Answered: 1. Classify each of the following… | bartleby

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 9PPS

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12:31 AM AME •
4_57830...4250162
8
Assignment One
1. Classify each of the following variables as quantitative or qualitative and state their
measurement scale.
(a) Age (in years)
(b) Age in categories (0–20, 21–35, 36–45, 45–60, 60–85, 85+)
(d) Toxicity (mild, moderate, life-threatening, dead)
(e) Blood pressure
(f) Time of flight of a missile
2. Consider the following score of 56 students out of 40 as data sets.
31 33 33 34 34 35 35 17 31 36 17 18 19 25 26 27 27 19 20 22 31 36 38 13 22 22 35 36 28 28
29 30 30 36 11 13 16 17 17 22 22 23 23 23 23 24 24 24 25 27 27 28 28 30 13 16
Use these data to prepare:
(a) a frequency distribution, a relative frequency distribution and a cumulative frequency
distribution.
(b) a Histogram, frequency polygon and Ogive curve
(c) Mean, Median and Mode.
(d) Range, Mean deviation about mean, Mean deviation about median, Variance,
Standard deviation and coefficient of variation and interpret the results.
3. A. The following is the frequency distribution of marks in Stat 1011 of 46 students (out
of 20).
Mark (x:)
10
11
12
13
14
15
16
17
18
Total
No of students (f.) 1
2
6
10
11
3
46
Find the mean, median, mode, variance, standard deviation and coefficient of variation
and interpret the results.
4. An investigator decided to construct a frequency distribution with five classes. The
following information was available. For fifty observations made a characteristic under
study, the first two and the last two frequencies were 6, 10, 10 and 6 respectively. Given
the last class mark is 66 and upper class limit of the fifth class is 72. Complete the
frequency distribution.
Set by Kindu Kebede, Department of Statistics, Haramaya University
Page 1
Assignment One
88
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A paper investigated the driving behavior of teenagers by observing their vehicles as they left a high school parking lot and then again at a site approximately 1 2 mile from the school. Assume that it is reasonable to regard the teen drivers in this study as representative of the population of teen drivers. Amount by Which Speed Limit Was Exceeded MaleDriver FemaleDriver 1.3 -0.1 1.3 0.4 0.9 1.1 2.1 0.7 0.7 1.1 1.3 1.2 3 0.1 1.3 0.9 0.6 0.5 2.1 0.5 (a) Use a .01 level of significance for any hypothesis tests. Data consistent with summary quantities appearing in the paper are given in the table. The measurements represent the difference between the observed vehicle speed and the posted speed limit (in miles per hour) for a sample of male teenage drivers and a sample of female teenage drivers. (Use μmales − μfemales.Round your test statistic to two decimal places. Round your degrees of freedom down to the nearest whole number. Round your p-value to…
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Consider the following examples of populations, together with thevariable/characteristic measured on each population unit. a. Population: All undergraduate SAMCIS students enrolled at SLU for the 1stSemester of AY 2021-2022.Variable: Student’s major or field For the above situation,i. Classify the variable of interest as either qualitative or quantitative,ii. Determine the corresponding level of measurement of the variable.iii. Name another variable that can be measured or observed from the population.
A dietitian wishes to see if a person’s cholesterol level will be changed if the diet is supplemented by a certain mineral. Four subjects were pre-tested, and they took the mineral supplement for a 6-week period. The results are shown in the table. Is there sufficient evidence to conclude that the population mean of cholesterol levels has been changed after six weeks at α=0.2α=0.2? Assume that the differences are from an approximately normally distributed population. Subject Cholestrol Level (mg/dl) Cholestrol Level after 6 Weeks (mg/dl) dd ¯dd¯ (d−¯d)2(d-d¯)2 1 206 217 11 2 219 184 -35 3 202 204 2 4 213 205 -8 Total -30 a) Calculate the mean, the sum of the squared deviation from the mean, and the standard deviation of differences. Do not include the unit for each answer: ¯d=d¯= (do not round) ∑(d−¯d)2=∑(d-d¯)2= (do not round) sd=sd= (rounded to one decimal place) b) Perform the hypothesis test in the following steps: Step 1.…

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