The Federal Bureau of Investigation reports state-level and national data on crimes.  An investigator compares the incidence of crime in the United States in 1991 and in 2001.  In 1991, there were 28,000 crimes compared with 22,000 in 2001.  Can you conclude that the US became more law-abiding over that time period?

Q: Bella makes the first quartile salary for an Actuary. Ellie makes the third quartile salary for a CP…

A: given data,boxplot shows salaries for actuaries and CPAsCPA     minimum = 30 Q1              = 40 Q2…

Q: Calcuate a three-period moving average forecast for June

A: Given: Period Actual Jan 545 Feb 567 Mar 568 Apr 561 May 476

Q: An academic department with five faculty members-Anderson, Box, Cox, Cramer, and Fisher-must select…

A: given data five members : anderson,box,cox,cramer,fisher select two person at random.

Q: Consider the following data: Monthly Profit of a Gym Month Jan-12 Feb-12 Mar-12 Apr-12 May-12…

A: Given that, Monthly Profit of a Gym : Month Jan-12 Feb-12 Mar-12 Apr-12 May-12 Jun-12 Jul-12…

Q: 12. The average waiting time to be seated for dinner at a popular restaurant is 2 standard deviation…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Company A produces 10% defective products, Company B produces 20% defective products and C produces…

A: Hint: All three companies are equally likely to be selected, therefore their probability of getting…

Q: The probability of an electronic sensor malfunctioning is known to be 0.10. A random sample of 12…

A: Hint: use binomial distribution to find mean (expected value ) and standard deviation of the number…

Q: applicants are given a test of physical fitness. The scores are ean of 64 and a standard deviation…

A:

Q: III. Mean, Variance and Standard Deviation of Discrete Random Variable bers (15-17). Determine the…

A: We have to find mean and Sd for given data.  As per guideline expert have to answer one question…

Q: A random variable, y, has a known probability distribution given by :y=2, 4, 6,8,10 and P: 0.17,…

A: y P(y) 2 0.17 4 0.23 6 0.2 8 0.3 10 0.1

Q: Could you please tell me if my work is correct?   Forbes magazine published data on the best small…

A:

Q: Having the text (A A A BA CBCCBBAAADB B B C D). Find The information content in (C) O a. 4/20 O b.…

A:

Q: Suppose that 16% of the population of the U.S. is left-handed. If a random sample of 185 people from…

A: We have given that p = 0.16 n = 185 Here X~ Binomial (n, p)   = >  X~ Binomial (185, 0.16)

Q: Suppose 2000 students did an exam so the list of 2000 exam marks is a quantitative variable X. Also…

A:

Q: Feeling lucky? I bet that at least two students in our class share a birthday (not including year).…

A: Given information: Number of students in the class = 40 students

Q: e a sample of 306 suspected crimina 85% confidence interval for the pop O Most Wanted list. Round…

A: We need to construct the 85% confidence interval for the population proportion.  A confidence…

Q: te the means and standard deviations of:1, 2, 3, 4, 5 O a. mean = 3; st. dev. = 1.414 b. mean = 3;…

A: x 1 2 3 4 5 ∑x = 15

Q: Three transistors are tested. The probability that none of them works is 0.97. What is the…

A:

Q: Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an…

A: Let X be the Farm-raised trout contain an average (mean) of 32 grams of fat per pound, with a…

Q: A county clerk was supposed to use randomness to assign the order in which candidates' names…

A: The probability of a result that low is 0.003213.

Q: in a sample space S, if P(a) = 0, then A is independent of any other event. False O a. O b. True

A: Given that Sample space S if P(a)=0 then A is independent of any other event .. True or False ..

Q: Among 450 randomly selected drivers in the 20-24 age bracket, 7 were in a car crash in the last…

A: The total drivers are 450 in which 7 were in a car crash in the last year.

