6. A distribution of a variable X has the following characteristics:1%: 025%: 050%: 075%: 4.7599%: 11.25Which of the following best describes the distribution of X?A.) Left-skewedB. SymmetricC. Right-skewedD. Uncertain

Distributions looks like: Here, the first distribution is the symmetric distribution with mean,…

Answered: 6. A distribution of a variable X has…

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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Q:5 The age distribution of 343 students who attended a hip-hop concert is shown below. 4 75 so- Age Which of the following could be the median age? (A) 15.8 (B) 16.5 (C) 17.1 (D) 18.2 (E) 18.5
A study was done to look at the relationship between number of lovers college students have had in their lifetimes and their GPAs. The results of the survey are shown below. Lovers 4 8 3 7 0 6 5 6 GPA 2.7 2.3 3.4 2.4 3.5 2.9 2.7 2.8 r2r2 = (Round to two decimal places) Interpret r2r2 : There is a large variation in students' GPAs, but if you only look at students who have had a fixed number of lovers, this variation on average is reduced by 80%. Given any group of students who have all had the same number of lovers, 80% of all of these studetns will have the predicted GPA. 80% of all students will have the average GPA. There is a 80% chance that the regression line will be a good predictor for GPA based on the number of lovers a student has had. The equation of the linear regression line is: ˆyy^ = + xx (Please show your answers to two decimal places) Use the model to predict the GPA of a college student who as had 7 lovers.GPA = (Please round your…
The national distribution of fatal work injuries in a country is shown in the table to the right under National %. You believe that the distribution of fatal work injuries is different in the western part of the country and randomly select 6231 fatal work injuries occurring in that region. At a = 0.05 National % 42% Western Frequency 2893 Cause Transportation can you conclude that the distribution of fatal work injuries in the west is different from the national distribution? Complete parts a through d below. Equipment Assaults Falls Harmful fumes 19% 1157 14% 806 13% 753 10% 532 Fires 2% 90 a. State Ho and H and identify the claim. What is the null hypothesis, Ho? O A. The distribution of fatal work injuries in the west is 42% transportation, 19% equipment, 14% assaults, 13% falls, 10% harmful fumes, and 2% fires O B. The distribution of fatal work injuries in the west differs from the expected distribution. O C. The distribution of fatal work injuries in the west is 2893…
On the first day of class, a statistics professor asked her students to report their grade point averages (GPAs) as part of a class survey. For those students who knew their GPAs, the histogram was: The distribution is:
An aptitude test was taken by 800 students at the Fairfield Middle School. The box-and-whiskers plot below shows the distribution of their scores. 40 50 60 70 80 90 100 (a) How many students scored above 88? students (b) How many students scored below 72? students (c) How many scores are represented in each quartile? Scores (d) What percent of the students had scores of at least 54? %
Under each Histogram, write a comment about the shape of the distribution (for example, Symmetric, Skewed (left/right), Uniform or Irregular) Students Frequency Frequency of Students 9 1 0 9 8 1 0 2.0 2.40 1 2 Histogram of Students College GPA 9 2.4 6 4 2.56 Histogram of Students Predicted GPA 9 4 2.8 College GPA 3 2 2.72 Predicted GPA 3.2 3 2.88 3 3 2 3.6 3.04
What is the total number of scores for the distribution shown in the following table? X f 4 1 3 3 2 7 1 2 Select one: a. 14 b. 13 c. 11 d. 24
Find: a. The score that sets the cut-off mark of 75% passing b. The score that surpasses the 10% of the distribution c. The score that exceeds 10% of the examinees
The table to the right shows selected ages of licensed drivers in one country and the corresponding percentiles. Find the percentage of drivers who are younger than 35. Age Percentile 75 98 65 86 55 78 45 57 35 39 25 17 20 The percentage of drivers who are younger than 35 is %. (Type a whole number.)
A teacher has 10 students in her class. She collected the finishing time (in minutes) of the mathematics testfor all students:20 24 22 32 23 25 37 26 40 35(a) Find the 25th percentile and 75th percentile of the data. (b) Find the median of the data. (c) Find the range and interquartile range of the data (d) Comment on the skewness of the data with a reason.
State whether you would expect this distribution to be symmetric, left-skewed, orright-skewed, and briefly explain: ages of people obtaining a driver’s license for the firsttime.
Are cigarettes bad for people? Cigarette smoking involves tar, carbon monoxide, and nicotine (measured in milligrams). The first two are definitely not good for a person's health, and the last ingredient can cause addiction. Use the data in the table above to make a stem-and-leaf display for milligrams of tar per cigarette smoked. (Enter NONE in any unused answer blanks.) Are there any outliers? A. Yes, 1.0 may be an outlier. B. No, there are no outliers. C. Yes, 29.8 may be an outlier.

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6. A distribution of a variable X has the following characteristics: 1%: 0 25%: 0 50%: 0 75%: 4.75 99%: 11.25 Which of the following best describes the distribution of X? A. Left-skewed B. Symmetric C. Right-skewed D. Uncertain