Isabr lla HalruryDevon is conducting research on the average amount of money spend on lunch perperson per week. Using past research, he assumes the population standardal erwdeviation is $15.75. How many people will need to be randomly sampled in order toestimate the true mean with the following stipulations?16.95% confidence, within $0.7517.95% confidence, within $2.0018.95% confidence, within $4.0019. What conclusion can you draw about how the sample size changes as the maximumVileberror changes? (One sentence minimum for full credit.)2eilimebe es orunsm tonnib ylisbthe data20. You are conducting a private opinion poll for a politician to determine what proportion ofthe population favors the decriminalization of marijuana. How large a sample do youneed in order to be 94% confident that the sample proportion will not differ from the trueproportion by more than 3%.21.A survey of 600 fatal accidents showed that 156 involved the use of a cell phone.Construct a 90% confidence interval for the proportion of fatal accidents that involvedthe use of a call phone. T00don 22. A teacher bases grades on four tests and a final exam. The four tests each countIsabelio D-toward 17.5% of the final grade, and the final exam counts for 30%. If a studentof obroreceived 82, 91, 85 and 87 on the first four tests and an 86 on the final exam, what isthe student's overall average?86e iw niem ou orls dsmes23. Use counting principles to calculate the probability of getting a 5-card poker handconsisting of a 4-of-a-kind (ie four kinds, four aces, etc).00 S224. Four in five households no longer have a land-line house phone. (These are familiesthat use cellular phones only.) In a random sample of 21 families, what is theprobability that at least 5 families have a land-line house phone.25. Sixty percent of families say their children have a significant influence on their dailydinner menu choice. Construct a binomial distribution for a sample of three familieswho are asked if their children significantly influence the daily dinner menu.g nginigo atvng s pritoubnoo o8 uoY OShe populaton sing theto nolhoyeb er anovst noitslugog erttLOy obb fon llw noihong eigmuae nsbicoo 09 ad ol 1ebio i besnsunt erti maor bevlovni 0er ord boworle ainebce itel 000 to vene.Sbovlovni ted dnoblaoe istel to noinogoig erl nol levieini sonablinoo 00 e Jounianoenora eo s to seu erl

Answered: Devon is conducting research on 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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Salaries for teachers in a particular elementary school district are normally distributed with a mean of $47,000 and a standard deviation of $4,600. We randomly survey ten teachers from that district. (Round your answers to the nearest dollar.)a. Find the 90th percentile for an individual teacher's salary b. Find the 90th percentile for the average teacher's salary.
You are applying for a job at two companies. Company A offers starting salaries with u = $33,000 and o = $1,000. Company B offers starting salaries with u = $33,000 and o = $3,000. From which company are you more likely to get an offer of $35,000 or more? Choose the correct answer below. O A. Company A, because data values that lie more than two standard deviations from the mean are considered unusual. O B. No difference, because data values that lie more than three standard deviations from the mean are considered very unusual. O C. Company B, because data values that lie within one standard deviation from the mean are not considered unusual.
The 2011 gross sales of all firms in a large city have a mean of $2.4 million and a standard deviation of $ 0.6 million. Using Chebyshev's theorem, find at least what percentage of firms in this city had 2011 gross sales of $1.2 to $3.6 million. Round your answer to the nearest whole number. Enter your answer in accordance to the question statement %
The weights of 6 month-old girls in the United States are Normally distributed with a mean of approximately 16 pounds and a standard deviation of approximately 2 pounds. a. What percentage of 6 month-old girls do we expect to weigh between 15 pounds and 18 pounds? (To show your work: Write down which calculator/program you are using and what values you are entering into the calculator.) b. Find the cutoff weight value for the top 5% of weights for 6-month-old girls. (To show your work: Write down which calculator/program you are using and what values you are entering into the calculator.)
You perform a one-sample t test and calculate a t statistic of 3.0. The mean of your sample was 1.3 and the standard deviation was 2.6. How many participants were used in this study?
The mean Math ACT score was 20.5, with a standard deviation of 5.5. Sarah scored a 26 on the Math ACT. According to the empirical rule, what percent of students taking the Math ACT scored higher than Sarah? O 5.5% O 16% O 84% O 2.5%
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 261.8261.8 and a standard deviation of 66.966.9. (All units are 1000 cells/muμL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 11 standard deviationdeviation of the mean, or between 194.9194.9 and 328.7328.7? b. What is the approximate percentage of women with platelet counts between 61.161.1 and 462.5462.5?
The starting salary for a computer programmer major has a mean of $39,269 and a standard deviation of $2550. what percentage of computer programmer major received a starting offer between $32000 and $38000?
If the mean height of bonsai trees is 52 cm with a standard deviation of 10 cm, what percent of the trees are above 82 cm? Select one: a. 0.3% O b. 82 O c. 3% O d. 0.15% Students at Roseville High School took an IQ test with a mean of 100 and a standard deviation of 15. Approximately, what percent of the students scored above 100? Answer: o represents the
Esp Heavy children: Are children heavier now than they were in the past? The National Health and Nutrition Examination Survey (NHANES) taken between 1999 and 2002 reported that the mean weight of six-year-old girls in the United States was 49.3 pounds. Another NHANES survey, published in 2008, reported that a sample of 193 six-year-old girls weighed between 2003 and 2006 had an average weight of 52 pounds. Assume the population standard deviation is o =16 pounds. Can you conclude that the mean weight of six-year-old girls in 2006 is different from what it was in 2002? Use the a =0.01 level of significance and the critical value method. 00 Part: 0/ 5 Part 1 of 5 (a) State the appropriate null and alternate hypotheses. H.: OD O=0 dl. H : This hypothesis test is a (Choose one) test. 00
The Human Development Report 2013, published by the United Nations, showed life expectancies by country. Values reported for some countries in Western Europe and values reported for some countries in Africa are available in the accompanying table. a. Which group (Western Europe or Africa) of life expectancies do you think has the larger standard deviation? Why? b. Find the standard deviation for each group. Compare them to illustrate that s is larger for the group that shows more variability from the mean. Click the icon to view the life expectancy data. X Life Expectancy Data a. Which group do you think has the larger standard devia European Country Austria O A. The Africa group should have the larger standard d O B. The Western Europe group should have the larger OC. The Western Europe group should have the larger O D. The Africa group should have the larger standard d Life Expectancy African Country 81 Angola Botswana 80 80 Belgium Denmark Finland France 81 83 81 standard deviation…
The weights for newborn babies is approximately normally distributed with a mean of 6.1 pounds and a standard deviation of 1.8 pounds. Use the Cumulative Z-Score Table to answer the questions below. Write your answers rounded to the nearest whole number. Consider a group of 1200 newborn babies: • How many would you expect to weigh between 7.72 and 9.34 pounds? • How many would you expect to weigh less than 9.7 pounds? How many would you expect to weigh more than 6.37 pounds? How many would you expect to weigh between 6.1 and 7.54 pounds?

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