QUESTION 14 The number of tweets received by a certain Twitter user is a Poisson random variable with a mean rate of 7.5 tweets per hour. What is the probability that 6 tweets are received in the next two hours? Round your answer to four decimal digits.

Q: You want to obtain a sample to estimate how much parents spend on their kid's birthday parties.…

A: Given Population standard deviations σ=70.06, level of significance ɑ=0.05, margin of error=e=2.76

Q: A random sample of 36 cans of soda is obtained and the contents are measured. The sample mean is…

A: Given Population mean μ=12, n=36, sample mean x̄=12.05, s=0.11

Q: 2. The following Table presents the joint probability distribution for two random variables X and Y.…

A:

Q: Find the following. Enter your answer rounded to at least two decimals. Z/2 for the 88% confidence…

A: GIVEN DATA,WE HAVE TO FIND OUT THE VALUE OF OF Z CRITICAL VALUE FOR GIVEN DATA HERE CONFIDENCE…

Q: A class of eighth graders undertook an ambitious project to compile the most dominant color of…

A:

Q: MEAN=50 STANDARD DEVIATION =7 P(3440)= *Round to 4 decimal as needed*

A: GivenMean(μ)=50standard deviation(σ)=7

Q: A within-subjects design is almost always more powerful than a between-subjects design because it...…

A: The correct option is D. Focuses on difference between conditions instead of difference between…

Q: b) A bag contains 10 cards, of which 2 are marked two, 1 is marked three, 4 are marked four and 3…

A: b) Given that Number of cards with number 2 is 2. Number of cards with number 3 is 1. Number of…

Q: The following data represent the living situation of newlyweds in a large metropolitan area and…

A: <$20,000   $20−35,000   $35−50,000   $50−75,000   >$75,000  total Own home 31…

Q: The accompanying table shows the number of text messages sent and received by some people in one…

A: Please find the explanation below. Thank you.

Q: 4) Let X₁, X₂,..., Xn be mutually independent and identically distributed continu random variables…

A: From the given information, fx=630x41-x4, for 0<x<1 Consider, μ=∫01xfxdx  =∫01x*630x41-x4dx…

Q: Carbohydrates in Fast Foods The number of carbohydrates found in a random sample of fast-food…

A: Data given 30, 38, 39, 40, 41, 43, 44, 46, 47, 51, 53, 61, 62, 63, 73 n=15 Note: According to…

Q: variables X and Y. Using this information answer the questions below. Y=2 4c 2c X=1 X=2 That is, P(X…

A:

Q: Question 1 The personnel manager of a large insurance company wishes to evaluate the effectiveness…

A: Given data: A B C D 66 72 61 63 74 51 60 61 82 59 57 76 75 62 60 84 97 64 55 65 87 78…

Q: The owner of a local movie theater keeps track of the number of tickets sold in each purchase. The…

A: Given data is No. of Tickets 1 2 3 4 5 Probability 0.17 0.55 0.20 0.06 0.02

Q: Suppose that the average number of Facebook friends users have is normally distributed with a mean…

A: From the provided information, Mean (µ) = 113 Standard deviation (σ) = 57 X~N (113, 57)

Q: According to a recent survey, 87% of students say that they do not get enough sleep. Assume the…

A:

Q: A sample of 8 Alzheimer’s subjects had fluency test scores of 11, 10, 6, 3, 11, 10, 9, 11. Assume…

A: Given Information: Sample size n=8 Data values: 11, 10, 6, 3, 11, 10, 9, 11 Assume the subjects…

Q: Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor…

A: Sample size (n) = 10 Level of significance (α) = 0.05

Q: Can you explain how you would know to use t for this problem, using Excel's = confidence.t function…

A: Solution: How to use t for this problem, using Excel's = confidence.t function instead of =…

Q: -9 -8 -7 -0:3- -0-2- 0:4 -0-1-

A: Given information- Population mean, µ = -6 Population standard deviation, σ = 1 Let, X be the random…

Q: Question 12 Applicants for a job sat a health and safety test that had 24 multiple choice questions,…

A: Given: Applicants for a job were given a health and safety test that consisted of 24 multiple-choice…

Q: A pharmaceutical company conducts a study where 50 patients are given a drug. They find that 10…

A: Sample is the subset of the population.

