Twelve randomly-chosen students were asked how many times they had missed class during a certain semester, with this result: 2, 1, 5, 1, 1, 3, 4, 3, 1, 1, 5, 18
1. We asked 6 students how many times they rebooted their computers last week. • There were 4 Mac users and 2 PC users. • The PC users rebooted 2 and 3 times. • The Mac users rebooted 1, 2, 2 and 8 times. Let Yi be a Bernoulli random variable representing the type of computer of a randomly chosen student (i.e., Y1 = 0 for MAC user, and Y1 = 1 for PC user) Let Y, be the number...
Twelve (12) randomly selected adults were asked how many US states they had visited and how many foreign countries they had visited. Use α = .05 . # of states, x 20 27 8 8 32 7 3 10 32 25 20 8 # of countries, y 0 5 0 7 5 5 0 5 10 4 4 8 Find the linear correlation coefficient, r. (Round to the nearest ten-thousandth.) The heights and weights of 15 randomly selected adult men...
26 randomly selected students were asked the number of movies they watched the previous week. The results are as follows: # of Movies 0 1 2 3 4 Frequency 5 6 7 5 3 Round all your answers to 4 decimal places where possible. The mean is: ___ The median is: ___ The sample standard deviation is: ___ The first quartile is: ___ The third quartile is: ___ What percent of the respondents watched at least 2 movies the previous...
20 randomly selected students were asked the number of movies they watched the previous week. The results are as follows: # of Movies 0 1 2 3 4 Frequency 4 5 6 1 4 Round all your answers to 4 decimal places where possible. The mean is: The median is: The sample standard deviation is: The first quartile is: The third quartile is: What percent of the respondents watched at least 2 movies the previous week? % 75% of all...
21 randomly selected students were asked the number of movies they watched the previous week. The results are as follows: 0 1 3 4 5 # of Movies Frequency 2 3 4 3 3 3 2 6 Round all your answers to 4 decimal places where possible. The mean is: The median is: The sample standard deviation is: The first quartile is: The third quartile is: What percent of the respondents watched at least I movies the previous week? %...
MODULE 2 HOMEWORK: DESCRIPTIVE STATISTICS 40206 MODULE 2: HOMEWORK 56 randomly selected students were asked how many siblings were in their family. Let X represent the number of pairs of siblings in the student's family. The results are as follows: # of Siblings 1 2. 4 10 Frequency 13 6 10 10 Round all yeur answers to 4 decimal places where possible. The mean is: The median is The sample standard deviation is The first quartile is The third quartile...
5. North Carolina State University posts the complete grade distributions for its courses online. The distribution of grades for all students in all sections of Accounting 210 in the spring semester of 2001 was Grade Probability .18 32 34 09 07 a. Using the scale A -4, B-3, C-2, D- 1, and F 0, let Xbe the grade of a randomly chosen b. Let X denote the mean grade for a random sample of 50 students from Accounting 210. Since...
In a survey, people were asked how many times per year they had their car in the shop for repairs. The results are shown below. What is the average number of times people bring their car in the shop for repairs? Number of times in shop Frequency 0 17 1 21 2 11 3 5
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. At α = .02, is the degree of certainty independent of credits earned? Credits Earned Very Uncertain Somewhat Certain Very Certain Row Total 0 – 9 15 7 2 24 10 – 59 10 5 6 21 60 or more 4 10 14 28 Col Total 29 22 22 73 Click here...
Question 1. Thirty graduate students were asked how many credit hours they were taking in the current quarter. Download the available data: Calculate the mean, median, standard deviation, variance, and range for this sample using Excel. Write a sentence explaining what each measure means. What is the standard error of the mean based on the data? What would be the best point estimate for the population credit hours? (“Population” refers to all graduate students’ credit hours in the universe.) What...