"Conservationists have despaired over destruction of tropical rain forest by logging,clearing, and burning." These words begin a report on a statistical study of the effectsof logging in Borneo. Here are data on the number of tree species in 12 unloggedforest plots and 9 similar plots logged 8 years earlier:22 18 22 20 15 21 13 13 19 13 19 1517 4 18 14 18 15 15 10 12UnloggedLoggedDoes logging significantly reduce the mean number of species in a plot? Assumeequal population variances and use a = 0.05. Use the difference: logged - unlogged.1. Test Stat:2. Critical Region:a. T> -1.729b. Tabs (-1.729)c. T< -1.729d. T> abs (-1.729)3. Conclusion: At 5% level of significancea. logging reduces the mean number of species in the plotb. there is no evidence that logging reduces the mean number of speciesin the plot

From the provided information, Sample size (n1) = 12 and n2 = 9 Level of significance (α) = 0.05

Answered: "Conservationists have despaired over…

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

M3
Delays in discharges from immediate health care facilities create unnecessary risks of expenses for patients and their families. Discharge delays (in days) from two healthcare facilities are shown in the following table. Assume that these data represent SRSs from their respective populations and that the populations demonstrate no major departure from normality. Facility A 12 9 13 16 7 19 20 16 15 14 12 16 facility B 7 10 13 15 9 15 12 16 8 9 6 12 a. Find the mean, median, variance and standard deviation of delays times for Facility A. b. Find the mean, median, variance and standard deviation of delays times for Facility B. c. Compare delays times in the facilities and test whether there was significant difference in mean delay times? Use alpha=0.05
1. The maximum number of sit-ups completed by the participants in an exercise class after 1 month of the program is given below. Construct a two-stem stem and leaf plot. 24 31 54 62 36 28 55 18 27 80 37 58 32 37 41 55 39 56 42 29 35 35 2. Find the mean, median, 20% trimmed mean, first quartile, and third quartile for the data in question 3. Show your work for credit. 3. A statistics class has 20 female students and 10 male students. Average exams score for the females is 78.5 and the average exam score for the males is 72.1. What is the average exam score of the entire class?
Answer the following questions. 1. Explain the terms 'classification and tabulation' and point out their importance in a statistical study. Comment on, 'Tabular presentation does not add anything to the information already contained in the data'.
The table below shows the number of state-registered automatic weapons and the murder rate for several states in the U.S. 11.6 8.4 6.7 3.5 2.7 2.7 2.2 0.9 14.1 11.3 9.9 6.8 6.2 6.3 5.8 I = thousands of automatic weapons y = murders per 100,000 residents Keep in mind, the data in the table do not necessarily imply a direct causal link between the two variables. (In fact, can you think of any reasons why these variables may not be directly related to each other?) Also, the purpose of this question is not to make a political statement about guns or gun control. It's only to illustrate that data such as these sometimes have mathematical relationships that can be modeled with linear equations. Those relationships should always be questioned and examined carefully. With that said, these data can be modeled by the equation y = 0.87z + 3.95. Use this equation to answer the following; A) If this model is oconsistent, how many murders per 100,000 residents can be expected in a state with 8.7…
2. Use the first 30 data values in Table 1. Test, at the 5 percent level of significance, the hypothesis that men's and women's mean (a) Cholesterol (b) Blood pressure are equal, Table 1 Student Weight Cholesterol Pressure Gender Student Weight Cholesterol Pressure Gender 147 213 127 30 129 194 184 114 2 156 174 116 M 31 111 104 112 193 110 32 156 191 118 4 127 196 110 F 33 155 221 107 F 144 220 130 34 104 212 111 6. 140 183 99 35 217 221 156 M 119 194 112 36 132 103 204 117 139 200 102 F 37 204 121 9 161 192 121 38 171 191 105 M 10 146 200 125 39 135 183 110 11 190 200 125 M 40 249 227 137 M 12 126 199 133 41 185 188 119 M 13 164 178 130 42 194 200 109 M 14 176 183 136 43 165 197 123 M 15 131 188 112 F 44 121 208 100 16 107 193 113 45 124 218 102 17 116 187 112 46 113 194 119 18 157 181 129 M 47 110 212 119 F 19 186 193 137 48 136 207 99 20 189 205 196 113 M 49 221 219 149 21 147 113 50 151 201 109 F 22 112 211 110 F 51 182 208 130 M 23 209 202 97 M 52 151 192 107 M 24 135 213 103 F…
Exhibit 2 The management of a department store is interested in estimating the difference between the mean credit purchase of customers using the stores credit card versus those customers using a national major credit card. You are given the following information: STORES CARD MAJOR CREDIT CARD Sample Size 75 52 Sample Mean $185 $150 Sample Std Dev $12 $8 Q21a = Refer to Exhibit 2. A Point estimate for the difference between the mean purchases of the users of the two credit cards is:
Suppose the observational units in a study are the patients arriving at an emergency room on a given day, Nov 11, 2019. Number of patients that arrive before noon is a qualitative variable is a quantitative variable is not a variable
Solve the attached problem
What is the relative frequency? Give your answer to two decimal places.
4. Given the following observations from a population, calculate the mean, the median, and the mode. 20 15 25 20 10 15 25 20 15
You may need to use the appropriate technology to answer this question. The better-selling candies are often high in calories. Assume that the following data show the calorie content from samples of M&M's, Kit Kat, and Milky Way II. M&M's Kit Kat Milky Way II 250 245 200 210 205 208 230 215 202 220 225 190 250 240 180 Test for significant differences among the calorie content of these three candies. State the null and alternative hypotheses. O H,: Median MM * Mediank * Median ww KK H: Median MM = Mediangk = MedianMw "KK O Ho: Median MM = MedianKK H: Median MM * Median KK * MedianyW Median Mw O Ho: All populations of calories are identical. H: Not all populations of calories are identical. O Ho: Not all populations of calories are identical. H: All populations of calories are identical. O Ho: Median MM = Mediank = MedianMw H: Median MM > Mediankk > Median Mw Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to three…

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