**Educational Website Transcription**---**QUESTION 1**A random sample of 67 lab rats are enticed to run through a maze, and a 95% confidence interval is constructed of the mean time it takes rats to do it. It is [2.3 min, 3.1 min]. Which of the following statements is/are true? (More than one statement may be correct.)- [ ] 95% of the lab rats in the sample ran the maze in between 2.3 and 3.1 minutes.- [ ] 95% of the lab rats in the population would run the maze in between 2.3 and 3.1 minutes.- [ ] Using the sample for these rats, about 95% of the time, the interval [2.3, 3.1] would contain the population mean.- [ ] The true population mean is not known.---**QUESTION 2**The IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple random sample of 150 students take an IQ test. What is the standard error for this sample? (Round to hundredth.)---**QUESTION 3**The national IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple random sample of 150 students take an IQ test and the sample mean is 112. What is the lower bound for this 90% confidence interval level for this sample? (Round to hundredth.)---**QUESTION 4**The national IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple random sample of 150 students take an IQ test and the sample mean is 112. What is the upper bound for this 90% confidence interval level for this sample? (Round to hundredth.)---*Click Save and Submit to save and submit. Click Save All Answers to save all answers.*

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Answered: QUESTION 1 A random sample of 67 lab…

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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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 the confidence interval for the population mean u. c=0.98, x=16.5, o=4.0, and n=60. A 98% confidence interval for u is (___,___). (Round to one decimal place as needed.
find a 95% confidence interval for the true proportion of grapes that are used for raisins if a sample of 340 bins of grapes 25.1% are used for raisins. We are 95% confident the true proportion of grapes used for raisins is between ____ and ———
You are interested in constructing a 99% confidence interval for the proportion of all caterpillars that eventually become butterflies. Of the 431 randomly selected caterpillars observed, 50 lived to become butterflies. Round answers to 4 decimal places where possible. a. With 99% confidence the proportion of all caterpillars that lived to become a butterfly is between___ and___ . b. If many groups of 431 randomly selected caterpillars were observed, then a different confidence interval would be produced from each group. About____ percent of these confidence intervals will contain the true population proportion of caterpillars that become butterflies and about ____ percent will not contain the true population proportion.
A random sample of 67 lab rats are enticed to run through a maze, and a 95% confidence interval is constructed of the mean time it takes rats to do it. It is [2.3min, 3.1 min]. Which of the following statements is/are true? (More than one statement may be correct.) 95% of the lab rats in the sample ran the maze in between 2.3 and 3.1 minutes. 95% of the lab rats in the population would run the maze in between 2.3 and 3.1 minutes. Using the sample for these rats, about 95% of the time, the interval [2.3, 3.1] would contain the population mean. The true population mean is not known.
You were interested to know how long do students of mathematics in the university spend studying their math lessons in a day. You asked 10 random students and obtained the following data (in hours): 2, 1.5, 3, 2, 3.5, 1. 0.5, 3, 2, 4. Construct a 99% confidence interval for the average time that students spend studying math in a day. O 1.46 hours to 3.04 hours O none of the choices. O 1.31 hours to 3.19 hours O 0.95 hours to 3.55 hours
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96
Suppose a new treatment for a certain disease is given to a sample of 190 patients. The treatment was successful for 152 of the patients. Assume that these patients are representative of the population of individuals who have this disease. Calculate a 98% confidence interval for the proportion successfully treated. (Round the answers to three decimal places.) ___ to ___
In a recent poll, 430 people were asked if they liked dogs, and 94% said they did. Find the Margin of Error for this poll, at the 95% confidence level. Give your answer to four decimal places if possible. ______________________

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