According to a survey, only 15% of customers who visited the web site of a major retail store made a purchase. Random samples of size 100 are selected. What is the probability that the sample proportion will have between 20% and 35% of customers who will make a purchase after visiting the web site?

Q: There were 20 multiple choice questions on Exam 2. The probability of getting the right answer on…

A: Given Information: n=20p=25%=0.25To find out the probability that a student who did not study would…

Q: Find the probability of getting 2 to 5 diamonds using normal distribution.

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Q: According to the National Center for Education Statistics, 17% of all people in the United States,…

A:

Q: A recent survey reported that 47​% of​ 18- to​ 29-year-olds in a certain country own tablets. Use…

A: According to the given information,Probability of success, p = 47% = 0.47Number of trials, n = 6Let…

Q: The mean height of women in a country (ages 20 - 29) is 64.1 inches. A random sample of 55 women in…

A:

Q: If the probability of choosing a red chip from a bucket is 0.4, What is the probability of not…

A: We have the probability of choosing a red chip from a bucket is 0.4

Q: A newspaper survey found that 65% of readers found online tutorials useful. If a random sample of 9…

A: We have given that a Binomial distribution with parameters p=65% = 0.65 , q=1-p = 0.35 and sample…

Q: Based on past experience, a bank believes that 7% of the people who receive loans will not make…

A:

Q: The probability of a radar station detecting an enemy plane is 0.55. If 60 stations are in use, what…

A: The binomial distribution is given by,   P(X=x) = Cxn . px . qn-x ; x = 0, 1, 2, ....…

Q: Based on a smartphone​ survey, assume that 51​% of adults with smartphones use them in theaters. In…

A:

Q: A traffic light is set to switch from red to green according to a uniform distribution with a mean…

A: The cumulative density function for uniform distribution is  F(X)=x-ab-a The mean of uniform…

Q: each score in a random sampling distribution represents what

A: We have given that  We have to define each score in a random sampling distribution :

Q: Assume that 15% of 14 year olds believe in spending their money as opposed to saving it. a) Find…

A: Let, X=the number of 14 year old who believes in spending their money as opposed to saving…

Q: 16 of the 200 digital video recorders​ (DVRs) in an inventory are known to be defective. What is the…

A: Given that, 16 of the 200 digital video recorders​  (DVRs) in an inventory are known to be…

Q: A study showed that ​69.7% of occupants involved in a fatal car crash wore seat belts. Of those in a…

A:

Q: Based on a smartphone survey, assume that 56% of adults with smartphones use them in theaters. In a…

A: Given information- We have given a problem of binomial distribution. We have given that 56% of…

Q: Among 110 Grade 9 students at a public high school, only 25 are athletes. if 10 of the students are…

A: The sample of the number of students is n=10. The probability of 25 students are athlete,…

Q: A recent survey reported that 47​% of​ 18- to​ 29-year-olds in a certain country own tablets. Use…

A:

Q: In a country, a day can be either rainy or sunny. The probability of a day being rainy is 40.0% .…

A: In question, Given that In a country, a day can be either rainy or sunny. The probability of a day…

Q: A recent survey reported that 50​% of​ 18- to​ 29-year-olds in a certain country own tablets. What…

A:

Q: In a study done in my chicken coop, 82% of my birds enjoy eating earwimgs. Chose 7 at random. FIND…

A: The provided information are: Probability of success (p)  = 82% = 0.82 Number of birds chosen (n) =…

Q: Suppose that 20% of fruit flies possess a certain gene.  If we randomly select 20 fruit flies, find…

A: Here given that 20% of fruit flies possess the gene. In a sample of 20 we need to find the…

Q: In a large population, 59%6 are infected with a certain disease. If you take a random sample of 30,…

A: Given,n=30p=0.59Let x=no.of people infected with certain disease.x~Binomial(n=30 , p=0.59)P(X=x)=Cx…

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 and the number of female students is 20.

Q: It is determined that 62% percent of Grade 12s attend school in a particular urban school district.…

A: Given : n = 500 p = 0.62 q = 1 - p  q = 1-0.62 q = 0.38 Here n×p and n×q is greater than 5. hence we…

Q: A survey of 400 randomly selected high school students determined that 286 play organized sports.…

A: The objective of this question is to find the probability that a randomly selected high school…

Q: A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while driving…

A:

Q: The length of a fully grown plant is normally distributed and has a mean of 35cm. It is found that…

A: Solution: Let X be the length of a fully grown plant. From the given information, X follows normal…

Q: When making random guesses on an 8 question quiz the probability of guessing correctly on any one…

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Q: university study involves a simple random sample of 26 students taken from a population of​ 12,550.…

A: Given that Simple random sample size (n) = 26 Population size  = 12,550 Undergraduate students make…

Q: A survey on customer satisfaction at a bank is carried out by asking everyone who visits the bank on…

A: Sampling methods: In simple random sampling, all the units in the population have equal chance of…

Q: Based on a smartphone survey, assume that 43% of adults with smartphones use them in theaters. In a…

A:

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 and the number of female students is 20.

Q: When a sample contains 100 or more cases, what is the correct probability distribution to use?

A: Given: When a sample contains 100 or more cases, what is the correct probability distribution to…

Q: A survey of U.S. adults ages 18-29 found that 92% use the internet. You randomly select 100 adults…

A: Given that:Success probability, p = 0.92Sample size, n = 100

Q: According to CTIA, 41% of all U.S. households are wireless-only households (no landline). Choose…

A: From the provided information, 41% of all U.S. households are wireless-only households (no landline)…

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.