Assume that when adults with smartphones are randomly​ selected, 57%use them in meetings or classes. If 14 adult smartphone users are randomly​ selected, find the probability that fewer than 3 of them use their smartphones in meetings or classes.

Q: In a sample of 1000 U.S. adults, 106 think that most celebrities are great role models. Two U.S.…

A: We can select the first adult in 1000 ways. When the first person is selected then the second person…

Q: Last year, 1,460 calculators were returned to the manufacturer. If 83,000 were produced, assign a…

A: Given: Total number of calculators produced=83,000 Number of calculators returned=1460

Q: There are 18,230,322 veterans in your state. There are 3,055 veterans in your city. What is the…

A: Nstate = 18230322 Ncity = 3055 Probability of selecting a veteran from state, P(S) = 1/18230322.…

Q: If 14% of active duty soldiers in the U.S. Army are women, find the probability that if four…

A: Let X represent the random variable   n=4 p=0.14   X~ Binomial (4, 0.14)

Q: A couple has 4 children. Write out the sample space of genders fort heir children, inorder of birth.…

A: It was stated that a couple has 4 children. The possible gender for each child is either male or…

Q: A company that manufactures computer components has a 3% defective rate. If 12 components are…

A: Givenp=3%=0.03n=12Let "x" be getting no.of defective…

Q: A company that advertises on the radio in a certain area receives on average 11 calls everytime it…

A: Formula : poisson distribution is given by

Q: Suppose a jar contains 5 red marbles and 31 blue marbles. If you reach in the jar and pull out 2…

A: Solution

Q: In a sample of 1000 US adults 106 think that most celebrities are great role models.  Two US adults…

A: Given that, in a sample of 1000 US adults, 106 think that most celebrities are great role models. We…

Q: According to the National Highway Traffic Safety Administration, 83% of Americans used seat belts…

A: In this question it has given that,Probability (that Americans use seat belt belts regularly) =…

Q: If a seed is planted, it has a 95% chance of growing into a healthy plant. If 9 seeds are planted,…

A:

Q: find the probability that exactly 2 people willget enough sleep each night?

A:

Q: The probability that a student in Oakland will receive a B in Kathy Williamson's statistics class is…

A: Given that, The probability that a student in Oakland will receive a B in Kathy Williamson's…

Q: that Serena Williams’ probability of winning a final is her lifetime singles final winning…

A: Consider a random variable X which represent the number of failures before 2 success . X can be…

Q: Imagine you have a bag containing 5 red, 3 blue and 2 orange chips. If drawing without replacement,…

A: Imagine you have a bag containing 5 red, 3 blue and 2 orange chips.

Q: 3 An animal shelter has a 61% adoption rate for puppies. Of all puppies in the shelter, 77% live to…

A: The probability of selecting two items whos individual probability are p and q is given by; P(x)=p·q

Q: In 2017, 39.2% of the total email messages is spam. If 59 email messages from 2017 are randomly…

A: From the given information ,39.2% of the total email messages is spam .ie, P(success) = p = 39.2% =…

Q: A history class is comprised of 5 female and 10 male students . If the instructor of the class…

A: Given: Number of females = 5 Number of males = 10 Total number of students = 5+10…

Q: The centers for disease control reported that 16% of college aged individuals used vapes in…

A: Given information Probability of using vapes = 0.16 No of individuals n = 750 Probability that less…

Q: It is certain that a lacrosse goalie will successfully make a save 91.83% of the time. Suppose that…

A: The probability that a lacrosse goalie will successfully make a save of the time is 0.9183.A sample…

Q: A biologist estimate that 70% of the deer carry a type of tick. For a sample of 300 deer random,…

A: Given P=70% n=300

Q: A box contains 30 calculators of which 7 is defective. If three calculators are selected without…

A:

Q: Suppose a quiz consists of 13 multiple choice questions, each question has four possible answers and…

A: Given : No. of multiple choice questions (n) = 13 Each question has 4 possible answers and 1 of them…

Q: In a study done in my chicken coop, 82% of my birds enjoy eating earwigs. Choose 7 birds at…

A: Let X denote the number birds enjoy eating earwigs. Then X follows a Binomial distribution with n=7…

Q: Time magazine reported that when 19,218 gas masks from branches of the military were tested, it was…

A: The number of masks are tested is 19,218.

Q: If the probability of being hospitalized during a year is 0.25. Find the probability that no one is…

A: X has binomial distribution. X~binomial(n,p)n=3p=0.25probability mass function of X;…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.