06 * A research assistant randomly selected 75 undergraduate students from the list of all studentsenrolled in the psychology-degree program at a large university. She asked each of the 75students, "How many minutes per day do you typically spend reading?" The mean reading timein the sample was 89 minutes, and the margin of error for this estimate was 4.28 minutes.Another research assistant intends to replicate the survey and will attempt to get a smallermargin of error. Which of the following samples will most likely result in a smaller margin oferror for the estimated mean time students in the psychology-degree program read per day?O40 randomly selected undergraduate psychology-degree program students40 randomly selected undergraduate students from all degree programs at the college300 randomly selected undergraduate psychology-degree program students300 randomly selected undergraduate students from all degree programs at the college

The researcher selected a sample of 75 undergraduate students from the list of all students in the…

Answered: *A research assistant randomly selected…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Similar questions

A group of students want to know the age of students in a high school but do not have the resources to survey an entire population of 4,500. If they want to use a sample with a 5% margin of error, what should their sample size be?
In the United States, standardized testing is used to compare students' knowledge retention across the country. States will often use the results of standardized testing to allocate funding to districts within the state. One state in particular wanted to determine whether there was a difference in scores between schools on the eastern side of the state and schools on the western side of the state. A random sample of 30 schools on the eastern side and 35 schools on the western side were chosen. The mean score for the eastern schools was x1 = 109 with a standard deviation of 5.3. The mean score for the western schools was x2 = 104 with a standard deviation of 4.4. We would like to estimate the difference in the mean standardized scores from the eastern schools and western schools and determine the margin of error of this estimate with 98% confidence. (a) Determine the point estimate for the difference in mean standardized scores for the eastern and western sides of the state, ?1 −…
You have been hired by a consortium of local car dealers to conduct a survey about the purchases of new cars. If you want to estimate the percentage of car owners in Florida who purchased new cars, how many adults must you survey if you want 95% confidence that your sample percentage is in error by no more than three percentage points?
A. Create a Box-and-Whisker Plot B. What is the sample mean of the data C. What is the sample variance of the data
A researcher wants to compare the effectiveness of three different teaching methods (A, B, and C) on exam scores. The researcher gathers exam scores from 20 students for each teaching method, and wants to determine if there is a significant difference in the mean exam scores between the three teaching methods. What test can the researcher use to answer this question?
Before going to college, Chelsea wanted to see if she could sell her old car online. She selected a sample of the prices on 25 similar cars sold online in the past month. Later, Chelsea realized that the lowest-priced car in the sample was mistakenly recorded as half the price it actually sold for. However, after correcting the error, the corrected price was still less than or equal to any other car price in her sample. Which of the following sample statistics must have remained the same after the correction was made? Select one: 1.Range 2.Median 3.Mode 4.Variance 5.Mean
If 40% of all the students are taking four classes, and 60% of all the students are taking three classes, what is the mean (average) number of classes taken for this group of students?
You may need to use the appropriate appendix table or technology to answer this question. According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or higher on the Vivino Rating System is $32.48. A New England-based lifestyle magazine wants to determine if red wines of the same quality are less expensive in Providence, and it has collected prices for 65 randomly selected red wines of similar quality from wine stores throughout Providence. The mean and standard deviation for this sample are $30.15 and $12, respectively. (a) Develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean price in Providence for a bottle of red wine that scores 4.0 or higher on the Vivino Rating System is less than the population mean of $32.48. (Enter != for ≠ as needed.) H0: Ha: (b) Using the sample from the 65 bottles, what is the test statistic? (Round your answer to three decimal…
Which one would be the answer?
Charlie isinterested in whether elementary school students, middle school students, or high school students spend more time reading in the summer. In the beginning of the school year he asks 20 elementary school students, 15 middle school students and 40 high school students to report the number of pages they read over the summer. What statistical test should Charlie use to test his research question?
You may need to use the appropriate appendix table or technology to answer this question. According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or higher on the Vivino Rating System is $32.48. A New England-based lifestyle magazine wants to determine if red wines of the same quality are less expensive in Providence, and it has collected prices for 65 randomly selected red wines of similar quality from wine stores throughout Providence. The mean and standard deviation for this sample are $30.15 and $12, respectively. (d) Repeat the preceding hypothesis test using the critical value approach. State the null and alternative hypotheses. (Enter != for ≠ as needed.) H0: Ha: Find the value of the test statistic. (Round your answer to three decimal places.) State the critical values for the rejection rule. Use ? = 0.05. (Round your answers to three decimal places. If the test is one-tailed, enter NONE for the unused tail.)…
A contributor for the local newspaper is writing an article for the weekly fitness section. To prepare for the story, she conducts a study to compare the exercise habits of people who exercise in the morning to the exercise habits of people who work out in the afternoon or evening. She selects three different health centers from which to draw her samples. The 6060 people she sampled who work out in the morning have a mean of 3.33.3 hours of exercise each week. The 4747 people surveyed who exercise in the afternoon or evening have a mean of 3.43.4 hours of exercise each week. Assume that the weekly exercise times have a population standard deviation of 0.40.4 hours for people who exercise in the morning and 0.70.7 hours for people who exercise in the afternoon or evening. Let Population 1 be people who exercise in the morning and Population 2 be people who exercise in the afternoon or evening. Step 1 of 2 : Construct a 99%99% confidence interval for the true difference…

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