Q: The mean score for one of the classes was found to be 76.5. Which class do you think is more likely…

A: If the distribution is symmetric then mean=median=mode.

Q: Is there an association between party affiliation and​ gender? The accompanying data represent the…

A: Given the data that represents the gender and party affiliation of registered voters based on a…

Q: Find the median of the following data: Element Frequency 14 2 36 5 45…

A: Answer: - Find the median of the following data:                 Element   Frequency c*f 14   2…

Q: Exercise 1: You own two surfboards, a blue one and a purple one. You surf everyday and the…

A: In this case, the events of interest are "using the blue surfboard" (i.e., defined as success) and…

Q: What is the coefficient of determination for Data Set​ B?   Full Data​ Set:    Data Set A Data Set B…

A:

Q: geometric mean of 1, 2, 4, and 10 is a. 4.0.   b. 2.99.   c. 17.0.   d. 4.25

A: Geometric mean,Harmonic mean : x log(x) 1 0 2 0.301 4 0.6021 10 1   ∑log(x)=1.9031

Q: (a) Approximately what percent of the song lengths will last more than 7 minutes? (b) State the…

A: Here given ,  Cumulative relative frequency graph for length of song in minutes.

Q: A pharmaceutical company makes tranquilizers. We wish to find the 89% confidence interval. It is…

A: Data given…

Q: If your score on your next statistics test is converted to a z score, which of these z scores would…

A:

Q: study found that 35% of the assisted reproductive technology (ART) cycles resulted in pregnancies.…

A: It is given that  P( resulted in pregnancy ) = 35% = 0.35 P( multiple birth ) = 22% = 0.22 P( do not…

Q: Suppose a standard die is rolled 10 times. What is the probability that 6 comes up less than five…

A: Given information: A die is rolled 10 times. Number of trials (n)=10 Find: P(X<5)

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 21 for the population…

A: given data  normal distribution σ = 2195% ci for μE = 5n= ?

Q: The heights of adult men in America are normally distributed, with a mean of 69.5 inches and a…

A: given data  men μ1 = 69.5σ1 = 2.65women μ2 = 64.4σ2 = 2.58

Q: It’s September 2017. You are an oil distributor, planning to buy 350,000 barrels of crude oil from…

A:

Q: Males at Minimum Wage Males below Minimum Wage Females at Minimum Wage Females below Minimum Wage…

A:

Q: The number of typing errors made by a typist has a Poisson distribution with an average of three and…

A: 1. Suppose a random variable X defines the number of typing errors made by a typist per page.

Q: construct five example problems with solution using frequency distribution (class interval,class…

A: Given information: Consider the following data: 32, 35, 35, 36, 40, 40, 44, 44, 44, 46, 50, 57, 58,…

Q: Which of these experiments sounds the most like it would be analyzed with a Related-Samples t-test?…

A: In this case, we need to identify the experiment which would be analyzed with a Related-Samples…

Q: children under five who came from a normally distributed population with a mean of 3500 grams and a…

A: Given that.   X~N( μ , ?)   μ=3500     , ?=200  , n=15   Z-score =( x - μ )/?

Q: A data distribution is given as X ~ U(0, 12). Group of answer choices   What is a?…

A: given dataX~U(0,12)

Q: The graph illustrates a normal distribution for the prices paid for a particular model of HD…

A: As per our guidelines we are suppose to answer only three sub parts. Given,mean(μ)=1800standard…

Q: In a sample of 1000 U.S. adults, 198 dine out at a resaurant more than once per week. Two U.S.…

A:

Q: Standardized tests for certain subjects, given to high school students, are scored on a scale of 1…

A: Given Score 1 2 3 4 5 Probability 0.18 0.20 0.26 0.21 0.15

Q: The mean attention span for a ten-year-old in the USA is 19.10 minutes with a standard deviation of…

A: Given that  Level of significance =alpha =0.05

Q: A simple probability distribution for a continuous random variable is called the: O Discrete uniform…

A: Solution-: A simple probability distribution for a continuous random variable is called the (a)…

Q: A traditional test for extrasensory perception (ESP) involves a set of playing cards, each of which…

A:

Q: Draw a pie-chart using the following data: Activity No. of hours School 6 Sleep 8 Playing 2…

A: Given data: Activity Number of hours School 6 Sleep 8 Playing 2 Study 4 TV 1 Others 3