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1. A sample of freshmen took a reading comprehension test and their scores are summarized below....
You have a sample of 45 3rd graders who took a reading comprehension test before and...
You have a sample of 45 3rd graders who took a reading comprehension test before and after participating in a reading program. The scores on the reading comprehension test are then compared. What is the appropriate test to use? one-sample z-test two-sample t-test for dependent samples none of the above two-sample t-test for independent samples
A study of reading comprehension in children compared three methods of instruction. The three methods of...
A study of reading comprehension in children compared three methods of instruction. The three methods of instruction are called Basal, DRTA, and Strategies. Basal is the traditional method of teaching, while DRTA and Strategies are two innovative methods based on similar theoretical considerations. The READING data set includes three response variables (posttests) that the new methods were designed to improve. Analyze The Posttest 2 score using ANOVA. a. What is the response variable? Method of instruction Traditional teaching method Innovative...
A random sample of n - 16 scores is selecdted from a normal population with a...
A random sample of n - 16 scores is selecdted from a normal population with a mean of p - 50. After atreatment is administered to the individuals in the sample, the sample mean is found to be M -54 If the population standard deviation is σ-8, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α-.05. (Hint: Recall that the critical value for a two-tailed test with α-.05 is...
An educator believes that new reading activities for elementary school children will improve reading comprehension scores....
An educator believes that new reading activities for elementary
school children will improve reading comprehension scores. She
randomly assigns third graders to an eight-week program in which
some will use these activities and others will experience
traditional teaching methods. At the end of the experiment, both
groups take a reading comprehension exam. Their Scores are shown
below.
New Activities: 23, 34, 34, 34, 35, 37, 42, 43, 44, 46, 47, 48,
49, 55
Control: 12, 13, 22, 26, 29, 30,...
The scores on a test for a sample of 41 statistics students are summarized in the...
The scores on a test for a sample of 41 statistics students are summarized in the following table. Number of students Score 9 90 19 80 13 70 Find the mean score. Round your answer to at least one decimal place.
this is a single sample t test problem this is math Assignment #11 Single Sample t-Test...
this is a single sample t test problem
this is math
Assignment #11 Single Sample t-Test What factor determines whether you should use a z-test or a t-test statistic for a hypothesis test? 11.1 A sample is selected from a population mean of u 30. A treatment is administered to the individuals in the sample and, after treatment, the sample mean found to be M 11.2 = 31.3 with a sample variance of s2 9 If the sample consists of...
The table below shows the critical reading scores for 14 students the first two times they...
The table below shows the critical reading scores for 14 students the first two times they took a standardized test. At a 0.01, is there enough evidence to conclude that their scores improved the second time they took the test? Complete parts (a) through (f Student Score on first test Score on second test 415435631552 552 420 466 467 403 665 655 604 424 382 1 2 3 4 5 6 7 89 10 11 12 13 14 411 351...
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....
1. A population has a mean of 23. A sample of 4 is given an experimental...
1. A population has a mean of 23. A sample of 4 is given an experimental procedure and has scores of 20, 22, 22, and 20. Test the hypothesis that the procedure produces a lower score. Use the .05 significance level. Use the steps of hypothesis testing. t-test for Dependent Means (Chapter 7) 2. Five individuals are tested before and after an experimental procedure; their scores are given in the following table. Test the hypothesis that there is no change,...
please find mean AND standard deviation Reading scores. The grade-level reading scores from a reading test...
please find mean AND standard deviation
Reading scores. The grade-level reading scores from a reading test given to a random sample of 12 students in an urban high school graduating class are: 7 8 10 7 8 13 14 12 15 11 10 15 a. Find the mean of the reading scores (Type an integer or a decimal. Round to two decimal places.)
A random sample of n - 16 scores is selecdted from a normal population with a mean of p - 50. After atreatment is administered to the individuals in the sample, the sample mean is found to be M -54 If the population standard deviation is σ-8, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α-.05. (Hint: Recall that the critical value for a two-tailed test with α-.05 is...
An educator believes that new reading activities for elementary
school children will improve reading comprehension scores. She
randomly assigns third graders to an eight-week program in which
some will use these activities and others will experience
traditional teaching methods. At the end of the experiment, both
groups take a reading comprehension exam. Their Scores are shown
below.
New Activities: 23, 34, 34, 34, 35, 37, 42, 43, 44, 46, 47, 48,
49, 55
Control: 12, 13, 22, 26, 29, 30,...
this is a single sample t test problem
this is math
Assignment #11 Single Sample t-Test What factor determines whether you should use a z-test or a t-test statistic for a hypothesis test? 11.1 A sample is selected from a population mean of u 30. A treatment is administered to the individuals in the sample and, after treatment, the sample mean found to be M 11.2 = 31.3 with a sample variance of s2 9 If the sample consists of...
The table below shows the critical reading scores for 14 students the first two times they took a standardized test. At a 0.01, is there enough evidence to conclude that their scores improved the second time they took the test? Complete parts (a) through (f Student Score on first test Score on second test 415435631552 552 420 466 467 403 665 655 604 424 382 1 2 3 4 5 6 7 89 10 11 12 13 14 411 351...
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....
please find mean AND standard deviation
Reading scores. The grade-level reading scores from a reading test given to a random sample of 12 students in an urban high school graduating class are: 7 8 10 7 8 13 14 12 15 11 10 15 a. Find the mean of the reading scores (Type an integer or a decimal. Round to two decimal places.)
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