Q. 63 If there are only two classes C, and C₂ havingfrequencies a and b which are hypothesised to occurin the ratio ₁: r₂, how can you calculate the value ofstatistic-x²?

Given that, there are only two classes C1 and C2 having frequencies a and b which are hypothesised…

Answered: Q. 63 If there are only two classes C,…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

6.2.6 In a survey of introductory statistics students, an in- structor asked her students to report how many Facebook friends they had. Suppose that the intent is to study whether there is an association between number of Facebook friends and a person's sex.
24. Sales of a video game released in the year 2000 took off at first, but then steadily slowed as time passed. The table gives the # of games sold (thousands) for various years. Year # sold a) Clearly state the response variable. (thousand) b) Sketch a scatterplot of the data. 2000 2001 2002 142 149 154 c) What is the shape of the association? 2003 155 d) Compare the correlation coefficient to decide if a linear, exponential, or logarithmic model best fits the data. 2004 159 2005 161 2006 163 e) Based on your response for (d) give the equation of the regression equation. 2007 164 2008 164 2009 166 f) Based on your response for (d) predict the # sold in the year 2015. Is this predication trustworthy. 2010 167 g) Based on your response for (d) find the residual for the year 2007.
6.2.6 In a survey of introductory statistics students, an in- structor asked her students to report how many Facebook friends they had. Suppose that the intent is to study whether there is an association between number of Facebook friends and a person's sex.
6. A Pearson's r correlation coefficient w/ a negative sign implies that: O As the explanatory variable decreases, the response variable increases O As the explanatory variable decreases, the response variable decreases O As the independent variable increases, the dependent variable increases O As the independent variable increases, the dependent variable does not change
19.30 (EX) Color blindness: Color blindness, or dyschromatopsia, is a form of genetic deficiency in color perception. The condition is much more prevalent among males than females, pointing to a genetic connection with the X chromosome. The frequency of dyschromatopsia in the Caucasian American male population is about 8%. However, it is thought that this proportion might be smaller among males of other ethnicities. We want to estimate the proportion of Asian American males who are color-blind. If 0.1 was used for p*, in order to obtain a 95% confidence interval with a margin of error no greater than 2%, or 0.02, the sample size has to be at least [1]. Give your answer as a whole number.
2.) The table shows the distribution of a random sample of fatal motor vehicle collisions by time of day and gender in a recent year. Use a = 0.10 significance to perform a Chi-Square hypothesis test. O: E: C: O: E: C: totals: 12:00-5:59 6:00-11:59 654 308 490 231 12:00-5:59 pm 654 308 6:00-11:59 pm 1471 692 totals
13) What are the two properties of the correlation coefficient? 14) which correlation coefficient shows the most relationship between the variables? a) .58 b) -.71 c) 2.14 d) .65
Help me please!! A report from a certain NGO stated that on average a woman visits her physician 5.8 times a year. A researcher randomly selects 20 women and obtained these data. 3 2 1 3 7 2 9 4 6 6 8 0 5 6 4 2 1 3 4 1 At a = 0.05 can it be concluded that the average is still 5.8 visits per year?
A) A researcher conducts an experiment comparing four treatment conditions with a separate sample of n = 6 in each treatment. An ANOVA is used to evaluate the data, and the results of the ANOVA are presented in the following table. Complete all missing values in the table. (Hint: Begin with the values in the df column). Source SS df MS F Between-treatment Within treatment 2 Total 58 B) Several factors influence the size of the F-ratio. For each of the following, indicate whether it would influence the numerator or the denominator of the F-ratio, and indicate whether the size of the F-ratio would increase or decrease. Increase the differences between the sample means. Increase the sample variances.
1-5. A study is conducted to determine the relationship between a driver’s age and the number of accidents a person has over a one-year period. The data are shown below. At α = 0.05, using Pearson correlation, is there a significant relationship between a driver’s age and the number of accidents a person? 1. What is the value of r? a) -0.172 b) -0.892 c) 0.172 d) 0.892 2.The regression equation is defined by y' = a + bx. What is the value for a? a) 4.02 b) 3.36 c) 3.07 d) 2.86 3. The regression equation is defined by y' = a + bx. What is the value for b? a)0.34 b) 0.29 c) -0.03 d) -0.34 4. If we do t test for the correlation coefficient. What will be the test value? a)1.36 b) 1.28 c) -0.43 d) -0.56 5. What is the critical value to be used in the given problem? a) ±1.943 b) ±2.306 c) ±2.365 d) ±2.447
1.1 A lecturer wants to know if his statistics class has a good grasp of basic maths from matric level. Eleven students are chosen at random from the class and given a maths proficiency test. The lecturer wants the class to be able to score above 75 on the test to show that they had a good grasp of basic maths. The eleven students get scores shown below: 62 88 71 50 67 70 92 75 68 83 95 Can the lecturer be 95 percent confident that the students had a good grasp of basic maths?
10.Which of the following is the most common example of a situation for which the main parameter of interest is a population proportion? a) A binomial experiment b) A normal experiment c) A randomized experiment d) An observational study

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS

Q. 63 If there are only two classes C, and C₂ having frequencies a and b which are hypothesised to occur in the ratio ₁: r₂, how can you calculate the value of statistic-x²?