At a certain supermarket, 30% of customers pay by credit card. Find the probability that in...
At a certain supermarket, 30% of customers pay by credit card. Find the probability that in a randomly selected sample of 20 customers,
a) Exactly four pay by credit card
b) At least four pay by cash
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At a certain supermarket, 30% of customers pay by credit card.
Find the probability that in...
According to a survey, 23.8 % of credit-card-holding families in a certain area hardly ever pay...
According to a survey, 23.8 % of credit-card-holding families in a certain area hardly ever pay off the balance. Suppose a random sample of 29 credit-card-holding familles is taken. Find the probability that at least 4 families hardly ever pay the balance The probability that at least 4 families hardly ever pay off the balance is. (Round to four decimal places as needed.)
According to a survey, 23.8 % of credit-card-holding families in a certain area hardly ever pay off...
5.11. It is known that 30% of all customers of a major credit card pay their...
5.11. It is known that 30% of all customers of a major credit card pay their bills in full before any interest charges are incurred. Suppose a simple random sample of 150 credit card holders is selected. (Note that n p-150 (0.3)-45 > 5, and n(1-p) 150(0.7)-105 > 5, so the normal approximation to the binomial is quite valid.) What is the probability that 30 or fewer customers pay their account balances in full before any interest charges are incurred?...
TII t slllaid devilatión of this probability function? 6, 25% of the customers at XYZ Stores use a debit card to pay for their purchases. In a recent market research study, 18 of the Sto...
TII t slllaid devilatión of this probability function? 6, 25% of the customers at XYZ Stores use a debit card to pay for their purchases. In a recent market research study, 18 of the Store's over 20,000 customers on record was randomly selected for two focus groups on new payment technologies. (5 points) a Is the selection of 18 customers a binomial experiment? Please explaun b. What is the probability that 5 of the 18 customers selected use a debit...
Of all the customers at a gas station, 40% pay by credit card, and the rest...
Of all the customers at a gas station, 40% pay by credit card, and the rest use cash. (a) Find the probability that out of 5 random customers, at most 1 uses credit card. 0.375 5 x 0.4 x 0.64 0.69 + 5 x 0.4 x 0.64 0.05184 (b) Knowing that at most 1 out of the 5 customers paid using credit card, what is the conditional probability that all 5 customers used cash payment? Answer: Suppose that the customers...
Customers at a gas station pay with a credit card (A), debit card (8), or cash...
Customers at a gas station pay with a credit card (A), debit card (8), or cash (C). Assume that successive customers make independent choices with P(A) = 0.4, P(B) 0.2, and P(C) = 0.4. (a) Among the next 100 customers, what are the mean and variance of the number who pay with a debit card? customers customers Explain your reasoning. O Because we are interested in whether or not a debit card was used, we can use the binomial distribution....
In a shopping mall an average of 3 out of every 5 customers use visa credit...
In a shopping mall an average of 3 out of every 5 customers use visa credit cards. A sample of 10 customers is selected. Find the probability that exactly 6 customers use visa credit card. Find the probability that less than 9 customers use visa credit card. Now assume that a sample of 50 customers are selected. Find the smallest value of n such that P(X<n) ≥ 0.9, where the random variable X represents the number of customers who uses...
Suppose you analyzed the average monthly credit card bill of Visa credit card customers using two...
Suppose you analyzed the average monthly credit card bill of Visa credit card customers using two randomly selected samples: one with 144 Visa credit card customers (Sample #1) and one with 100 Visa credit card customers (Sample #2). Every credit card customer in Sample #1 had a monthly credit card bill of $1,812. Sample #2, on the other hand, had an average monthly credit card bill of $1,868 with a variance of 1,302,388 ($)^2. If you combined these samples into...
Suppose you analyzed the average monthly credit card bill of Visa credit card customers using two...
Suppose you analyzed the average monthly credit card bill of Visa credit card customers using two randomly selected samples: one with 144 Visa credit card customers (Sample #1) and one with 100 Visa credit card customers (Sample #2). Every credit card customer in Sample #1 had a monthly credit card bill of $1,812. Sample #2, on the other hand, had an average monthly credit card bill of $1,868 with a variance of 1,302,388 ($)^2. If you combined these samples into...
Some customers of a retail chain have a store credit card that earns them bonus gifts...
