1 answer

Listed below are speeds (in mi/h) of cars on the New Jersey Turnpike by race of...

Question:

Listed below are speeds (in mi/h) of cars on the New Jersey

Turnpike by race of the driver. All cars are going in the same direction, and all of the cars are from New Jersey. The data are from Statlib and the authors are Joseph Kadane and John Lam berth. Find Variance . and find the standard deviation.

79    70    71 76 76    74    71 75 74 74

Group of answer choices

a) s=2.749, Var = 7.55

b) Var= 74 s=2.749

c) mean = 7.4 s=2.749

d) mean = 74 s=2.749


Answers

The sample varince is given by

s2 = (ir - T)/(n -1)

where

} - 740/10 = 74

Thus , variance is

s2 2 =Σ(α – 7402/(10 – 1) = 68/9 = 7.55

Standard deviation is

s= V7.555 = 2.749

Answer is

a) s= 2.749 , Var = 7.55

Calculation :

x (x-74)^2
79 25
70 16
71 9
76 4
76 4
74 0
71 9
75 1
74 0
74 0
sum 740 68
.

Similar Solved Questions

1 answer
1. "compared to the welfare program.Earned Income Tax Credit(EITC) RESULTS IN MORE WORK INCENTIVE"- DO YOU...
1. "compared to the welfare program.Earned Income Tax Credit(EITC) RESULTS IN MORE WORK INCENTIVE"- DO YOU AGREE WITH THIS STATEMENT? JUSTIFY YOUR ANSWER USING GRAPH. 2. Unemployment Insurance Scheme is likely to increase the unemployment rate. why? use graph to explain....
1 answer
3n+3 3 (i.e. let &>0 and determine a n, to satisfy the definition of convergence.) Prove...
3n+3 3 (i.e. let &>0 and determine a n, to satisfy the definition of convergence.) Prove that lim n5n+5 5 Also, show, using algebraic evidence, that it is an increasing sequence....
1 answer
Structuring a Make-or-Buy Problem Fresh Foods, a large restaurant chain, needs to determine if it would...
Structuring a Make-or-Buy Problem Fresh Foods, a large restaurant chain, needs to determine if it would be cheaper to produce 5,000 units of its main food ingredient for use in its restaurants or to purchase them from an outside supplier for $12 each. Cost information on internal production includes...
1 answer
On its highest power setting, a microwave oven increases the temperature of 0.410 kg of spaghetti...
On its highest power setting, a microwave oven increases the temperature of 0.410 kg of spaghetti by 45.0°C in 100 s. (a) What was the rate of power absorption by the spaghetti in W, given that its specific heat is 3.76 x 103 /(kg.)? w (b) Find the average intensity of the microwaves in W/m²...
1 answer
Using PYTHON create a program to allow the user to enter a phrase or read a...
Using PYTHON create a program to allow the user to enter a phrase or read a file. Make your program menu-driven to allow the user to select a option to count the total words in the phrase or file. In addition, provide a menu-selection to count the number of words start with a vowel and a selection t...
1 answer
What would a Michaelis Menton Plot and a Lineweaver-Burke plot look like using this data? Use...
What would a Michaelis Menton Plot and a Lineweaver-Burke plot look like using this data? Use this data for your Test 1 results: Table 1.0 Enzyme concentration Trial 1 (sec) Trial 2 (sec) Enzyme Concentration (Units/mL) 100 units/mL 75 units/mL 50 units/mL 25 units/mL. | 10.30 sec 9.14 sec 8.78 sec ...
1 answer
1) An analysis indicated that the concentration of mercury in a sample of drinking water was...
1) An analysis indicated that the concentration of mercury in a sample of drinking water was 0.680 parts per billion. What quantity of mercury (g) was present in 15.0 L of the water, the density of which is 0.998 g/ml? A) 6.82 B) 1.72 x 10-8 C) 6.07 x 10-3 D) 1.06 x 10-6 E) 3.45 x 10-4 F) 4.54 x 10-...
1 answer
Consider the Pisaster Sea Star Study by Paine (1966) to answer the following questions. Please label...
Consider the Pisaster Sea Star Study by Paine (1966) to answer the following questions. Please label parts of your answer with each number and write in complete sentences. 1. Define the Competitive Exclusion Principle. 2. What were the TWO main results of this study on community structure by Paine (...
1 answer
What is the phase where cytokinesis occurs?
What is the phase where cytokinesis occurs?...
1 answer
Find "s" if 112s12 = 2.65 x 1010. s = __________ Enter your numerical answer to...
Find "s" if 112s12 = 2.65 x 1010. s = __________ Enter your numerical answer to three significant figures....
1 answer
What are special-purpose registers? give three examples of special-purpose registers and explain how each is used....
what are special-purpose registers? give three examples of special-purpose registers and explain how each is used. define word size. what are the advantages and disadvantages of increasing word size? how does multiprocessing impove a computer's efficiency?...
1 answer
Use the method of "undetermined coefficients" to solve the 2nd ODE #y''+4y'+4y=e^(-2x)sin2x# ?
Use the method of "undetermined coefficients" to solve the 2nd ODE #y''+4y'+4y=e^(-2x)sin2x# ?...
1 answer
Question 12 (0.5 points) Saved Which of the following is NOT an example of moral hazard?...
Question 12 (0.5 points) Saved Which of the following is NOT an example of moral hazard? farmers neglect their livestock in order to obtain an insurance payout O farmers refuse to invest in new and potentially improved agricultural technologies due to insurance O patients go to the doctor more than ...
1 answer
After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40, a...
After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40, a student found that her best fit linear line for FD&C Red 40 was y= 2,896x + -0.004. Her Kool-Aid sample had an absorbance of 0.842. If 0.484 grams of Kool-Aid powder was used to prepare an 8-fl oz...
1 answer
List 2 reasons why elderly people are more at risk for fractures?
List 2 reasons why elderly people are more at risk for fractures?...
1 answer
Calculator Rodgers and Winter had capital balances of $60,000 and $90,000, respectively, at the beginning of...
Calculator Rodgers and Winter had capital balances of $60,000 and $90,000, respectively, at the beginning of the current fiscal year. The articles of partnership provide for salary allowances of $25,000 and $30,000, respectively; an allowance of interest at 12% on the capital balances at the beginni...
1 answer
1) The grades of students in a class are distributed normally. The average grade of the...
1) The grades of students in a class are distributed normally. The average grade of the students in this class is 65; standard deviation is 2. The students who take the teacher give more points by making "systematic error". What is the passing score since it gives more than 25% of the class ...
1 answer
A chemical engineer is studying the two reactions shown in the table below. In each case,...
A chemical engineer is studying the two reactions shown in the table below. In each case, she fils a reaction vessel with some mixture of the reactants and products at a constant temperature of 134.0 "C and constant total pressure Then, she measures the reaction enthalpy AH and reaction entropy ...