Unit 6 TestTime Remaining: 1:24:41 .HaileyQuestion 1 of 8 (1 point) Question Attempt: 1 of 11245.6.8An existing inventory for a test measuring self-esteem indicates that the scores have a standard deviation of 9. A psychologist gave the self-esteem test to arandom sample of 60 individuals, and their mean score was 59. Construct a 95% confidence interval for the true mean of all test scores. Then give its lowerlimit and upper limit.Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)Lower limit: |Upper limit:3.

Name: Unit 6 TestTime Remaining: 1:24:41 .HaileyQuestion 1 of 8 (1 point) Q
Uploaded: 2024-03-20T07:06:16.000Z
Channel: Bartleby
Description: Unit 6 TestTime Remaining: 1:24:41 .HaileyQuestion 1 of 8 (1 point) Question Attempt: 1 of 11245.6.8An existing inventory for a test measuring self-esteem indicates that the scores have a standard deviation of 9. A psychologist gave the self-esteem

An Existing inventory for a test measuring self-esteemσ=9 indicates that the scores have a standard…

Answered: that the scores have a standard…

Math

Statistics

that the scores have a standard deviation of 9. A psych Construct a 95% confidence interval for the true mean

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

Consider a value to be significantly low if its z score less than or equal to 2 or consider a value to be significantly high if its z score is greater than or equal to 2.A test is used to assess readiness for college. In a recent year, the mean test score was 19.5 and the standard deviation was 4.9 . Identify the test scores that are significantly low or significantly high.
Give a 95% confidence interval for the true mean time students spent practicing for the play. x-bar=45.6 s=13.3 n=120
A researcher is interested in finding a 98% confidence interval for the mean number of times per day that college students text. The study included 149 students who averaged 37.1 texts per day. The standard deviation was 13.4 texts.
A study is run comparing HDL cholesterol levels between men who exercise regularly and those who do not. The 50 men who exercise regularly have a mean HDL of 48.5 with a standard deviation of 12.5. The 100 men who do not exercise regularly have a mean of 56.9 with a standard deviation of 11.9. Construct a 95% confidence interval for the difference between means, assuming equal variance. Give an interpretation of the confidence interval. You MUST show your work
A random sample of monthly gasoline prices was taken from 2005 and from 2011. For 2005, it shows that the average gasoline price was $2.01 with a standard deviation of $1.07. For 2005, it shows that average gasoline price was $3.35 with a standard deviation of $1.32. Can it be concluded that the mean gasoline cost less in 2005?What will be the appropriate statistical analysis to use in this problem? a. t-Test for Comparing Two Means from Independent Samples b. z-test for comparing the difference between two proportions c. t-Test for Comparing Two Means when the Samples are Dependent d. z-Test for Comparing Two Means from Independent Populations e. F-test in Comparing the Difference Between Two Variances
A sample of 30 days of sales were taken. The mean of those 30 days of sales were $10,000 with a standard deviation of $2,000 a. Get a 95% confidence interval for the mean of sales for all days. How many additional sales days would you need to sample to reduce the margin of error to $500?
The time to travel to school for high school students in South Bend is known to have a normal distribution with a standard deviation of o = 15 minutes. You take a simple random sample of 40 South Bend high school students students, and their average time to travel to school is 25 minutes. Find the 90% confidence interval for the population mean time. O A. (21.91, 28.09) B. (21.96, 28.04) O C. (21.00, 29.00) D. (21.10, 28.90)
Compute a confidence interval (95% interval, 2-tailed) for a mean. Data: sample mean = 38.5; sample standard deviation=8; N= 22. CL=
if the gpa is 2.75 of 600 students with a confidence level of 90% what is the margin of error if the standard deviation is .45
A study of 40 English professors showed that they spend, on average, 12.6 minutes correcting a student's term paper. The standard deviation was 2.5 minutes. Construct the 99% confidence interval of the mean for all term papers.
## In a survey of adults with diabetes, the average body mass index (BMI) in a sample of 1938 women was 32.2 with a standard deviation of 0.03. The BMI in a sample of 1555 men was 30.4, with a standard deviation of 0.06. Construct a 92% confidence interval for the difference in the mean BMI between women and men with diabetes, INTERPRET THE RESULTS. DOES THE CONFIDENCE INTERVAL CONTRADICT THE CLAIM THAT THE MEAN BMI IS THE SAME FOR BOTH MEN AND WOMEN WITH DIABETES?
Researchers examined the bill color (in hue degree) of male and female zebra finches. Here are the summary statistics from the study. Sex N Mean Standard deviation Males 59 2.91 1.46 Females 60 7.42 2.48 How different are male and female zebra finches in bill color? The margin of error for a 95% confidence interval for the difference in mean bill color μF – μM (in hue degree) is