We would like to determine the mean value for a population.Given that the a sample of size 100 has a mean of 8 and the population standarddeviation is o=12, find the 95% confidence interval.NOTE: Enter only the upper bound. For example, if the interval is (20.7, 32.8), thenyou should enter only 32.8 as your answer.Answer:

The range where the population parameter is likely to occur is calculated using the confidence…

Answered: We would like to determine the 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

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2 Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Click the icon to view the data table of IQ scores. F2 W vnat are the null and alternative nypotneses Assume that population 1 consists or subjects with medium lead levers and population consists of subjects with nign lead levels. OA H₂: H₁ = 1/₂ OB. Ho: ₁5₂ H₁: Hy > H₂ H₁ H₁ H₂ S OC. Ho: Hy #4¹₂ H₁: Hy > H₂ elp me solve this The test statistic is 0.11. (Round to two decimal places as needed.) The P-value is 0.457. (Round to three decimal places as needed.) State the conclusion for the test. OA. Reject the null hypothesis. There is sufficient evidence to…
The City University of New York/BMCC Department of Mathematics Math 150 Mid-Term #1. Fall 2021 Last Name: First Name: Please answer any 5 questions. If you answer more than 5, all the questions that you answer shall be evaluated, but only the best 5 will count. All questions carry equal weight. Please write legibly in the spaces provided. Pat took three exams. In Mathematics, her grade was 75, the mean was 90, and the standard deviation was 15. In Physics, her grade corresponded to a Z-Score of -1.25. In Latin, her grade was 73 and the average was also 73. 1. (i). In which class is Pat's relative position strongest? (ii). In which class was Pat's relative position weakest? 2. Find the correlation coefficient, r, for the sample data below (please round your final answer to 3 digits after the decimal): Y
The average time for a student to complete this quiz is 24 minutes with a standard deviation of 2 minutes. What is the range of minutes needed for the middle 99.7% of quiz times? Complete the sentence below. The middle 99.7% of all people finish the quiz somewhere between __________ and __________ minutes.
Find the margin of error for each data from certain populations. 3. 45, 56, 61, 88, 91, 64, 38, 79, 80, 57 at 90% confidence interval.
Construct a confidence interval of the population proportion at the given level of confidence. X = 30 n = 150 C-Level = 0.90 Lower Level = ? Upper Level = ?
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Use the confidence interval to find the margin of error and the sample mean. (0.072,0.210) The margin of error is 0.069. The sample mean is
Let's look at the relationship between hour Price (in thousands of dollars) and house Size (In thousands of square feet) In Saratoga. The relationship is Price = -3.117 +94.454 Size a. You go to an open house and find that the house is 1 standard deviation above the mean in size. What would you guess about its price? type your answer... b. You read an ad for a house priced 2 standard deviations below the mean. What would you guess about its size? type your answer... c. What does the slope of 94.454 mean? type your answer.... d. What are the units of the slope? type your answer... e. Your house is 2000 sq ft bigger than your neighbor's house. How much more do you expect it to be worth? type your answer.. with r=0.77 f. Is the y-intercept of -3.117 meaningful? Explain. 30000
You would like to construct a 99% confidence interval to estimate the population mean score on a nationwide examination in psychology, and for this purpose we choose a random sample of exam scores. The sample we choose has a mean of 485 and a standard deviation of 70. What is the best point estimate, based on the sample, to use for the population mean?
The monthly electric bill for a local business had a mean of 1135. The values go from 1160 to 1300 dollars. Assume that the values is naturally distributed. Which of the following is plausible value for the standard deviation. -15 3 23 140 0
The population standard deviation for number of hours of sleep that people get per night is 1.3 hours. You are interested in finding a 95% confidence interval for the mean amount of sleep people who do not drink coffee get. The data below show the results of the survey that you took. Assume that the standard deviation for people who do not drink coffee is the same as the standard deviation for the general population. 6,8,7,8,8,7,9,5,7,8,6,7,8 Assume a normal distribution and round your answers to two decimal places. A. To compute the confidence interval, use the [Select] distribution. B. With 95% confidence the mean number of hours that people who do not drink coffee get is between [Select] and [ Select] C. If many groups of 13 randomly selected people who do not drink coffee are surveyed, then a different confidence interval would be produced from each group. About [Select] percent of these confidence intervals will contain the true population mean number of hours of sleep per night…
Q17 Identify the level of measurement of the data, and explain what is wrong with the given calculation. In a survey, the responses of respondents are identified as 100 for a " yes", 200 for a " no " , 300 for a maybe , and 400 for anything else. The average ( mean ) is calculated for 587 respondents and the results is 256.1. The data are at the ____ level of measurement. What is wrong with the given calculation ? a. Such data are not counts or measures of anything, so the average ( mean ) needs to be computed in a different way. b. Such data are not counts or measures of anything, so it makes no sense to compute their average ( mean ). c. The true average ( mean ) is 202.4 d. There is nothing wrong with the given calculation.

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