72 students who struggle in math classes at a large university were selected to participate in a study. The university is hoping that an intervention program will help these students. 33 students were randomly assigned to an intervention to address their struggles while the rest received no intervention. The mean score on an assessment taken after the intervention for those in the intervention group was 82.4 points with a standard deviation of 5.2 points while the mean score on the same assessment for those not receiving the intervention was 79.8 points with a standard deviation of 7.3 points. Let µ1 receiving the intervention and U2 = the true mean score for all students like these not receiving the intervention. = the true mean score for all students like these What is the standardized test statistic and P-value for conducting a significance test of µ1 – µ2? You may assume the conditions have been met.

72 students who struggle in math classes at a large university were selected to participate in a study. The university is hoping that an intervention program will help these students. 33 students were randomly assigned to an intervention to address their struggles while the rest received no intervention. The mean score on an assessment taken after the intervention for those in the intervention group was 82.4 points with a standard deviation of 5.2 points while the mean score on the same assessment for those not receiving the intervention was 79.8 points with a standard deviation of 7.3 points. Let µ1 receiving the intervention and U2 = the true mean score for all students like these not receiving the intervention. = the true mean score for all students like these What is the standardized test statistic and P-value for conducting a significance test of µ1 – µ2? You may assume the conditions have been met.

Name: 72 students who struggle in math classes at a large university were s
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: 72 students who struggle in math classes at a large university were selected toparticipate in a study. The university is hoping that an intervention program will helpthese students. 33 students were randomly assigned to an intervention to addressthe

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

2. Subscribers to a local newspaper were asked whether they regularly, occasionally, or never read the business section and also whether they had traded common stocks over the last year. The following table indicates the proportions of subscribers in six joint classifications. Traded Stocks Yes No Read Business section Regularly Occasionally Never 0.18 0.04 0.16 0.31 0.21 (a) What is the probability that a randomly chosen subscriber never reads the business sec- tion? (a) 25% (b) What is the probability that a randomly chosen subscriber has traded stocks over the last year? (b) 32% (c) What is the probability that a randomly chosen subscriber traded stocks and never read the business section? (c) 4% (d) What is the probability that a subscriber traded stocks, if he never read the bussiness section? (d) 16% (e) What is the probability that a subscriber never reads the business section, if the traded stocks? (e) 12.5%
Logan and Brian began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Logan took a test in Art History and earned a 76.8, and Brian took a test in English and earned a 68.9. Use the fact that all the students' test grades in the Art History class had a mean of 71.9 and a standard deviation of 11.6, and all the students' test grades in English had a mean of 61 and a standard deviation of 9.4 to answer the following questions.a) Calculate the z-score for Logan's test grade.z=z= [Round your answer to two decimal places.] b) Calculate the z-score for Brian's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Logan Brian They did equally well.
Lucille, Rocio, and Cristina are all taking College Mathematics but from different professors. They all recently took a statistics exam and the exam scores were normally distributed in each of their classes. • Lucille's class had an average grade of 78 and the standard deviation was 7. Lucille earned 83.95 on the exam. • Rocio's class had an average grade of 82 and the standard deviation was 3. Rocio earned 86.5 on the exam. • Cristina's class had an average grade of 76 and the standard deviation was 4. Cristina earmed 82.8 on the exam. Since some professors give harder exams than others, these students decided to use statistics to figure out who did the best on their exam. Use the Cumulative Z-Score Table to answer the following questions. Write your answers as a percent with two decimal places. Hint • Lucille's score places her above % of her class. • Rocio's score places her above % of her class. • Cristina's score places her above % of her class.
The honors program at Brad's university only accepts students with an entrance exam score over 400. What percentage of students would be eligible if the students at Brad's school have an average exam score of 250, with a standard deviation of 80?
Salma recently switched her primary doctor to one specializing in caring for elderly patients. On her new doctor's website, it says that the mean systolic blood pressure among elderly females is 115 millimeters of mercury (mmHg). Salma believes the value is actually higher. She bases her belief on a recently reported study of 21 randomly selected, elderly females. The sample mean systolic blood pressure was 118 mmH, and the sample standard deviation was 21 mmHg. Assume that the systolic blood pressures of elderly females are approximately normally distributed. Based on the study, at the 0.10 level of significance, can it be concluded that y, the population mean systolic blood pressure among elderly females, is greater than 115 mmHg? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.)
... ... ... ..
Christin ently switched her primary doctor to one specializing in caring for elderly patients. On her new doctor's website, it says that the mean systolic blood pressure among elderly females is 115 millimeters of mercury (mmHg). Christine believes the value is actually higher. She bases her belief on a recently reported study of 14 randomly selected, elderly females. The sample mean systolic blood pressure was 129 mmHg, and the sample standard deviation was 22 Español mmHg. Assume that the systolic blood pressures of elderly females are approximately normally distributed. Based on the study, at the 0.05 level of significance, can it be concluded that u, the population mean systolic blood pressure among elderly females, is greater than 115 mmHg? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H and the alternative hypothesis H . H, :0…
There are many ways to measure the reading ability of children. One frequently used test is the DRP or Degree of Reading Power. The national average score in DRP test is 32. We want to determine if there is sufficient evidence at the 5% level to suggest that the mean score of all third graders in YOUR district is higher than the national mean. The DRP scores for a simple random sample of 41 third graders in that suburban school in YOUR district yielded a mean of 35.2. Assume that the population of DRP scores of third graders in that suburban school district are normally distributed with a population std.dev of 11.
A machine used to fill gallon-sized paint cans is regulated so that the amount of paint dispensed has a mean of 128 ounces and a standard deviation of 0.40 ounce. You randomly select 45 cans and carefully measure the contents. The sample mean of the cans is 127.9 ounces. Does the machine need to be reset? Explain your reasoning. it is that you would have randomly sampled 45 cans with a mean equal to 127.9 ounces, because it within the range of a usual event, namely within of the mean of the sample means.
A survey found that the mean commute time is 25.4 minutes for the fifteen largest U.S. cities.The Austin, TX, chamber of commerce feels that Austin's commute time is less. A survey of 25 randomly selected commuters had a mean of 22.1 minutes with a standard deviation of 5.3minutes. At the 10% level, does the survey data suggest that Austin commute time is significantly less than the national average?Your answer should have the following: 1). Significance Level: Alpha =2). Sample Size: n = 3). Sample X =
A college admissions officer believes that students enrolling from Shawnee school District have higher SAT scores than those who enroll from West River School District. A sample of 30 students from each district is selected. The average SAT score for the group from the Shawnee district is 656 with a standard deviation of 100. The average SAT score for the group from the West River district is 560 with a standard deviation of 90. Is the belief of the admissions officer substantiated?