Some customers of a retail chain have a store credit card that earns them bonus gifts when they make purchases at the chain. Currently, 26 customers are shopping in a store in this chain. Of these, half already have a store credit card. If employees offer store credit cards to 7 of these, what is the probability that all of those chosen already have a card? Complete parts (a) through (e) below. (a) Explain why it would not be appropriate...
A major credit card company reported that historically 50% of their customers applied for the Double...
A major credit card company reported that historically 50% of their customers applied for the Double Miles Card, 30% of customers applied for the Standard Card, and 20% of customers applied for the Triple Miles Card. A random sample of recent applications was made. Out of this random sample of customers, 55 had selected Double Miles, 30 had selected Standard, and 35 had selected Triple Miles. Use JMP to test the following hypothesis. Ho: The proportions of each type of...
According to a survey, 23.8 % of credit-card-holding families in a certain area hardly ever pay off the balance. Suppose a random sample of 29 credit-card-holding familles is taken. Find the probability that at least 4 families hardly ever pay the balance The probability that at least 4 families hardly ever pay off the balance is. (Round to four decimal places as needed.)
According to a survey, 23.8 % of credit-card-holding families in a certain area hardly ever pay off...
5.11. It is known that 30% of all customers of a major credit card pay their bills in full before any interest charges are incurred. Suppose a simple random sample of 150 credit card holders is selected. (Note that n p-150 (0.3)-45 > 5, and n(1-p) 150(0.7)-105 > 5, so the normal approximation to the binomial is quite valid.) What is the probability that 30 or fewer customers pay their account balances in full before any interest charges are incurred?...
TII t slllaid devilatión of this probability function? 6, 25% of the customers at XYZ Stores use a debit card to pay for their purchases. In a recent market research study, 18 of the Store's over 20,000 customers on record was randomly selected for two focus groups on new payment technologies. (5 points) a Is the selection of 18 customers a binomial experiment? Please explaun b. What is the probability that 5 of the 18 customers selected use a debit...
Of all the customers at a gas station, 40% pay by credit card, and the rest use cash. (a) Find the probability that out of 5 random customers, at most 1 uses credit card. 0.375 5 x 0.4 x 0.64 0.69 + 5 x 0.4 x 0.64 0.05184 (b) Knowing that at most 1 out of the 5 customers paid using credit card, what is the conditional probability that all 5 customers used cash payment? Answer: Suppose that the customers...
Customers at a gas station pay with a credit card (A), debit card (8), or cash (C). Assume that successive customers make independent choices with P(A) = 0.4, P(B) 0.2, and P(C) = 0.4. (a) Among the next 100 customers, what are the mean and variance of the number who pay with a debit card? customers customers Explain your reasoning. O Because we are interested in whether or not a debit card was used, we can use the binomial distribution....
Suppose you analyzed the average monthly credit card bill of Visa credit card customers using two randomly selected samples: one with 144 Visa credit card customers (Sample #1) and one with 100 Visa credit card customers (Sample #2). Every credit card customer in Sample #1 had a monthly credit card bill of $1,812. Sample #2, on the other hand, had an average monthly credit card bill of $1,868 with a variance of 1,302,388 ($)^2. If you combined these samples into...
Suppose you analyzed the average monthly credit card bill of Visa credit card customers using two randomly selected samples: one with 144 Visa credit card customers (Sample #1) and one with 100 Visa credit card customers (Sample #2). Every credit card customer in Sample #1 had a monthly credit card bill of $1,812. Sample #2, on the other hand, had an average monthly credit card bill of $1,868 with a variance of 1,302,388 ($)^2. If you combined these samples into...
Some customers of a retail chain have a store credit card that earns them bonus gifts when they make purchases at the chain. Currently, 26 customers are shopping in a store in this chain. Of these, half already have a store credit card. If employees offer store credit cards to 7 of these, what is the probability that all of those chosen already have a card? Complete parts (a) through (e) below. (a) Explain why it would not be appropriate...
A major credit card company reported that historically 50% of their customers applied for the Double Miles Card, 30% of customers applied for the Standard Card, and 20% of customers applied for the Triple Miles Card. A random sample of recent applications was made. Out of this random sample of customers, 55 had selected Double Miles, 30 had selected Standard, and 35 had selected Triple Miles. Use JMP to test the following hypothesis. Ho: The proportions of each type of...
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