The margin of error in a confidence interval is calculated using what property of the sampling distribution?MeanO b. SymmetryC.Standard errorO d. Degrees of freedomClear my choicea.The t-distribution approximates the normal distribution as you increase which of the following under the t-distribution?a. Sample sizeb. Variables under studyc. Population mean valued. Number of assumptionsA protein bar is advertised weighing 34g. When a sample of 25 bars is measured, a mean of 34.2g with a standard deviation of 0.6g is found. What is the 95%confidence interval for this sample?a.(31.72,36.68)O b. (33.75,34.25)c. (33.95,34.45)O d. (34.0,34.41)

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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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The distribution of the number of hours that a random sample of people spend doing chores per week is shown in the pie chart. Use 32 as the midpoint for "30+ hours." Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. W Click the icon to view the pie chart. ..... 5-9 12 10-14 23 15-19 16 20-24 18 25-29 12 30+ 4 Find an approximation for the sample mean. x= 16.6 (Type an integer or decimal rounded to the nearest tenth as needed.) Find an approximation for the sample standard deviation. s= (Type an integer or decimal rounded to the nearest tenth as needed.)
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The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 2.4 3.4 2.7 1.8 0.9 4.0 2.2 1.1 3.6 0.4 2.1 3.1 (a) Find the sample mean. x=_____ (Round to two decimal places as needed.) (b) Find the sample standard deviation. s=_____ (Round to two decimal places as needed.) (c) Construct a 90% confidence interval for the population mean μ. A 90% confidence interval for the population mean is (__, __) (Round to two decimal places as needed.)
You would like to know the average hourly wage in your area. You ask 20 people, and find a sample mean of 8.50 dollars. The population standard deviation is 2.89 dollars. Assume that distribution is normal. a. Give a point estimate for the mean hourly wage.b. Give the 90% margin of error for the mean. c. Write a sentence about the results. The average hourly wage in my area is about ________, give or take _______.
Q A For the data shown, answer the questions. Round to 2 decimal places. X 5.5 22.6 29.9 23.3 17.3 27.7 11.9 2 7 3.2 Find the mean: Find the median: Find the sample standard deviation: Submit Question S E R F T 6 Y H 8 O
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The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. 2.4 3.2 2.6 D 1.9 0.8 4.0 Assume the population is normally distributed. 2.2 1.5 3.6 0.5 2.3 3.4 (a) Find the sample mean. X = x= (Round to two decimal places as needed.)
View the photo(s) of the t-distribution table attached and answer the following question. Find the margin of error for the given values of c, s, and n. c=0.99, s=5, n=26 The margin of error is?
Σ ΣΤ . Lesson 7.1, Certify Mode. Questio .x. 1, Can a normal approximation be 仓 A learn.hawkeslearning.com/Portal/Lesson/lesson_certify#! + Save & Exit Certify Lesson: 7.1 Sampling Distributions and the... LORETTA STONE 6/10 Question 7 of 8, Step 1 of 1 Correct Can a normal approximation be used for a sampling distribution of sample means from a population with u = 47 and o = 9, when n = 4? Answer 囲 Tables 画 Keypad Keyboard Shortcuts O No, because the standard deviation is too small. O Yes, because the mean is greater than 30. O No, because the sample size is less than 30. O Yes, because the sample size is less than 30. Submit Answer © 2021 Hawkes Learning
Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations. The students in Hugh Logan's math class took the Scholastic Aptitude Test. Their math scores are shown below. Find the mean score. 600 626 347 356 608 349 357 624 470 482 O 491.7 O 472.5 O 476 O 481.9 A Moving to another question will save this response. K Qu PrtScnR Home F9 PgUp F3 F4 F5 F6 End F7 F10 F12 F11 %23 2$ & 4 7 9. E T Y U // LLI
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A baseball team claims that the mean length of its games is more than 1.4 hours. State H0 and Ha in words and in symbols. Then determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. Explain your reasoning. State the null hypothesis in words and in symbols. Choose the correct answer below. A. The null hypothesis expressed in words is, "the mean length of a baseball team's games is not 1.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≠1.4." B. The null hypothesis expressed in words is, "the mean length of a baseball team's games is at least 1.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≥1.4." C. The null hypothesis expressed in words is, "the mean length of a baseball team's games is at most 1.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≤1.4." D. The null hypothesis expressed in words is, "the mean length of a…

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