A random sample of 50 observations on the waiting time (in seconds) of customersbefore speaking to a representative at a call center is as follows:29.432.233.236.529.538.136.030.430.031.528.429.134.533.627.431.832.332.630.429.828.234.630.731.927.534.932.827.728.428.828.530.226.827.830.531.829.2.28.627.528.530.831.829.126.934.233.527.428.534.830.5(a) Construct a histogram and comment on the process.(b) What assumptions are necessary to test if the mean waiting time is less than32 seconds?

a) The output of the histogram is:

Answered: A random sample of 50 observations on…

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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The owner of Maumee Ford-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year. Age Car (years) Selling Price (S000) 10 10.8 9.1 3. 12 16 4.3 4. 5.0 5.1 11.5 11.6 13 8.0 8.0 12 10 16 3.9 12.8 11.1 11 12 Dicture Click here for the Excel Data Fle 6. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) be b. Estimate the selling price of an 9-year-old car in $000) (Round your answer to 3 decimel places)
The following are the ratings of males by females in an experiment involving speed dating. Use the given data to construct a boxplot and identify the 5-number summary. 3.0 3.0 4.0 4.0 4.0 4.0 5.0 5.0 5.0 5.0 5.0 6.0 6.5 6.5 6.5 6.5 7.0 7.0 8.0 8.5 The 5-number summary is. OO, and (Use ascending order. Type integers or decimals. Do not round.) Which boxplot below represents the data? O A. В. 0. 4 6. 8 10 E 10 E 8. Ratings Ratings С. D. 2 9. 8 10 0. 2 4 6. 8. 10 E Ratings Ratings
Q. 1 Independent random samples of 15 mid-western and 14 southern households provided the following data for household vehicle miles of travel in thousands. Midwest South 16.2 12.9 17.3 22.2 19.2 9.3 14.6 18.6 10.8 24.6 20.2 15.8 11.2 16.6 16.6 18.0 12.2 20.1 24.4 20.3 20.9 16.0 17.5 18.2 9.6 15.1 18.3 22.8 11.5 At the 5% significance level, does there appear to be a difference in the mean for Midwestern and southern households? Note: x, = 16.23 S, = 4.06 = 17.69 2. = 4.42 and K = .05 X >°, n,= 15 ,= 16.23 5, =4.06 M2= 14 7,= 17.69 $2=4.42 Sp (n,-1) s?+(nz-i)s? Step I- H, :M,=Mq Hai M, #Mz step 2: L = df = nit ngrZ Stet 4 : Cristical Valme = ( Two-sided test) Step 5: Compare test statistic to coitical value 2o you rejeet Null or Do not veject Null ? Step 6 : Wmite your conelusion below;
Suppose a group is interested in determining whether teenagers obtain their drivers license at approximately the same average age across the country. Five teenagers from each region of the country were randomly selected. The data collected is their age at which the teenagers obtained their drivers licenses and is summarized in the table below. Test the hypothesis that the five regions produce the same mean average for a teenage driver’s license. Northeast South West Central East 16.3 16.9 16.4 16.2 17.1 16.1 16.5 16.5 16.6 17.2 16.4 16.4 16.6 16.5 16.6 16.5 16.2 16.1 16.4 16.8 (a)What are the hypotheses? (b)What is the F – Statistic? (c) What is the p – value? (d) What can you conclude about the null hypothesis? (e) What can you conclude about the population means?
Use the data (a sample of 20 banks) given below to answer the following question(s). financial Obs condition TotCap/Assets TotExp/Assets TotLnsLses/ Assets 1 1 9.7 0.12 0.65 2 1 1 0.11 0.62 3 1 6.9 0.09 1.02 4 1 5.8 0.1 0.67 1 4.3 0.11 0.69 6. 1 9.1 0.13 0.74 7 1 11.9 0.1 0.79 8 1 8.1 0.13 0.63 9 9.3 0.16 0.72 10 1.1 0.16 0.57 11 11.1 0.08 0.43 12 20.5 0.12 0.8 13 9.8 0.07 0.69 14 7.9 0.08 0.53 15 9.6 0.09 0.73 16 12.5 0.09 0.3 17 18.3 0.08 0.49 18 7.2 0.11 0.55 19 14 0.08 0.44 20 8.3 0.08 0.51 The "Financial Condition" column records the judgment of an expert on the financial condition of each bank. This dependent variable takes one of two possible values--weak or strong ---according to the financial condition of the bank. The predictors are two ratios used in the financial analysis of banks: TotLnsLses/Assets is the ratio of total loans and leases to total assets, and TotExp/Assets is the ratio of total expenses to total assets. The target is to use the two ratios for classifying the…
