ha. Compute test statistic and p-value. Draw conclusions....

    Perform a one-tailed test. Set up HO and Ha. Compute test statistic and p-value. Draw conclusions. #1. A Gallup survey conducted April 2–11, 2018, found that 152 out of 1015 American adults mentioned immigration/illegal aliens as the most important problem facing the nation. An earlier survey conducted in February 2011 found that 108 out of 978 American adults mentioned immigration/illegal aliens as the most important problem facing the nation. Can we conclude that the percentage of all American adults who...

  • want to test the hypothesis that students who study one week before score greater than students...

    want to test the hypothesis that students who study one week before score greater than students who study the night before, giving you the following hypotheses: Null Hypothesis: H1 = H2, Alternative Hypothesis: H1 > H2. A random sample of 31 students who indicated they studied early shows an average score of 86.19 (SD = 4.358) and 35 randomly selected procrastinators had an average score of 84.58 (SD = 6.631). Perform a two independent samples t-test assuming that early studiers...

  • Suppose a new standardized test is given to 98 randomly selected third-grade students in New Jersey....

    Suppose a new standardized test is given to 98 randomly selected third-grade students in New Jersey. The sample average score Y on the test is 57 points, and the sample standard deviation, sy, is 10 points. The authors plan to administer the test to all third-grade students in New Jersey. The 95% confidence interval for the mean score of all New Jersey third graders is ( 55.02, 58.98 ). (Round your responses to two decimal places.) Suppose the same test...

  • plz help with all questions 180-2100 I. Multiple-choice (Circle the letter of your answer): = 100...

    plz help with all questions 180-2100 I. Multiple-choice (Circle the letter of your answer): = 100 and (1) For a continuous random variable 1, the population mean and standard deviation are o 20 respectively. the mean jy and the standard deviation og of the sample mean for a random sample of 16 items from this population are ( 5 0.05) (A) Pa = 25, ; 20 (B) P = 100, -20 (C) = 25,0 = 5 (D) Hg = 100,...

  • Could you tell me what kind of test to use for this data, the MD, DF,...

    Could you tell me what kind of test to use for this data, the MD, DF, SSD, t value, t critical, the standard error of the difference and estimated standard error of the difference? Thank you! A study was conducted to investigate the effectiveness of hypnotism in reducing pain. Results for randomly selected subjects are shown in the table below. A lower score indicates less pain. The “before” value is matched to an “after” value and the differences are calculated....

  • It is reported in USA Today that the average flight cost nationwide is $458.78. You have...

    It is reported in USA Today that the average flight cost nationwide is $458.78. You have never paid close to that amount and you want to perform a hypothesis test that the true average is actually less than $458.78. The hypotheses for this situation are as follows: Null Hypothesis: μ ≥ 458.78, Alternative Hypothesis: μ < 458.78. You take a random sample of national flight cost information and perform a one sample mean hypothesis test. You observe a p-value of...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT