Question

An education publication claims that the mean score for grade 10 students on a science achievement...

An education publication claims that the mean score for grade 10 students on a science achievement test is more than 669. You randomly select 38 grade 10 test scores. At a=0.1, can you support the publications claim? Assume the the sample mean is 662.3, the population standard deviation is 43.3, and the scores are normally distributed.
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
The scores of fourth grade students on a mathematics achievement test follow a normal distribution with...
The scores of fourth grade students on a mathematics achievement test follow a normal distribution with a mean of 75 and standard deviation of 4. What is the probability the sample mean score of 64 randomly selected students is between 74 and 76?
) The mean ACT mathematics score for 60 randomly selected high school students is 20.6. Assume...
) The mean ACT mathematics score for 60 randomly selected high school students is 20.6. Assume the population standard deviation is 5.4. The mean ACT science score for 75 other randomly selected high school students is 20.8. Assume the population standard deviation is 5.6. At ? = 0.01, can you reject the claim that the ACT math and ACT science scores are equal? a.) Verify that 1.) Both population standard deviations are known. _____ 2.) The samples taken are random....
TIMSS 2003 (Trends in International Mathematics and Science Study) focused on the mathematics and science achievement...
TIMSS 2003 (Trends in International Mathematics and Science Study) focused on the mathematics and science achievement of eighth-graders throughout the world. A total of 45 countries (including the United States) participated in the study. The mean math exam score for U.S. students was 514 with a standard deviation of 92. Assume the scores are normally distributed and a sample of 153 students is taken. (Give your answers correct to four decimal places.) (a) Find the probability that the mean TIMSS...
Two teaching methods and their effects on science test scores are being reviewed. A random sample...
Two teaching methods and their effects on science test scores are being reviewed. A random sample of 13 students, taught in traditional lab sessions, had a mean test score of 74 with a standard deviation of 5.5. A random sample of 15 students, taught using interactive simulation software, had a mean test score of 87.9 with a standard deviation of 6.5. Do these results support the claim that the mean science test score is lower for students taught in traditional...
The Ministry of Education estimates that the SAT scores of students in United States are normally...
The Ministry of Education estimates that the SAT scores of students in United States are normally distributed with mean 550 and standard deviation of 30. a) Find the threshold value of SAT score where 10% of all students are above it. b) Suppose that a sample of 60 students is randomly selected from United States population, and the sample is normally distributed, what is the probability that the mean SAT score of the sample of students is above 553?
An SAT prep course claims to improve the test score of students. The table below shows...
An SAT prep course claims to improve the test score of students. The table below shows the scores for seven students the first two times they took the verbal SAT. Before taking the SAT for the second time, each student took a course to try to improve his or her verbal SAT scores. Do these results support the claim that the SAT prep course improves the students' verbal SAT scores? Let d=(verbal SAT scores prior to taking the prep course)−(verbal...
A 95% confidence interval for the mean trading achievement score for a population of third grade...
A 95% confidence interval for the mean trading achievement score for a population of third grade students is (44.2, 54 2). Suppose you compute a 99% confidence interval using the same information. Which of the following statements are correct? The intervals have the same width The 99 percent interval is shorter The 99 percent interval is longer Answer can't be determined None of the above
An SAT prep course claims to improve the test score of students. The table below shows...
An SAT prep course claims to improve the test score of students. The table below shows the scores for seven students the first two times they took the verbal SAT. Before taking the SAT for the second time, each student took a course to try to improve his or her verbal SAT scores. Do these results support the claim that the SAT prep course improves the students' verbal SAT scores? Let d=(verbal SAT scores prior to taking the prep course)−(verbal...
Students taking a standizedvIQ test had a mean score of 100 with a standard deviation of...
Students taking a standizedvIQ test had a mean score of 100 with a standard deviation of 15. Assume that the scores are normally distributed. a) Find the probaility that a student had a score less than 95. b) If 2000 students are randomly selected, how many would be expected to have an IQ score that is less than 90? c) What is the cut off score that would place a student in the bottom 10%? d) A random sample of...
A principal claims the students in his school have above-average test scores for a particular standardized...
A principal claims the students in his school have above-average test scores for a particular standardized test. A sample of 50 students from his school were found to have an average test score of 77.2. The population mean for test scores for this particular test is 75, with a standard deviation of 9 (so we can assume that the population test score is normally distributed). Set up a hypothesis test to determine whether this principal’s claim is correct (use alpha...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT