ZuoTi.Pro
Question

You are interested in whether a study intervention significantly improves students’ grades on a statistics exam....

You are interested in whether a study intervention significantly improves students’ grades on a statistics exam. You recruit a sample of 36 students from a normally distributed population with μ = 75 and σ = 7.5. You chose an alpha level of .05 and perform a one-tailed hypothesis test. After participating in the study intervention, the students’ statistics exam average is 79. What would be the correct way to write out the alternative hypothesis (H1)?

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

0 0
Add a comment
Know the answer?
Add Answer to:
You are interested in whether a study intervention significantly improves students’ grades on a statistics exam....
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

  • A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete...

    A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete a reading comprehension task before and after a six-week speed reading course. In the beginning of the study, a randomly selected group of B1 students scored an average of 102 points on the reading comprehension task. Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M_D is normal. He plans to use a repeated-measures t-test....

  • A researcher in interested in whether students who are musicians have higher intelligence test sc...

    A researcher in interested in whether students who are musicians have higher intelligence test scores than students in the general population. The mean for the general population is 100. The researcher selects musicians from local high schools and gives them an intelligence test, with a mean of 105. SS 725 for the 2. 30 sample Null Hypothesis (Ho): μ State in words: Alternative Hypothesis (Ha): μ > State in words: df= t critical value (with α : .05): One-tailed or...

  • 7) A retired statistics professor has recorded final exam results for decades. The mean final exam...

    7) A retired statistics professor has recorded final exam results for decades. The mean final exam score for the population of her students is 82.4 with a standard deviation of 6.5 . In the last year, her standard deviation seems to have changed. She bases this on a random sample of 25 students whose final exam scores had a mean of 80 with a standard deviation of 4.2 . Test the professor's claim that the current standard deviation is different...

  • Question 1 FLAG QUESTION In a study to investigate whether pet therapy improves exam scores, students...

    Question 1 FLAG QUESTION In a study to investigate whether pet therapy improves exam scores, students who interacted with a therapy pet scored higher than students who did not. Which of the following is closest to describing what 'internal validity' refers to for this study? Answers A-D A the confidence that improved exam scores were attributed to the pet therapy, B the confidence that results of the study can be generalized to other students taking an exam. C experts having...

  • A statistics professor gave an exam on performing the T-Test with σ unknown. The exam had...

    A statistics professor gave an exam on performing the T-Test with σ unknown. The exam had the bonus question "Guess the average score on this final exam. If a T-Test is performed and the mean guess for the class is not significantly different from the true average exam score, everyone in the class will then receive two bonus points." There were 10 students that took the final exam. The true average exam score was 89.3. The professor conducts a one-mean...

  • 5) We ask whether a new version of a textbook impacts students learning of statistics. On...

    5) We ask whether a new version of a textbook impacts students learning of statistics. On a national statistic exam students using the old textbook score 68.5. A sample of students using the new textbook have the following scores: 64           69           92           77           71    82           74           69           88 a) What is the sample mean? 5b) What is the sample standard deviation? 5c) What is H0 and H1 for this study? 5d) Compute tobt 5d) Compute tobt 5f) What do you conclude about the use of this book...

  • 3. Exam grades across all students across all sections of an introductory statistics class are approximately...

    3. Exam grades across all students across all sections of an introductory statistics class are approximately normally distributed with a mean of 72 and a standard deviation of 11. Use the normal distribution to find answer the following questions. a. What percent of students scored above a 90%? b. What percent scored below 60%? c. If the lowest 5% of students will be required to attend an extra study session, what grade is the cutoff for being required to attend...

  • What is the relationship between the amount of time statistics students study per week and their...

    What is the relationship between the amount of time statistics students study per week and their final exam scores? The results of the survey are shown below. Time 12 0 3 14 14 9 0 13 10 Score 95 60 73 85 86 89 65 97 93 Find the correlation coefficient: r=r=    Round to 2 decimal places. The null and alternative hypotheses for correlation are: H0:H0: ? μ ρ r  == 0 H1:H1: ? ρ μ r   ≠≠ 0 The p-value is:    (Round...

  • What is the relationship between the amount of time statistics students study per week and their...

    What is the relationship between the amount of time statistics students study per week and their final exam scores? The results of the survey are shown below. Time Score 3 67 13 95 6 15 77 89 13 100 3 66 7 63 11 79 1 59 a. Find the correlation coefficient: r = Round to 2 decimal places. b. The null and alternative hypotheses for correlation are: Ho: ? D = 0 H: ? *0 The p-value is: (Round...

  • You are interested in whether students that have a male instructors perform differently on exams. To...

    You are interested in whether students that have a male instructors perform differently on exams. To investigate this, you gather a sample of 5 students that have a male instructor and compare their exam average to the average of all instructors.  The data are below: Male Instructors All Instructors x ̅=74.5 µ=76.8 s = 7.62 Do you reject or fail to reject your null hypothesis? Reject the null hypothesis Fail to reject the null hypothesis

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