high school teachers in a particular school system. A simple random sample of n= 15All 15 teachers are interviewed to determine their salaries for this year and the previousteachers is selected from an alphabetical listing of all high school teachers in the system.6.10 Members of a teachers' association are concerned about the salary increases geSavat t do6.9 SUMMARY193year (see the accompanying table), Use these data to estimate R, the rate of change,for N = 750 high school teachers in the community school system. Place a bound onthe error of estimation.TeacherPast year's salaryPresent year's salary15,40016,700792,קו19.95616,35515,10817,89115,21615,41615,39716,50017,60018,92021,40017,02016,30819,10016,320316,42016,60019,56017,75020,80018.300101118,15216,43619,19217,00617,3111213141518,920An exnerimantor uO inu

Given :The rate of change for N=750 high school teacher in the communityschool system.and A simple…

Answered: 6.10 Members of a teachers' association…

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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An individua's present route to work results in, on average, 40 minutes of travel time per trip. An alternate route has been suggested by a friend, who claims that it will reduce the travel time. Suppose that the new route was tried on 10 randomly chosen occasions with the following times resulting: 1.44, 38.5, 37.5, 39, 38.2, 36, 42, 36.5, 36, 34 Do these data establish the claim that the new route is shorter, at the (a) 1 percent level of significance (b) 5 percent level of significance (c) 10 percent level of significance notes
A corporation that maintains a large fleet of company cars for the use of its sales staff is interested in the mean distance driven monthly per sales person. The following table gives the monthly distances in miles driven by a random sample of 15 sales persons: 2560, 2506, 2437, 2476, 2128, 2537, 2023, 2664, 2555, 2552, 2626, 1900, 2691, 1907, 2542 Based on this sample, find a 90% confidence interval for the mean number of miles driven monthly by members of the sales staff, assuming that monthly driving distances are normally distributed. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) What is the lower limit of the confidence Aa interval? What is the upper limit of the confidence interval?
Section of an oil field has been divided into 48 equal sub-areas. Counting the oil wells in the 48 sub-areas gives the following frequency distribution : Number of 0 1 2 3 4 5 6 7oil wellsNumber of 5 10 11 10 6 4 0 2sub-areasIs there any evidence from these data that the oil wells are not distributed randomly throughout the section of the oil field?
Suppose 40 participants complete an experiment whero ads are presented subliminally during a task) ads are at very fast rates during movie ads)Participants are then given a recognition test of images of the ads, where two images are presented and participants must choose which of the two was presented earlierBoth men and women (20 of each gender) participate in the study and the researcher predicts that the recognition accuracy will offer across gender. The difference between the sample means in this study was 5%. The for the men was 350 and the the women was 250. What is your t value? A) 3 B) 4.69 C) 3.54 D) 4
When presented with prints from the same individual, a fingerprint expert will correctly identify the match 8686% of the time. Consider a forensic database of 12001200 different pairs of fingerprints, where each pair is a match. Complete parts a and b below. Question content area bottom Part 1 a. What proportion of the 12001200 pairs would an expert be expected to correctly identify as a match? The proportion of the 12001200 pairs that an expert would be expected to correctly identify as a match is enter your response here. (Round to four decimal places as needed.) Part 2 b. What is the probability that an expert will correctly identify fewer than 10801080 of the fingerprint matches? The probability that an expert will correctly identify fewer than 10801080 of the fingerprint matches is enter your response here. (Round to four decimal places as needed.)
The data gathered from a survey of a random group of people about their smoking habits and their bodily weights are: a11 =159, a12 =203, a13 =10, a21 =285, a22 =500, a23 =38, a31 214, a32 -300, a33 =28, a41 =113, a42 =189, a43 =30, a51 =467, a52 1,969, a53 71 The following contingency table was created based on the above data, where you will need to calculate the grand total, the total for each row, and the total for each column on your own before answering the question that appears after the table. Very heavy Heavy Moderate Light SMOKING STATUS Non-Smoker Total BODILY Normal 159 285 214 113 467 WEIGHT Overweight 203 500 300 189 1,969 - STATUS Underweight Total 10 38 28 30 71 Calculate the probability of someone who has normal weight, given that the individual is non- smoker (For answers up to four decimal places, enter the number in the box below without rounding it. For answers that have more than four decimal values, round your answer to four decimal places).
In a certain investigation 460 persons were involved in a study and based on an inquiry on their age it was known that 75% of then were atleast 22 years old. The following frequency distribution shows their age
An investigator analyzed the leading digits from 794 checks issued by seven suspect companies. The frequencies were found to be 218, 130, 106, 83, 65, 48, 48, 37, and 59, and those digits correspond to the leading digits of 1, 2, 3, 4, 5, 6, 7, 8, and 9, respectively. If the observed frequencies are substantially different from the frequencies expected with Benford's law shown below, the check amounts appear to result from fraud. Use a 0.025 significance level to test for goodness-of-fit with Benford's law. Does it appear that the checks are the result of fraud? Leading_Digit Actual_Frequency Benford's_Law:1) 218 30.10%2 )130 17.60%3) 106 12.50%4) 83 9.70%5) 65 7.90%6) 48 6.70%7) 48 5.80%8) 37 5.10%9) 59 4.60% Calculate the test statistic, χ2 =? (Round to three decimal places as needed.) Calculate the P-value=? (Round to four decimal places as needed.)
Ten corvettes between one and six years old were randomly selected from the classified ads of the Arizona republic the following data were obtained where X denotes age in years and y denotes price in hundreds of dollars. x (age) 6,6,6,2,2,5,4,5,1,4 price(100ths) 270,260,275,405,364,295,335,308,405,305 (a).draw a scatter diagram. (B)Find the nearest correlation coefficient r. (C)
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10 of 17 > Suppose that the following frequency table contains data on the number of absences in a school year due to illness or injury for 80 randomly selected high school students. Use the table to determine the median number of absences for these 80 students. Provide your answer with precision to one decimal place. Number of Frequency absences 20 1 9. 2. 11 8 4 10 6. 4 3 8 3 9 1 10 11 Click to download the data in your preferred format. Crunchlt! CSV Excel JMP Mac Text Minitab PC Text R SPSS TI Cale median = absences 8

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