**Transcription for Educational Website**---### Questions 17 and 18 are related**17.** The lower end of a 95% interval estimate of the mean annual salary of persons with an MBA degree five years after graduation is reported to be $98,655. The interval is based on a sample of 120 persons. The sample standard deviation is $8,670.What is the point estimate of the salary?a. $101,726 b. $100,222 c. $98,741 d. $97,282 **18.** In the previous question, what is the upper end of the interval?a. $101,789 b. $102,818 c. $103,856 d. $104,905 ---### Questions 19-22 are related to the followingYour company self-insures its fleet of cars against collisions. You need to estimate the mean repair costs per accident so that you can set aside enough money to cover these costs. The data for repair costs for a random sample of accidents is shown below.| | | | | | | | | | | | | ||----|----|----|----|----|----|----|----|----|----|----|----|----|| 1320 | 1370 | 2155 | 1965 | 2595 | 2345 | 1870 | 2760 || 2125 | 2185 | 1970 | 1075 | 1950 | 1920 | 1305 | 2320 || 2305 | 2950 | 2050 | 2095 | 965 | 1455 | 2645 | 2790 |---This section provides exercises on estimating the mean and understanding interval estimates using given statistical data.

Answered: 212 с 213 d 214 215 18 216 a 217 b B…

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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Identify the type of observational study (cross-sectional, retrospective, or prospective) described below. A research company uses a device to record the viewing habits of about 10,000 households, and the data collected over the next 10 years will be used to determine whether the proportion of households tuned to a particular children's program decreases. Which type of observational study is described in the problem statement? O A prospective study O A retrospective study A cross-sectional study F4 F5 F6 F7 F8 F9 DELL F10 (... F11 -O F12 O PrtScr Insert Delete PgUp 。 Next PgDn Ho
26 14 30 45 20 21 27 32 40 Age of residents in a neighbourhood 50 9 37 40 36 13 52 10 35 What is the percentile of the data point 40 in the data set? 12 36 57 28 51 47 48 42 42 52 1 53
The number of adult Americans who smoke continues to drop. The table contains estimates of the percentages of adults (ages 1818 and over) who were smokers in the years between 1965 and 201715.and 201715. ???? ?Year � ??????? ?Smokers � 1965 41.94 1970 37.4 1974 37.1 1978 34.1 1980 33.2 1983 32.1 1985 30.1 1987 28.8 1990 25.5 1993 25.0 1995 24.7 1997 24.7 1999 23.5 2001 22.8 2002 22.5 2004 20.9 2006 20.8 2008 20.6 2010 19.3 2012 18.1 2014 16.8 2017 14.0 According to your regression line, how much did smoking decline per year during this period, on the average? Give your answer to three decimal places. average smoking decline: percentage points
Two hundred and eighty boys completed a test that measures the distance that the subject can walk on a flat, hard surface in 6 minutes. For each age group shown in the table, the median distance walked by the boys in that age group is also given. Age Group 3-5 6-8 9-11 12-15 16-18 Representative Age (Midpoint of Age Group) 4 7 10 13.5 17 Median Six-Minute Walk Distance (meters) 543.3 583.0 667.3 702.1 726.6
Suppose there are 5 students in a room. The mean age is 19.8 years, and the median age is 19. If the youngest person leaves and is not replaced by another person, what happens to the mean and the median? O The mean and median increase. The mean increases, and the median either increases or stays the same. The mean increases, but it is impossible to determine whether the median increases, decreases, or stays the same. The mean increases, and the median stays the same. The median increases, and the mean either increases or stays the same.

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