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Statistics January 9, 2024-1.5 hours The text must be submitted with name and surname to allow evaluation. Name and Surname Student ID 4 6 41 TF If the covariance between two variables is 0.9, the correlation coefficients can not be greater than 0.9 TF Keeping fixed all the rest, the higher the confidence level the wider the confidence interval TF The smaller the p-value, the stronger the evidence in favour of Ho provided by the data TF If the Interquartile Range is equal to 1, thus the first quartile and the third quartile coincides 1 The number f customers, assumed independent that enter in a shop until one make a purchase can be described by a Binomial rv Geometric rv. Exponential rv Poisson rv 2 12 out of 30 students in a survey, claimed not being involved in smoking activities. Of them, 9 are economics students, while 3 are political sciences students. For what concerns the smoking students, 12 of them are from economics and 6 from political sciences. Which of the following is the proper chi-square index value to test the association between the two variables? 0.24 0.012 0.48 7.2 3 The mean score of adult men on a psycological test is 4.88. A researcher studying hotel managers suspects that successful managers score higher than adult men. A random sample of 48 managers of large hotels has mean = 5.91. The null hypotesis for the researcher's test is Ho: = 5.91 Ho: = 5.91 Ho: > 4.88 Ho: =4.88 Which of the following graphical representation is best suited to identify outliers in data? Histogram Box-plot Bar chart Scatterplot 5 A variable X has variance equal to 10. When converting to a different unit of measure, this variable X is transformed in the new variable Y = 2 + 3*X. What is the value of the variance of Y? Create a set of 5 positive numbers (repeats allowed) that have median 10 and mean 7. 7 During office hour, an average of 3 students per hour come to the office to seek for the professor. What is the probability that more than 3 students arrive if there are 2 consecutive office hours? 8 A 98% confidence interval for a population proportion is (0.34;0.66). What is the size of the random sample used to compute it?

Statistics January 9, 2024-1.5 hours The text must be submitted with name and surname to allow evaluation. Name and Surname Student ID 4 6 41 TF If the covariance between two variables is 0.9, the correlation coefficients can not be greater than 0.9 TF Keeping fixed all the rest, the higher the confidence level the wider the confidence interval TF The smaller the p-value, the stronger the evidence in favour of Ho provided by the data TF If the Interquartile Range is equal to 1, thus the first quartile and the third quartile coincides 1 The number f customers, assumed independent that enter in a shop until one make a purchase can be described by a Binomial rv Geometric rv. Exponential rv Poisson rv 2 12 out of 30 students in a survey, claimed not being involved in smoking activities. Of them, 9 are economics students, while 3 are political sciences students. For what concerns the smoking students, 12 of them are from economics and 6 from political sciences. Which of the following is the proper chi-square index value to test the association between the two variables? 0.24 0.012 0.48 7.2 3 The mean score of adult men on a psycological test is 4.88. A researcher studying hotel managers suspects that successful managers score higher than adult men. A random sample of 48 managers of large hotels has mean = 5.91. The null hypotesis for the researcher's test is Ho: = 5.91 Ho: = 5.91 Ho: > 4.88 Ho: =4.88 Which of the following graphical representation is best suited to identify outliers in data? Histogram Box-plot Bar chart Scatterplot 5 A variable X has variance equal to 10. When converting to a different unit of measure, this variable X is transformed in the new variable Y = 2 + 3*X. What is the value of the variance of Y? Create a set of 5 positive numbers (repeats allowed) that have median 10 and mean 7. 7 During office hour, an average of 3 students per hour come to the office to seek for the professor. What is the probability that more than 3 students arrive if there are 2 consecutive office hours? 8 A 98% confidence interval for a population proportion is (0.34;0.66). What is the size of the random sample used to compute it?

MATLAB: An Introduction with Applications
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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Statistics January 9, 2024-1.5 hours The text must be submitted with name and surname to allow evaluation. Name and Surname Student ID 4 6 41 TF If the covariance between two variables is 0.9, the correlation coefficients can not be greater than 0.9 TF Keeping fixed all the rest, the higher the confidence level the wider the confidence interval TF The smaller the p-value, the stronger the evidence in favour of Ho provided by the data TF If the Interquartile Range is equal to 1, thus the first quartile and the third quartile coincides 1 The number f customers, assumed independent that enter in a shop until one make a purchase can be described by a Binomial rv Geometric rv. Exponential rv Poisson rv 2 12 out of 30 students in a survey, claimed not being involved in smoking activities. Of them, 9 are economics students, while 3 are political sciences students. For what concerns the smoking students, 12 of them are from economics and 6 from political sciences. Which of the following is the proper chi-square index value to test the association between the two variables? 0.24 0.012 0.48 7.2 3 The mean score of adult men on a psycological test is 4.88. A researcher studying hotel managers suspects that successful managers score higher than adult men. A random sample of 48 managers of large hotels has mean = 5.91. The null hypotesis for the researcher's test is Ho: = 5.91 Ho: = 5.91 Ho: > 4.88 Ho: =4.88 Which of the following graphical representation is best suited to identify outliers in data? Histogram Box-plot Bar chart Scatterplot 5 A variable X has variance equal to 10. When converting to a different unit of measure, this variable X is transformed in the new variable Y = 2 + 3*X. What is the value of the variance of Y? Create a set of 5 positive numbers (repeats allowed) that have median 10 and mean 7. 7 During office hour, an average of 3 students per hour come to the office to seek for the professor. What is the probability that more than 3 students arrive if there are 2 consecutive office hours? 8 A 98% confidence interval for a population proportion is (0.34;0.66). What is the size of the random sample used to compute it?
Transcribed Image Text:Statistics January 9, 2024-1.5 hours The text must be submitted with name and surname to allow evaluation. Name and Surname Student ID 4 6 41 TF If the covariance between two variables is 0.9, the correlation coefficients can not be greater than 0.9 TF Keeping fixed all the rest, the higher the confidence level the wider the confidence interval TF The smaller the p-value, the stronger the evidence in favour of Ho provided by the data TF If the Interquartile Range is equal to 1, thus the first quartile and the third quartile coincides 1 The number f customers, assumed independent that enter in a shop until one make a purchase can be described by a Binomial rv Geometric rv. Exponential rv Poisson rv 2 12 out of 30 students in a survey, claimed not being involved in smoking activities. Of them, 9 are economics students, while 3 are political sciences students. For what concerns the smoking students, 12 of them are from economics and 6 from political sciences. Which of the following is the proper chi-square index value to test the association between the two variables? 0.24 0.012 0.48 7.2 3 The mean score of adult men on a psycological test is 4.88. A researcher studying hotel managers suspects that successful managers score higher than adult men. A random sample of 48 managers of large hotels has mean = 5.91. The null hypotesis for the researcher's test is Ho: = 5.91 Ho: = 5.91 Ho: > 4.88 Ho: =4.88 Which of the following graphical representation is best suited to identify outliers in data? Histogram Box-plot Bar chart Scatterplot 5 A variable X has variance equal to 10. When converting to a different unit of measure, this variable X is transformed in the new variable Y = 2 + 3*X. What is the value of the variance of Y? Create a set of 5 positive numbers (repeats allowed) that have median 10 and mean 7. 7 During office hour, an average of 3 students per hour come to the office to seek for the professor. What is the probability that more than 3 students arrive if there are 2 consecutive office hours? 8 A 98% confidence interval for a population proportion is (0.34;0.66). What is the size of the random sample used to compute it?
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