topic: random variables What type of variable cannot take a value of a fraction between two consecutive sample points?c. Qualitatived. Quantitative1.a.Discreteb. ContinuousWhich variable can assume an uncountably infinite number of real values?Discrete2.c. Qualitatived. Quantitativea.b. Continuous3. What is the table of values showing sample points of an experiment and their corresponding probabilities?a. Table of random numbersb. Discrete probability distributionc. Frequency distribution tabled. Discrete probability table200 THO4. In a single throw of pair of coins, what is the probability that only one head will appear?11a.1С.s d.5. In a single throw of a pair of dice, how many sample point(s) will have a sum of 12?a. 0b. 1С. 2d. 36. Which graph shows the probability distribution of a random variable where the probabilities (y-axis) of thesample points (x-axis) are represents by vertical bars.a. Bar graphb. Frequency polygonc. Probability histogramd. Scatter graph7. Which function assigns a probability value to a discrete random variable and is defined by a discreteprobability distribution?a. Probability mass functionb. Density functionc. Discrete functiond. Function of x and y

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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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This semester, we have talked about creating random samples as well as desirable qualities of random samples. Other than randomness, one quality of random samples that we have talked about is representation. Using your knowledge of that concept, consider this problem. At a college, 29% of the students are in their first year, 27% are in their second year, 25% in their third, and 19% in their fourth. You take a survey of students and when you classify them by year of study, you have 49, 70, 56, and 25 students in their first, second, third, and fourth years respectively. The table below highlights this information. Year of School First Second Third Fourth Total College Percents Sample Counts Expected Counts 27% 70 25% 56 29% 19% 49 25 200 58 54 50 38 Under the assumption that we think the college enrollment percentages should match our sample, and that therefore our sample represents the college: a) What would the critical value be? (use a = 0.05) b) Find the test statistic to test (c)…
The owner of a small pet supply store wants to open a second store in another city, but he only wants to do so if more than one-third of the city's households have pets (otherwise there won't be enough business). He samples 150 of the households and finds that 64 have pets. Reference: 4-11-StepByStepNo Tech Describe how you would generate a single randomization sample in this situation, and identify (using the appropriate notation) the sample statistic you would record for each sample.
sample is a small part of population true or false
Generate 10000 instances of a poisson (10) random variable and then compute the sample mean, sample variance, and sample standard deviation.
Define Conditional variance?
What is continues random variable briefly explain? Also discuss 3 examples of this
Analysis of variance is a technique used to conduct a hypothesis test to compare three or more population proportions simultaneously true or false?
A store owner wants to know if he sells more sandals or sunglasses during the summer. He records the number of sales for both products for the entire month of June. What is the data-gathering technique used? A experiment randomized survey observational study D voluntary survey C
Which of the following differentiates an experiment from an observational study? O Random selection of subjects Both random selection and random assignment Randomization of treatment
Explain about random error.
SWIMMER’S FLEXIBILITY STUDY Swimming requires complete body movement as defined in sports science. A swimmer’s flexibility helps in his/her movement in water, thus making him/her a faster swimmer. In a study conducted to determine if there is an improvement in swim speed after doing flexibility exercise, 15 swimmers of the same characteristics were randomly selected. They were asked to do a 25-m freestyle and their swim speed (in seconds) were recorded. After this, a flexibility exercise was done. All the swimmers were then asked to do another 25-m freestyle and their swim speed (in seconds) were also recorded. The data collected are given below and can also be found in the worksheet “swim_speed”of excel file “exer3_data.xlsx”. R outputs can be found in the file “exer3_outputs.pdf”.(Use before – after in your computations Swimmer 1 2 3 4 5 6 7 8 Before 16.87 19.42 20.04 22.82 24.24 17.76 23.91 17.17 After 15.82 18.47 20.43 21.76 23.88 18.12 20.96 16.03 Swimmer 9 10 11 12…
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