The National Assessment of Educational Progress (NAEP) includes a mathematical test for eighth-grade students. Scoreson the test range from 0 to 500. Suppose that you give the NAEP test to an SRS of 2500 eighth-graders from a largepopulation in which the scores have mean u = 282 and standard deviation o = 110. The mean x will vary if you takerepeated samples.Suppose that we took an SRS of 1600 eighth-graders and found x = 285. Compared with an SRS of 2500 eighth-graders,the margin of error for a 95% confidence interval for u issmaller.larger.either smaller or larger, but we can not say which.the same.

Name: The National Assessment of Educational Progress (NAEP) includes a mat
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: The National Assessment of Educational Progress (NAEP) includes a mathematical test for eighth-grade students. Scoreson the test range from 0 to 500. Suppose that you give the NAEP test to an SRS of 2500 eighth-graders from a largepopulation in whic

If the sample size is smaller then the margin of error is larger.

Math

Statistics

Suppose that we took an SRS of 1600 eighth-graders and found ã = 285. Compared with an SRS of 2500 eighth-grad the margin of error for a 95% confidence interval for u is smaller. larger. either smaller or larger, but we can not say which. the same.

Suppose that we took an SRS of 1600 eighth-graders and found ã = 285. Compared with an SRS of 2500 eighth-grad the margin of error for a 95% confidence interval for u is smaller. larger. either smaller or larger, but we can not say which. the same.

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

Assume that the following samples are independent. In a random sample of 400 women, 47% favored health care reform. In a random sample of 300 men, 36% favored health care reform. Construct a 98% confidence interval for the difference between the population proportions p1 − p2 . Based on your interval, is there a significant difference between men and women’s opinions on health care reform? Explain. Calculator function:
Suppose a researcher wants to test if the average diastolic blood pressure in Irish-Americans is different than the average diastolic blood pressure in the general population. Note that the average diastolic blood pressure in the general population is 70 mmHG. If the researcher forms a 95% confidence interval and finds this interval is equal to (71.9, 74.1), which in words says our mean is between 71.9 and 74.1, then what is the researchers conclusion for the hypothesis test at the 5% significance level? Group of answer choices Reject the null hypothesis Retain the null hypothesis
Sally is analyzing wheat production. She sampled 700 wheat farmers from across the state. She found a sample mean of 39 bushels per acre, with a standard deviation of 4.5 bushels. Using a 95% confidence interval, what inference can she make? O The yield per acre of wheat farms in the state ranges from 36.32 to 37.35 bushels. O The yield per acre of wheat farms in the state ranges from 38.67 to 39.33 bushels. O The yield per acre of wheat farms in the state ranges from 42.64 to 46.31 bushels. The yield per acre of wheat farms in the state ranges from 43.86 to 49.52 bushels.
a sample of 25 automobiles shows that the mean price was $20,500 with standard deviation of $2,500. you may assume the distribution of prices is normal. find a 99% confidence interval if we used a 95% confidence interval, what effect if any would that has on the length of the confidence interval.
Solve the following. Show your complete solution The incoming freshman students of a particular college are required to take a mathematics placement examination. As an experiment, 8 randomly selected students were given the exam and then made to join a 4-hour refresher class. These students were given a re-test after the refresher class. Assuming the distribution of scores was approximately normal, construct a 90% confidence interval for the mean difference of the exam scores.
In a study on drug use in the prison population carried out in 2006, it was found that 63% of inmates had consumed alcohol one month before entering prison. In a new survey of 4,985 inmates conducted in 2011, 3,227 reported having consumed alcohol in the 30 days prior to admission. Knowing that the population in 2011 was 71,387 individuals, we want to know with a confidence level of 98% if the percentage of inmates has suffered differences during the considered period. Calculate the p-value and interpret the value obtained
Come up with your own data for a problem that would ask for a 90% confidence interval utilizing Z. Clearly label your variables.
You do a study of hypnotherapy to determine how effective it is in increasing the number of hours of sleep subjects get each night. You measure hours of sleep for 12 subjects with the following results. Construct a 90% confidence interval for the mean number of hours slept for the population (assumed normal) from which you took the data. (Give your answer rounded to the nearest 4 decimal places if necessary.) {7.8, 8.9, 9.5, 11.2, 11.5, 8.3, 11.8, 8.4, 8, 8.4, 10.1, 10.3} (?,? )
A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 8 patients were recorded before administering the drug and after. The mean difference in total cholesterol levels (after - before) was 15.91 mg/dL with a standard deviation of 15.2714 mg/dL. Create a 95% confidence interval for the true average difference in cholesterol levels by the drug. Question 9 options: 1) (-3.1428, 28.6772) 2) (3.1428, 28.6772) 3) (3.4593, 28.3607) 4) (10.5107, 21.3093) 5) (13.5454, 18.2746)
You wish to test the following claim (Ha) at a significance level of a = 0.005. = На: и 84.3 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of sizen = 8 with mean M 94.2 and a standard deviation of SD 18.6. What is the p-value for this sample? (Report answer accurate to four decimal places.)
Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)