4A random sample of m = 10 regions in New England gave the following violent crime rates (per millionpopulation).X₁: New England Crime Rate3.3 3.9 4.2 4.1 3.3 4.1 1.8 4.8 2.9 3.1Another random sample of m2 = 12 regions in the Rocky Mountain states gave the following violent crimerates (per million population).X₂: Rocky Mountain Crime Rate3.54.1 4.7 5.5 3.3 4.8 3.5 2.4 3.1 3.5 5.2 2.8USE SALTAssume that the crime rate distribution is approximately normal in both regions. Do the data indicate thatthe violent crime rate in the Rocky Mountain region is higher than in New England? Use x = 0.01. Solvethe problem using both the traditional method and the P-value method. (Test the difference μ ₁ - μ 2.Round the test statistic and critical value to three decimal places.)1test statisticcritical value

The data for the violent crime rates in New England and Rocky Mountain are given.

Answered: 4 A random sample of m= 10 regions in…

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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A statistical program is recommended. A paper gave the following data on n = 11 female black bears. Age(years) Weight(kg) Home-RangeSize (km2) 10.5 54 43.0 6.5 40 46.6 28.5 62 57.4 6.5 55 35.7 7.5 56 62.0 6.5 62 33.8 5.5 42 39.7 7.5 40 32.3 11.5 59 57.2 9.5 51 24.3 5.5 50 68.6 (a) Fit a multiple regression model to describe the relationship between y = home-range size and the predictors x1 = age and x2 = weight. (Round your numerical values to four decimal places.) = (b) If appropriate, carry out a model utility test with a significance level of 0.05 to determine if at least one of the predictors age and weight is useful for predicting home range size. State the null and alternative hypotheses. H0: ?1 = ?2 = 1Ha: at least one of ?1 or ?2 is not 1.H0: At least one of ?1 or ?2 is not 1.Ha: ?1 = ?2 = 1 H0: ?1 = ?2 = 0Ha: at least one of ?1 or ?2 is not 0.H0: At least one of ?1 or ?2 is not 0.Ha: ?1 = ?2 = 0 Calculate the test…
3. It has been claimed that over 30 percent of entering college students have blood cholesterol levels of at least 200. Randomly select 20 students in the list in Table 1 to test this hypothesis. What conclusion do the 5 percent level of significance?
1.11 A quick survey gives the price—an estimated average for a 170-gram can—for 14 different brands of water-packed light tuna, based on prices paid nationally in supermarkets. 1.01 1.92 1.22 0.84 0.65 0.52 1.41 1.14 0.65 0.66 0.71 0.60 0.61 0.67 Find the average price and average median price for the 14 different brands of tuna. (Round your answers to two decimal places and show answers.) Based on your findings, do you think that the distribution of prices is skewed? Explain. a) Since the median is higher than the mean, the distribution is slightly skewed to the left. b) More information is needed to determine skewness. c) Since the mean is higher than the median, the distribution is slightly skewed to the right. d) Since the mean and median are equal, the distribution is not skewed.
1.18 Cats on YouTube. Suppose you want to estimate the percentage of videos on YouTube that are cat videos. It is impossible for you to watch all videos on YouTube so you use a random video picker to select 1000 videos for you. You find that 2% of these videos are cat videos. Determine which of the following is an observation, a variable, a sample statistic (value calculated based on the observed sample), or a population parameter
3. On the average 35 % of the people afflicted with a certain disease die from it. Under a new treatment only 22% out of 200 patients die from it. Using a 0.05 level of significance, ca we say that the new treatment is effective?
3. Can SAT scores predict college performance? Let x be a variable that represents SAT score of a computer science major, and let y be a variable that represents a student’s GPA upon graduation. A random sample of n =15 computer science majors provided their SAT scores and GPAs: x 1232 1070 1086 1287 1130 1048 1121 1095 1135 1208 1333 1160 1186 1243 1261 y 3.52 2.91 2.4 3.47 3.47 2.37 2.4 2.24 3.02 3.32 3.59 2.54 3.19 3.71 3.58 The scatter diagram for the SAT score and GPA is given below: (a) Find the sample correlation coefficient r. Truncate to two decimal places. What does the value tell you about the data? (b) Find the equation of the least squares line . Truncate to four decimal places. What does the slope mean? (c) Find the value of the coefficient of determination . Truncate to two decimal places. What does this number mean? (d) What is the predicted GPA if a computer science major got a…
what is 1. P value 2. Z value 3. Critical value 4. Reject or do not reject 5. State conclusion
35. Statistics students in Oxnard College sampled 10 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below: Number of Pages (xx) Cost(yy) 757 134.55 538 106.7 782 142.3 461 83.15 597 116.55 372 74.8 328 75.2 480 92 978 154.7 261 58.15 A student calculates a linear modely = x + . (Please show your answers to two decimal places)Use the model to estimate the cost when number of pages is 849.Cost =$ (Please show your answer to 2 decimal places.)

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