According to a 2017 survey conducted by the technology market research firm The Radicati Group, U.S. office workers receive an average of 121 e-mails per day (Entrepreneur magazine website). Assume the number of e-mails received per hour follows a Poisson distribution and that the average number of e-mails received per hour is five. a. What is the probability of receiving no e-mails during an hour (to 4 decimals)? b. What is the probability of receiving at least three e-mails during an hour (to 4 decimals)? For this question, if calculating the probability manually make sure to carry at least 4 decimal digits in your calculations. c. What is the expected number of e-mails received during 15 minutes (to 2 decimals)? d. What is the probability that no e-mails are received during 15 minutes (to 4 decimals)?

Q: A study from 2014 found that adults in the US spend an average of 11 hours per day watching,…

A: Criteria for checking normality:Drawing histogram:The histogram for the given data is given below:

Q: Suppose that the average waiting time for a patient at a physician's office is just over 29 minutes.…

A:

Q: A study from 2014 found that adults in the US spend an average of 11 hours per day watching,…

A: here the variable is mean time per day spent in engaging media. Here we can clearly see the variable…

Q: The following data represent the monthly phone use, in minutes, of a customer enrolled in a fraud…

A: Solution: The observations in increasing order are 302, 312, 313, 335, 352, 381, 383, 417, 421, 427,…

Q: A study was conducted in 2018 comparing the average earnings (average annual salaries) of US…

A: Solution:

Q: A study from 2014 found that adults in the US spend an average of 11 hours per day watching,…

A: Let µ be the true average time per day watching, reading, listening to or simply interacting with…

Q: 6.59 US Postal Service's performance. The US Postal Service (USPS) reports that 95% of first-class…

A: Confidence level =0.95 Number of successes, x=282200a Sample size, n=332000

Q: 5. ANOVA A consumer magazine wants to compare the lifetimes of ballpoint pens of three different…

A: ANOVA: The analysis of variance (ANOVA) is used to determine whether there are any statistically…

Q: In 1996, there were 572 homicide deaths in Canada (based on data from Statistics Canada). For a…

A: The objective of this question is to find the mean (λ) of homicide deaths per day in Canada in 1996.

Q: minutes) for a sample of patients at offices that do not have a wait-tracking system and wait times…

A:

Q: After examining these data for all the jurisdictions, someone notes that certain areas have an…

A: Statistically speaking an outlier is removed only when the data values are impossible or incorrect .…

Q: A hospital director is told that 32%of the emergency room visitors are uninsured. The director wants…

A:

Q: Listed below are amounts (in millions of dollars) collected from parking meters by a security…

A: Security service company : 1.5,1.8,1.6,1.4,1.6,1.3,1.7,1.5,1.3,1.5Other companies:…

Q: Which measure(s) of central tendency, if any, are presented in this table?

A: The central tendency is a center or middle value of the probability distribution. The most commonly…

Q: Alexa is the popular virtual assistant developed by Amazon. Alexa interacts with users using…

A: (a)The probability there are 2,100 or fewer downloads of amazon Alexa in a day is obtained…

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A: Type of injuries  Frequency(f)  fractures  5200 cuts and bruises  4900 strains and sprains…

Q: Round your all answers to two decimal places. a. What is the point estimate of the difference…

A:

Q: A study from 2014 found that adults in the US spend an average of 11 hours per day watching,…

A: given data of mean time in hours spent on engaging media for randomly selecyed 20 class sections as…

Q: b.  The distribution of productivity level from working-from-home is not symmetrical. Most…

A: Solution :  For given situation , shape of distribution is positively skewed. Positive skewness : It…

Q: The following is a list of 14 measurements. 8, -13, -3, 47, -47, 37, 69, -52, -28, 23, 27, 58, -42,…

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Q: The clerks of the traffic courts at three neighboring towns keep track of the number ot miles by…

A: 8.   From the given information,   Town Mean mph Over Limit Standard Deviation Over Limit…

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Q: Construct a grouped frequency distribution table AND histogram showing the distribution of overall…

A: It is required to construct a grouped frequency distribution, and a histogram of the overall grade…

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A: A contingency table, also known as a cross-tabulation or crosstab, is a type of table in a matrix…

Q: Is a sprint times of 8 seconds unusually slow

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A: To do the test, we will apply an analysis of variance of a factor with three levels, for this we…

Q: TV subscription streaming. “Streaming" of television pro- grams is trending upward. According to The…

A: Denote p as the true fraction of adult TV viewers who are subscription streams.

Q: Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore and recorded the…

A: Given :

Q: Q6. 30 army inductees were given a blood test to determine their blood type. The data set is AB B B…

A: The data on the blood type of the army inductees. NoBloot…

Q: In April of 2012, the Centers for Disease Control and Prevention announced that birth rates for U.S.…

A:

Q: Among fatal plane crashes that occurred during the past 55 years, 348 were due to pilot​ error, 66…

A: The following table represents the relative frequency distribution for the given data.

Q: The fitted line that results from regressions of the Single Index Model is called: a. The security…

A: Estimating the regression equation of the single index model gives us the security characteristic…

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.