Question

3) A school administrator claims that the standard deviations of math assessment scores for 8th grade...

3) A school administrator claims that the standard deviations of math assessment scores for 8th grade students are the same in Districts 3 and 4. A random sample of 12 scores in District 3 had a standard deviation of 36.8 points and a random sample of 14 scores in District 4 had a standard deviation of 32.5 points. At ? = 0.10, what can be said about the administrator’s claim? Assume the populations are normally distributed and complete all seven steps.

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

Homework Answers

Answer #1

***If you have any doubt regarding the problem please write it in the comment section.if you are satisfied please give me a LIKE if possible...

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
A random sample of 86 eighth grade students’ scores on a national mathematics assessment test has...
A random sample of 86 eighth grade students’ scores on a national mathematics assessment test has a mean score of 294. This test result prompts a state school administrator to declare that the mean score for the state’s eighth graders on this exam is more than 285. Assume the population standard deviation is 35. At the 3 % level of significance, is there enough evidence to support the administrator’s claim?
An administrator claims that the average test scores between two instructors at a school are different....
An administrator claims that the average test scores between two instructors at a school are different. In a sample of 28 students from the first instructor’s class, the average test score was 32 out of 50 points with a standard deviation of 5 points. In a sample of 33 students from the second instructor’s class, the average was 29 out of 50 with a standard deviation of 6 points. Assuming both populations are normally distributed and the population variances are...
26. The scores on a standardized math test for 8th grade children form a normal distribution...
26. The scores on a standardized math test for 8th grade children form a normal distribution with a mean of 80 and a standard deviation of 10. (8 points) a. What proportion of the students have scores less than X = 83? b. If samples of n = 6 are selected from the population, what proportion of the samples have means less than M = 83? c. If samples of n = 30 are selected from the population, what proportion...
If a school district takes a random sample of 81 Math SAT scores and finds that...
If a school district takes a random sample of 81 Math SAT scores and finds that the average is 486, and knowing that the population standard deviation of Math SAT scores is intended to be 100. Find a 99% confidence interval for the mean math SAT score for this district. ? ≤ μ≤ ≤ If a school district takes a random sample of 81 Math SAT scores and finds that the average is 486, and knowing that the population standard...
(1 point) Scores on a national 8th grade reading test are normally distributed with a mean...
(1 point) Scores on a national 8th grade reading test are normally distributed with a mean of 130 and a standard deviation of 20. Find: (a) the probability that a single test score selected at random will be greater than 158: 0.080756659 (b) the probability that a random sample of 48 scores will have a mean greater than 132: 0.30724 (c) the probability that a random sample of 45 scores will have a mean greater than 132: (d) the probability...
A math teacher claims that she has developed a review course that increases the scores of...
A math teacher claims that she has developed a review course that increases the scores of students on the math portion of a college entrance exam. Based on data from the administrator of the​ exam, scores are normally distributed with mu equalsμ=517517. The teacher obtains a random sample of 18001800 ​students, puts them through the review​ class, and finds that the mean math score of the 18001800 students is 523523 with a standard deviation of 116116. Complete parts​(a) through​ (d)...
A random sample of 84 eighth grade​ students' scores on a national mathematics assessment test has...
A random sample of 84 eighth grade​ students' scores on a national mathematics assessment test has a mean score of 294. This test result prompts a state school administrator to declare that the mean score for the​ state's eighth-graders on this exam is more than 285. Assume that the population standard deviation is 31. At α = 0.10​, is there enough evidence to support the​ administration's claim? Write out the hypotheses statements below and identify the parameter of interest. Ho...
The Trial Urban District Assessment (TUDA) is a government sponsored study of student achievement in large...
The Trial Urban District Assessment (TUDA) is a government sponsored study of student achievement in large urban school districts. TUDA includes a reading test score from 0 to 500, with a score of 254 considered a “basic” reading level and a score of 292 considered “proficient”. Reading test scores for a random sample of 80 eighth graders in the Dallas school district had a sample mean of 259, with a sample standard deviation of 37.4. a) Based on this sample...
A certain high school requires all students to take the SAT. The SAT MATH scores of...
A certain high school requires all students to take the SAT. The SAT MATH scores of students at this high school had a normal distribution with a mean of 537.8 points and standard deviation of 25 points. In a Simple Random Sample of 31 students from this high school, what is the probability that the sample mean x¯ is 542 or higher? Commute times (in minutes) for drivers in a large city have a mean of 58.3 minutes and a...
In a recent year, grade 6 Michigan State public school students taking a mathematics assessment test...
In a recent year, grade 6 Michigan State public school students taking a mathematics assessment test had a mean score of 303.1 with a standard deviation of 36. Possible test scores could range from 0 to 1000. Assume that the scores were normally distributed. a. Find the probability that a student had a score higher than 295. b. Find the probability that a student had a score between 230 and 305. c. What is the highest score that would still...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT