Assume that police estimate that 13% of drivers do not wear their seatbelts. They set up a safety roadblock, stopping cars to check for seatbelt use. They stop 40 cars during the first hour.  (a) Find the mean, variance, and standard deviation of the number of drivers expected not to be wearing seatbelts. Use the fact that the mean of geometric distribution is M=1/p and the variance is

Question

Assume that police estimate that 13% of drivers do not wear their seatbelts. They set up a safety roadblock, stopping cars to check for seatbelt use. They stop 40 cars during the first hour. 

(a) Find the mean, variance, and standard deviation of the number of drivers expected not to be wearing seatbelts. Use the fact that the mean of geometric distribution is M=1/p and the variance is

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: According to the​ data, the mean quantitative score on a standardized test for female​ college-bound...

A: It is given that mean and standard deviation are 500 and 50, respectively.

Q: Compute the coefficient of determination. Round your answer to four decimal places. Show work. For a...

A: Coefficient of determination:The coefficient of determination (r) is the percentage of total observe...

Q: A ball is drawn randomly from a jar that contains 9 red balls, 5 white balls, and 5 yellow ball. Fin...

A: a. The probability that the red ball is drawn is 0.4737 and it is obtained below: From the given inf...

Q: Problem 21 c-d The excel spreadsheet is the data

A: Click to see the answer

Q: The lengths of pregnancies are normally distributed with a mean of 266   days and a standard deviati...

A: a) The probability that a pregnancy will last 308 days or longer is 0.0188 and it is calculated belo...

Q: Assume that when adults with smartphones are randomly​ selected, 56​% use them in meetings or classe...

A: Solution:Binomial distribution:The binomial distribution gives the probability of number of successe...

Q: According to an​ almanac, 70​% of adult smokers started smoking before turning 18 years old. If 200 ...

A: We are given,Percentage of adults who started smoking before turning 18 years old= p = 70% = 0.7Samp...

Q: Help with the circled questions on The images please

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will an...

Q: The com reported  the medical doctors’  salary level. The mean salary for the doctor is $250,000 and...

A: It is given that the mean and standard deviation are $250,000 and $100,000, respectively.

Q: Assume that the hourly cost to operate a commercial airplane follows the normal distribution with a ...

A: From the given information, let us define the random variable X as the hourly cost follows normal di...

Q: A random sample of 30 households was selected as part of a study on electricity usage, and the numbe...

A: It is given that sample mean is 375 kWh and standard deviation is 81 kWh.

Q: Will you show me step by step how to answer this, please?

A: Given DataP(X) = X + 0.2For X = 0.07P(X = 0.07) = 0.07 + 0.2 = 0.27For X = 0.16P(X = 0.16) = 0.16 + ...

Q: I am in Prob/Stat!   Find the standard deviation of this probability distribution. Give your answer ...

A: Given data and calculation for standard deviation is shown below

Q: Marian found that the average height of female students in her psychology class was 63 inches with a...

A: According to the provided data,

Q: Running times for 400400 meters are Normally distributed for young men between 1818 and 3030 years o...

A: From the given information, the random variable X as the running times follows normal distribution w...

Q: Please give me the calculator steps.   The lifetime of a certain type of automobile tire (in thousan...

A: Given information:The lifetime of a certain type of automobile tire is normally distributed with N(3...

Q: Problem 21 a-b The excel speadsheet is the data

A: The provided information is:

Q: I have no clue..

A: Given data and calculation for the mean and standard deviation is shown below

Q: Note here that the Y column (minutes spent) is the first, and the X column (number of copiers servic...

A: Hey, since there is multiple sub part questions posted, we will answer first three sub part question...

Q: Please show steps for TI 84 as well.

A: Introduction:Suppose a random variable X has mean μ and standard deviation, σ. Then, the z-score cor...

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who thi...

A: It is given that margin of error (E) is 0.03 and the confidence level is 95%.

Q: Find the IQ Score.  IQ score  0.3446 Distributed with a mean of 100 and a standard deviation of 15. ...

A: Given DataMean = 100Standard deviation = 15Probability of IQ score of adults = 0.3446

Q: A researcher wants to test the association between 4 stress levels and 8 choices of favorite color i...

A: According to the provided data, the researcher wants to test the association between 4 stress levels...

Q: A game has three outcomes. The probability of a win is 0.4, the probability of tie is 0.5, and the p...

A: Given probability are:P(win)=0.4P(tie)=0.5P(loss)=0.1

Q: Will you help me with this one again? When I tried doing it myself, I wasn't getting the correct ans...

A: Solution:Binomial distribution:The binomial distribution gives the probability of number of successe...

Q: the weight of a male baby is less than 2 months old in the united states is normally distributed wit...

A: The 81st percentile of the baby’s weight is obtained below:Let X~N (µ, σ) then the standard z-score ...

Q: If upper overbar X=81​, Upper S=28​, and n=25​,and assuming that the population is normally​ distrib...

A: From the provided information, population is normally distributed with:

Q: According to a recent article the average number of babies born with significant hearing loss (deafn...

A: The probability that exactly for babies were born deaf is obtained below:From the given information,...

Q: Explain the empirical rule in your own words. How many standard deviations would it take for you to ...

A: Empirical rule:About 68% of data lies within the first standard deviation of the mean.

Q: 6. (Sec. 5.1) Two headlights of a car have the following joint pdf for their useful lifetimes X (the...

A: (a) Computation of probability that the lifetime X of the left headlight exceeds 2.8:The probability...

Q: Calibri IU A A 11 6. Because we have students living on campus and eating at the cafeteria for all t...

A: It is given that the ENMU cafeteria is open for 7 days a week and in each week the cafeteria serves ...

Q: Question Help The following data represent the pH of rain for a random sample of 12 rain dates. A no...

A: (a).The point estimate for the population mean is calculated as follows:

Q: Suppose P(E) = 0.3, P(F) = 0.5, and P(E or F) = 0.7. Are the events E and F are mutually exclusive? ...

A: It is given that P(E) = 0.3 and P(F) = 0.5.P(E) + P(F) = 0.3+0.5 = 0.8.

Q: Need answers e though h.

A: Given data is:  Travel   BikeBusDriveOtherWalkTotalEyeBlue03491255Brown31708587Gray001001Green103021...

Q: I need help with problem 37 d and e This is the data set! Right Direction? Not Sure Yes ...

A: 37(c).In the given data, there are 1007 total observations in which 384 are “yes”, 553 are “no”, and...

Q: Use the data in the following​ table, which lists​ drive-thru order accuracy at popular fast food ch...

A: Given Information:OrderABCDTotalOrder Accurate330278232127967Order Not Accurate32593413138Total36233...

Q: A researcher is interested in finding a 98% confidence interval for the mean number of times per day...

A: Assume the standard deviation is given for Sample 104 students.The provided information is:

Q: I lost my notes for solving this sample question for an upcoming exam. Some help reviewing would be ...

A: Given dataTotal no of students = 6No of students who have taken online course last fall = 1No of stu...

Q: what are the characteristics of a population for which it would be appropriate to use mean/median/mo...

A: The measures of centre or measures of central tendency are those descriptive measures that gives the...

Q: Recent statistics suggest that 15% of those who visit a retail site on the World Wide Web make a pur...

A: (a)The likelihood of exactly four purchases is,

Q: For the accompanying data set, (a) draw a scatter diagram of the data, (b) by hand, compute the corr...

A: (a).The scatter plot can be obtained using EXCEL software.Enter the variable x in column A and y in ...

Q: The symbol ∩ represents the intersection of events. The intersection of two events A and B results i...

A: Given dataEvent A = {E1, E4, E6}Event B = { E2, E4, E7}A ∩ B = { E4} 

Q: A dentist wants to see if her patients are waiting in the waiting room on average longer than 15 min...

A: Hypotheses:1.Null hypothesis:H0: µ = 15Alternative hypothesis:H1: µ > 15Since the alternative hyp...

Q: I am working on finding the Q1 and Q3 of this Five Number summary and I am having difficulty finding...

A: The minimum value is 2.10% and is obtained by Excel function “=QUARTILE(C2:C51,0)”, here the column ...

Q: the value used in the equation for the t-test for independent means that approximates the sample siz...

A: In order to compute the test statistic, it is appropriate to approximate the sample size by calculat...

Q: How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in te...

A: (a)The mean of the data is,

Q: An automobile manufacturer finds that 1 in every 2000 automobiles produce has a particular manufactu...

A: Binomial distribution:The events that has exactly two possible outcomes (success or failure) follows...

Q: Twelve jurors are randomly selected from a population of 5 million residents. Of these 5million​ res...

A: (a) The proportion of the jury described is from a minority race is 0.1667 and it is obtained below:...

Q: You estimate a regression equation that estimates individuals’ yearly income as a function of age (m...

A: The provided estimated regression equation is,I = 26.3+4.21×Age+7.21×Education+0.23×IQ

Q: 1) a normal population has mean= 9 and standard deviation=6. what proportion of the population is le...

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will an...