2-Final ExamTime left 1:43:31The average salary of 81 random employees in a certainfinancial sector was 3400 USD. From past information, we canassume that the standard deviation of the population is 270USD. We are interested in the 90% confidence interval for thepopulation mean. What is the value of the standard error?Select one:O a. 50O b. 30O c. 40O d. 608.You are given the following frequency distribution.ClassFrequencyut ofA1520Chp1610fgfgf10f11f12

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Answered: 2-Final Exam Time left 1:43:31 The…

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 average speed of 100 random cars traveling on a certain highway was 80 km/h. From past information, we can assume that the standard deviation of the population is 20 km/h. What is the margin of error with a 99% level of confidence for the population average ?speed :Select one a. 5.152 O b. 2.326 O c. 2.564 O d. 1.282 O e. 2.576 O f. 4.652 O
Chloe was enrolled in a different section of introductory psychology. Her information for the midterm and final are provided below. Section X M s Midterm 38 50 10 Final 78 100 12 The department has decided that all marks from introductory psychology courses should be reported based on a standardized distribution with a mean of 100 and standard deviation of 20. What would be Chloe’s midterm and final examination scores based on this new distribution?
Prof. Gersch knows that the score on a standardized test is perfectly normal with unknown mean and a standard deviation of 50. He then takes a random sample of 25 tests and finds that the average of these is 200. Prof. Gersch wishes to make a 95% confidence interval for the average of all the grades.What is the upper end of the confidence interval? a. 220 b. 300 c. 298 d. 225.8 e. 329 f. 219.6
Suppose that replacement times for washing machines are normally distributed with a mean of 8.3 years and a standard deviation of 1.3 years. Find the replacement time that separates the top 18% from the bottom 82%. Round to the nearest tenth. Click to view page 1 of the table. Click to view page 2 of the table, O A. 8.5 years O B. 9.5 years OC. 8.9 years O D. 7.1 years Click to select your answer. tv MacBook Air 4) F7 80 D00 F4 ES esc FI * & # $ % 9 @ 6 7 8 2 3 4 P W E R
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
Type if A if you should accept the study as having a mean not to different from the population mean. Type R if you should reject the study as having a too different mean from the population mean. A researcher wants to determine whether the mean height of 31, 18 year old Filipino teens is significantly different from the population average of 5.2 ft. The mean and the standard deviation of the scores of the researcher's study is 5.4 ft and 7; respectively. Assume a 99% confidence level. A researcher wants to determine whether the mean lifespan of 16 pet goldfish living in the same tank is significantly different from the population average of 12 years. The mean and the standard deviation of the pet goldfish's lifespan is 9.5 and 11; respectively. Assume a 90% confidence level.
The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 121 and standard deviation of 16 .Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher.a. Around what percentage of adults in the USA have stage 2 high blood pressure? Give your answer rounded to two decimal places.____%b. If you sampled 2000 people, how many would you expect to have BP> 160? Give your answer to the nearest person. Note: I had a bit of an issue encoding rounded answers, so try rounding both up and down if there's an issue!_______people
For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds to z=2.50? а. 42 b. 52 C. 70 d. 46 e. 38
Your favorite statistics professor is starting up a UNO Genius Club, and you really want to get in. Everyone enrolled at UNO is eligible to take the qualifying exam and 8,647 students take the exam. You show up to take the test on a Sunday morning. Your professor announces on Monday that the distribution of scores was normal with a mean test score of 120 and a standard deviation of 14. Answer questions 24-28 using this information. What percentage of students scored above 112? **Don’t round z scores while calculating; round final answer to 2 decimals. 1) draw the normal curve, 2) plot the z-scores, and 3) shade in the area of interest.
A Moving to another question will save this response. Question 5 The national scores on an exam were normal distributed with a mean of 428 and a standard deviation of 113. Approximately what percent of those taking this test had scores between 315 and 541? A Moving to another question will save this response. Session 10 GN.docx MacBook Pro
You know the mean and standard deviation of the population. You take a sample from this population and compute the 90% confidence interval for the mean. This interval contains values that are within how many standard deviations of the mean?

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