Q: Find the z-score that best satisfies the condition. This problem can be solved using technology or…

A:

Q: 3. Given the data set, show all of your work and answer the questions below. Weights of Candy Bags…

A: Weights of candy bags given We have to calculate Percentile and value for given percentile Formula…

Q: The probability distribution for the random variable, x, is x:2, 2.5,3.0,3.5,4.0 ,4.5 and P(x):0.07,…

A: X 2 2.5 3 3.5 4 4.5 Total P(X=x) 0.07 0.36 0.21 0.19 0.10 0.07 1

Q: The probability a machine has a lifespan of more than 5 years is 0.8. Ten machines are chosen at…

A: given data  probability of lifespan more than 5 years = p = 0.8 n = 10 machines selected x = no. of…

Q: The salaries of a company's employees are normally distributed with mean 15000 and standard…

A:

Q: a sample space S, it P(a) = = 0, then A is dependent of any other event. O a. b. False True

A: We have given that,  In a sample space S, if P(a) = 0, then A is independent of any other event?…

Q: Let A denote the event of placing a $1 straight bet on a certain lottery and winning. Suppose that,…

A: General formula of probability is ,    Probability =Number of favorable outcomes Total outcomes

Q: When randomly selecting an adult, A denotes the event of selecting someone with blue eyes. What do…

A: Complementary events:   Let A denote an event defined, and then the complement of the event A is…

Q: The random variable given in the accompanying table is because

A: Here given for the Probability distribution of Number of girls.

Q: A discrete random variable has probability distribution: x= 1, 2,3,4, 5 and P(x) =0.12,0.15, 0.23,…

A: given data <a discreate variable  has a probability distribution here  x = 1,2,3,4,5p(X) =…

Q: Suppose a survey conducted in 2012 asked a group of adults from a certain country whether they drink…

A: We define the sample statistics as: A sample statistic is a numerical measure of a sample. A…

Q: A stream of data consists of four characters A, B, C, D with probabilities 0.1, 0.3, 0.2, 0.4,…

A: Given a stream of data consists of four characters A, B,C and D with probabilities 0.1,0.3,0.2,0.4.…

Q: Find the number of ways of arranging the letters of the words DANGER, so that no vowel occupies odd…

A:

Q: How would you BEST describe the results? There is a main effect of outcome: People who received the…

A: 1. There is an interaction between outcome and ambivalence, so this is false. 2. This is false. Low…

Q: The cumulative relative frequency table for a set of data is shown below. What is the missing…

A: Frequency is the number of times a observation happen. Relative frequency corresponds to the…

Q: 2. Approximately, the normal distribution in an examination in statistics has a mean of 78 and a…

A: Hi there! Since there are multiple questions we have solved the first question for you. To get the…

Q: Engineers in a design department are assessed by their leader. A 'O' is 'Terrible' and a '5' is…

A: Given that: Score Number of staff 0 2 1 5 2 6 3 9 4 4 5 3

Q: Rodica's tests her theory with multiple hypotheses. She uses many different operational definitions…

A: This is a form of replication. Replication of an experiment means conducting the same experiment in…

Q: XYZ hospital is examining its readmission rate within one month of discharge by periodically…

A: Given information, Sample pi^ 1 0.01 2 0.04 3 0.01 4 0.03 5 0.02 6 0.01 7 0 8…

Q: in a sample space S, if P(a) = 0, then A is independent of any other event. O a. False O b. True

A: Given S be the sample space  a be the event P(a)=0

Q: The probability distribution for the random variable, x, is x:2, 2.5,3.0,3.5,4.0,4.5 and P(x):0.07,…

A:

Q: If A and B are independent events and P(A)=0.25 and P(B)=-0.333, what is the probability P(ANB)?…

A: It is given that P(A) = 0.25, P(B) = 0.333

Q: Seth asked a random sample of 20 students how much cash they had in their pocket. The following…

A: given data,n = 20here we have to find out the sample standard deviation for grouped data, x f fx…

Q: dread 1 2 3 4 5 Total of dread. proportion 0.158 0.407 0.310 0.088 0.037 1

A: Given that  Dread (X) Proportion (P(x)) 1 0.158 2 0.407 3 0.310 4 0.088 5 0.037

Q: Data was collected for 300 fish from the North Atlantic. The length of the fish (in cm) is…

A: Solution- From given bar graph Class (length of fish in cm) frequency  220-222   222-224…

Q: During one shift, the express lane clerk recorded how many times customers violated the "10 items or…

A: We have given the following histogram

Q: for the binary system if the entropy =0.9710, so the probabilities are:

A:

Q: The height (in feet) and volume (in cubic feet) of usable lumber of 32 cherry trees are measured by…

A: The scatterplot of usable lumber volume vs tree height is given.