The following data represent exam scores in a statistics class taught using traditional lecture and a class taught using a "flipped" classroom. Complete parts (a) through (c) below. Traditional 69.8 69.1 79.6 68.1 85.5 77.7 55.9 2 80.4 82.0 71.5 63.2 70.7 59.6 Flipped 77.1 70.6 63.2 71.7 78.5 92.1 78.7 76.2 81.0 69.8 92.7 78.2 76.9 (a) Which course has more dispersion in exam scores using the range as the measure of dispersion? The traditional course has a range of while the "flipped" course has a range of. The V course has more dispersion. (Type integers or decimals. Do not round.)
The following table contains the first exam score and the second exam score for a random sample of 15 students in a large college class. 78 89 75 89.5 86 84 81 77 79 84.5 82.5 83.5 78.5 75.5 85 First exam score 83 82.5 71.5 86.5 79 81 71.5 84.5 Second exam score 78.5 84 71.5 85 72.5 72.5 78 5 -5.5 3.5 6.5 4.5 Difference (a) Find the value of the test statistic. (b) Find the critical value. (c) Decide whether to reject Ho (Choose one) 4 0 Yes ▼ I Don't Know At the 0.02 level of significance, can we conclude (by using the Wilcoxon signed-ranks test) that there is a difference between the populations of first and second exam scores for students in this class? Perform a test by completing the parts below. (If necessary, consult a table with critical values for the Wilcoxon signed ranks test.) 8.5 No 4.5 Submit 1 1.5 0 PRO 3 (d) At the 0.02 level, can we conclude that there is a difference between the populations of first and second exam scores for students in this class? 7 3 F6 X F7 2022…
The following data represent exam scores in a statistics class taught using traditional lecture and a class taught using a "flipped" classroom. Complete parts (a) through (c) below. Traditional 71.8 68.6 80.5 67.6 86.0 77.2 56.8 O 81.2 82.0 71.0 64.1 70.6 60.4 Flipped 76,5 70.6 62.7 71.3 78,2 92.1 79.9 77.7 82.4 69.6 92.2 78.9 76.1 (b) Which course has more dispersion in exam scores using the sample standard deviation as the measure of dispersion? The traditional course has a standard deviation of while the "flipped" course has a standard deviation of The course has more dispersion.
The owner of Maumee Motors wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at Maumee Motors during the last year: Car Age (years) ($ thousands) 4 Selling Price $3.1 Selling Price Car Age (years) ($ thousands) 4 $3.6 22544 123456 TITT 4.2 6.0 9.4 4.6 4.9 a. Determine the correlation coefficient. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.) r = b. Determine the coefficient of determination. (Round the final answer to 3 decimal places.) c. Interpret these statistical measures. Does it surprise you that an inverse relationship exists? (Round the final answer to the nearest whole number.) Weak negative (inverse) correlation between age of car and selling price. So, explained by the variation in the age of the car. percent of the variation in the selling price is
The following data represent exam scores in a statistics class taught using traditional lecture and a class taught using a "flipped" classroom. Complete parts (a) through (c) below. Traditional 71.0 68.3 78.8 68.2 86.4 77.4 56.8 80.8 80.8 72.4 64.2 70.6 60.7 Flipped 75.5 70.5 64.3 71.5 78.0 93.2 79.5 76.2 82.4 70.4 91.6 77.2 76.9 The traditional course has a standard deviation of, while the "flipped" course has standard deviation of The traditional course has more dispersion. (Round to three decimal places as needed.)
The following are the ratings of males by females in an experiment involving speed dating. Use the given data to construct a boxplot and identify the 5-number summary. 2.02.03.04.05.05.06.06.06.06.06.07.08.08.08.08.08.58.58.58.5
Consider the distribution of scores of 15 students: 83, 72, 87, 79, 75, 82, 76, 77, 73, 86, 81, 79, 82, 79, 74. 6. The median score is... 7. The mean score is... 8. The mode is... 9. The given distribution is...

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