Probability that 30% of the people prefers online shopping. What is the probability that
out of 8 persons selected at random at a park?
i. Exactly 3 prefer online shopping
ii. At-least 6 prefer online shopping
iii. Less than mean number of people prefer online shopping
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A survey of 30 people revealed the following preferences. Prefers Family FeudPrefers Deal or No DealTotalWomen7310Men51520Total121830 A person is chosen at random from the sample. Find the probability that the person chosen:i) Prefers Family Feud. [2]ii) Is either a woman or prefers Deal or No Deal. [3]iii) Prefers Family Feud given that the person is male. [3]
Let X be normally distributed with mean 100 cm and standard deviation 5 cm.
(a) On the diagram below, shade the region representing P(X > 105).
(2)
(b) Given that P(X < d) = P(X > 105), find the value of d.
(2)
(c) Given that P(X > 105) = 0.16 (correct to two significant figures), find P(d < X < 105).
(2)
(Total 6 marks)
2. A test has five questions. To pass the test, at least three of...
1. in the entire u..s it has been found that 2/3 of the people prefer dogs over cats. you call 12 people selected at random from the entire population . whats the probability that exactly 8 people will prefer dogs? 2. you go to a meeting where 21 people are assembled and it so happens that 14 of these people prefer dogs to cats.. the 21 names are put in a bowl and well mixed. you draw 12 names out...
1. In a typical day, 72% of people in the United States with internet access go online to get news a) In a random sample of 5 people in the United States with internet access, what is the probability that the number going online to get news is less than 3? b) In a random sample of 5 people in the United States with internet access, what is the probability that the number going online to get news is at...
In a firm there are 3 sales group according to the regions: Group I, Group II, and Group III. There are 100 sales consultant in this firm. There are 34 sales consultant in Group I, 29 in Group II, and 30 in Group III. There are 12 consultants that are in both Group I and Group II, 18 that are in both Group I and Group III, and 8 are in both Group II and Group III. In addition, there...
40% of consumers prefer to purchase electronics online. You randomly select 8 consumers. Find the probability that the number of consumers who prefer to purchase electronics online is (a) exactly five, (b) more than five, and (c) at most five. (a) Find the probability that the number that prefer to purchase electronics online is exactly five. P(5)= (Round to three decimal places as needed.)
Suppose that the probability that a person books an airline ticket using an online travel website is 0.79. For the question that follows, consider a sample of ten randomly selected people who recently booked an airline ticket. 1. What is the probability that exactly eight out of ten people used an online travel website when they booked their airline ticket? 2. What is the probability that at least nine out of ten people used an online travel website when they...
3. Past records indicate that the probability of online retail orders that turn ut to be fraudulent is 0.08. Suppose that, on a given day, 8 online retail orders are placed. Assume that the number of online retail orders that turn out to be fraudulent is distributed as a binomial random variable. a. What is the probability that less than two online retail orders will turn out to be fraudulent?
The
average annual precipitation for a large midwest city is 30.85
inches with a standard deviation of 3.6 inches. Assume the variable
is normally distributed. Find the probability that the mean of a
random sample of 32 months will have a mean less than 30
inches.
Find less than 30 inches the probability that the mean of a random sample of 32 months will have a mean An insurance company says that 15% of all fires are caused a) Find...
5.what is the probability that more than 2, but fewer than 6
people live in a randomly selected household?
6.What is the probability that 3 or 4 people live in a randomly
selected household?
7.Two US households are selected at random. What is the
probability that in both households there are 7 or
more people?
8.Two US households are selected at random. What is the
probability that in both households there are more
than 3 people?
Imagine selecting a US...