alA Assignments: 22/SP-MATH-2 x. McGraw-Hill Education Camp XE McGraw-Hill Connect Mathwww-awu.connectmath.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IBidrJibCPfKOko7ck6WvIOYsfAcQLajlY1PjBj5an38UOpfOBjMzFZ8CO2aBub5qCn2vviXuz6M24781011121314Question 2 of 14 (8 points) Attempt 1 of 1 View question in a popup Ở 1h 26m Remaining7.1 Section ExeHow many computers? In a simple random sample of 150 households, the sample mean number of personal computers was1.2. Assume the population standard deviation is o = 0.81.Part: 0 / 4Part 1 of 4(a) Construct an 80% confidence interval for the mean number of personal computers. Round the answer to at least twodecimal places.An 80% confidence interval for the mean number of personal computers isNext PartSubmit Assignr© 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy

Given that Sample Mean \bar XXˉ = 1.21.2 Population Standard Deviation (\sigma)(σ) = 0.810.81…

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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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A developmental psychologist is interested in studying how long babies gaze at a photograph of a human face. To test this question, she shows a picture to a sample of six babies and records the length of their gaze in seconds. The data are as follows: 12, 17, 18, 20, 20, 29. Calculate the mean, median, mode, range, variance and standard deviation for the sample.
The mean number of eggs per person eaten in the United States is 252 and the standard deviation is 68. Do college students eat more than the average? The 45 college students surveyed averaged 281 eggs per person. What can be concluded at the 0.05 level of significance? H0: = 252 Ha: _____________ 252 Test statistic: __________ p-Value =__________ Reject/Fail to reject H0?______________ Conclusion: There is____________ evidence to make the conclusion that the population mean number of eggs consumed college students per year is more than 252 eggs per student per year. p-Value Interpretation: If the mean number of eggs consumed per year for college students is equal to_________ and if another study was done with a new randomly selected group of 45 college students, then there is a ____________ percent chance that the average number of eggs consumed per year for this new sample would be greater than_____________ . Level of significance…
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In the 1992 presidential election, Alaska's 40 election districts averaged 2002 votes per district for President Clinton. The standard deviation was 566. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places. Find the third quartile for votes for President Clinton. Round your answer to the nearest whole number.
A researcher is interested in finding a 90% confidence interval for the mean number of times per day that college students text. The study included 149 students who averaged 34.2 texts per day. The standard deviation was 18.6 texts. Round to 3 decimals. b. With 90% confidence the population mean number of texts per day is between _______ and ________ texts a day.
Find 90% confidence interval
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
The weights of corn grew on a farm has a mean of 23 ounces and has a standard deviation of 3 ounces. A sample of the corn grown was selected, and the weights of the selected boxes are summarized in the histogram shown. 32 28 24 16 18 19 20 21 22 23 24 25 26 27 28 Weights of the corn ears Part A: How many corns have weights that are more than 1 standard deviation above the mean? Part B: How many corns have weights that are more than 1 standard deviations below the mean? Number of ear of corns
z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?
The ages of undergraduate students at two universities (one in the east and one in the west) are being compared. Researchers want to know if there is a difference in the mean age of students at the two universities. The population standard deviations are known. The following data shows the results of samples collected at each institution: School Location n (sample size) sample mean ( ) population standard deviation West 33 25.78 6.29 East 35 23.16 7.52 What is the value of the test statistic for the previous problem? (Enter your answer as a positive value even if you calculated a negative test statistic value i.e. if you calculated -1.311 you should enter 1.311). Round your answer to 3 decimal places.
A survey was conducted that asked 1016 people how many books they had read in the past year. Results indicated that x = 11.8 books and s = 16.6 books. Construct a 99% confidence interval for the mean number of books people read. Interpret the interval. E Click the icon to view the table of critical t-values. Construct a 99% confidence interval for the mean number of books people read and interpret the result. Select the correct choice below and fill in the answer boxes to complete vour choice. (Use ascending order. Round to two decimal places as needed.) O A. If repeated samples are taken, 99% of them will have a sample mean between and. Table of Critical t-Values O B. There is a 99% probability that the true mean number of books read is between and. OC. There is 99% confidence that the population mean number of books read is between and . t-Distribution Area in Right Tail Degrees of Freedom 0.25 0.20 0.15 0.10 0025 00 0.01 0.005 0.0025 0.001 0.0005 1.376 1.963 1.061 1.386 0.978 1.250…
Consider the following sample data. Sample A: 11, 22, 33 Sample B: 81, 92, 103 Sample C: 1,100; 1,111; 1,122 (a) Find the mean and standard deviation for each sample. Sample A: Sample B: Sample C: Mean Sample Standard Deviation (b) What does this exercise show about the standard deviation? multiple choice The idea is to illustrate that the standard deviation is not a function of the value of the mean. The idea is to illustrate that the standard deviation is a function of the value of the mean.

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