Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use...

Question

Question

Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use...

Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use an express checkout. Consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

(a) What is p(2), that is, P(x = 2)? (Round the answer to five decimal places.)

(b) What is P(x ≤ 1)? (Round the answer to five decimal places.) P(x ≤ 1) =

(c) What is P(2 ≤ x)? (Round the answer to five decimal places. Hint: Make use of your computation in Part (b).) P(2 ≤ x) =

(d) What is P(x ≠ 2)? (Round the answer to five decimal places.) P(x ≠ 2) =

math Statistics-And-Probability

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

Go balbiliH of custiomer f use an oxfress cherxout La) nomi UitlOrn 0.2 5 1-0 25 x = 2 =0 . 26 361 0 25 025 1-0 25 0.93 304 6 + 0.39 = 0.63281 (-Ans) 2. , 89648 x=2) t- 0.2 6 367 = O736 33 ns)

Add a comment

Answer 2

Similar Homework Help Questions

5. Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail...

5. Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail the inspection. In a random sample of 15 selected cars: (round 3 decimal places) a) Find the probability that at most five of the cars fail the inspection. b) Find the probability that at least three of the cars fail the inspection. c) Find the probability that all 15 of the cars fail the inspection. 6. Twenty-five percent of the customers of a grocery...
Formulas 1.) (5 pt.) At a grocery store customers in the checkout line may use a...

Formulas 1.) (5 pt.) At a grocery store customers in the checkout line may use a credit card. The probability they will use a credit card is 80%. There are four customers in a line. Let X be the random variable (R.V.) denoting the number of customers out of the four who use a credit card. Determine the probability mass function (pmf) for X and use it to construct both graphically and numerically the cumulative distribution function (CDF) for X....
Consider the case of a grocery store where the interarrival time between two customers consecutively entering...

Consider the case of a grocery store where the interarrival time between two customers consecutively entering the store is known to be exponentially distributed. Previously collected data shows that 1800 customers were recorded to have entered the store in 300 hours. Answer the following: (a) What is the probability density function for the inter-arrival time (in minutes) between two consecutively arriving customers? (15) (b) What is the probability that the next customer will arrive AFTER five minutes? (10) (c) What...

QUESTION 13 5 points In a sample of 90 grocery store customers. it is found that...

QUESTION 13 5 points In a sample of 90 grocery store customers. it is found that 63% of them were buying 15 items or fewer. Determine the upper bound of the 95% confidence interval for the proportion of customers that buy 15 items or fewer? (please express your answer AS A DECIMAL using 4 decimal places) QUESTION 14 5 points Historically, the proportion of students entering a university who finished in 4 years or less was 60%. To test whether...
Pete's Market is a small local grocery store with only one checkout counter. Assume that shoppers...

Pete's Market is a small local grocery store with only one checkout counter. Assume that shoppers arrive at the checkout lane according to a Poisson probability distribution, with an arrival rate of 9 customers per hour. The checkout service times follow an exponential probability distribution, with a service rate of 15 customers per hour. The manager’s service goal is to limit the waiting time prior to beginning the checkout process to no more than five minutes. Also the manager of...
Pete's Market is a small local grocery store with only one checkout counter. Assume that shoppers...

Pete's Market is a small local grocery store with only one checkout counter. Assume that shoppers arrive at the checkout lane according to a Poisson probability distribution, with an arrival rate of 16 customers per hour. The checkout service times follow an exponential probability distribution, with a service rate of 20 customers per hour. The manager’s service goal is to limit the waiting time prior to beginning the checkout process to no more than five minutes. Also the manager of...

Suppose Clay, a grocery store owner, is monitoring the rate at which customers enter his store....

Suppose Clay, a grocery store owner, is monitoring the rate at which customers enter his store. After watching customers enter for several weeks, he determines that the amount of time in between customer arrivals follows an exponential distribution with mean 25 s. What is the 80 th percentile for the amount of time between customers entering Clay's store? Round your answer to the nearest two decimal places. 80th percentile= s
Annie and Alvie have agreed to meet between 5:00 P.M. and 6:00 P.M. for dinner at...

Annie and Alvie have agreed to meet between 5:00 P.M. and 6:00 P.M. for dinner at a local health-food restaurant. Let X- Annie's arrival time and Y-Alvie's arrival time. Suppose X and Y are independent with each uniformly distributed on the interval [5, 6] (a) what is the joint pdf of X and Y? f(x,y) 0 otherwise (x,0 otherwise (a, y) otherwise (r.y)0 otherwise (b) What is the probability that they both arrive between 5:21 and 5:48? (Give answer accurate...
Twenty-five percent of the nursing students at a particular college are male. Of the male nursing...

Twenty-five percent of the nursing students at a particular college are male. Of the male nursing students, 50% are taking a biology course this semester. Of the female nursing students, 30% are taking a biology course this semester. A nursing student is randomly selected, what is the probability that this student is a female taking a biology course this semester. Round your answer to three decimal places. Draw a tree to help find the probability.

5. People end up tossing 12% of what they buy at the grocery store (Reader's Digest,...

5. People end up tossing 12% of what they buy at the grocery store (Reader's Digest, March 2009). Assume this is the true population proportion and that you plan to take a sample survey of {x} grocery shoppers to further investigate their behavior. Determine the expected value of the sampling distribution, i.e. E(p-bar). Express your answer as a decimal rounded to two decimal places.

Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use...

Homework Answers

Add Answer to:
Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use...

Post as a guest

Earn Coins

5. Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail...

Formulas 1.) (5 pt.) At a grocery store customers in the checkout line may use a...

Consider the case of a grocery store where the interarrival time between two customers consecutively entering...

QUESTION 13 5 points In a sample of 90 grocery store customers. it is found that...

Pete's Market is a small local grocery store with only one checkout counter. Assume that shoppers...

Pete's Market is a small local grocery store with only one checkout counter. Assume that shoppers...

Suppose Clay, a grocery store owner, is monitoring the rate at which customers enter his store....

Annie and Alvie have agreed to meet between 5:00 P.M. and 6:00 P.M. for dinner at...

Twenty-five percent of the nursing students at a particular college are male. Of the male nursing...

5. People end up tossing 12% of what they buy at the grocery store (Reader's Digest,...

Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use...

Homework Answers

Add Answer to: Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use...

Post as a guest

Earn Coins

Add Answer to:
Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use...