Question

In: Statistics and Probability

A time taken by a consumers, when dealing with the clerks are normally distributed with mean...

A time taken by a consumers, when dealing with the clerks are normally distributed with mean
1.5 minutes and standard deviation 20 seconds. A sample of 38 consumers is chosen at random.
What is the probability that the mean time taken when dealing with the clerks are more than 1.6
minutes?

Solutions

Expert Solution


Related Solutions

Q1) In a test, the time taken to solve the questions is normally distributed with mean...
Q1) In a test, the time taken to solve the questions is normally distributed with mean μ and standard deviation σ. It is found that 4% of the population take less than 5 minutes to get to solve questions, and 70% take less than 25 minutes. i. Find the values of mean and variance of time distribution. ii. Find the Interquartile range of time
The time for a professor to grade an exam is normally distributed with a mean of...
The time for a professor to grade an exam is normally distributed with a mean of 12.6 minutes and a standard deviation of 2.5 minutes. 1. Compute Z-score if it took the professor 15 minutes to grade an exam 2. What is the probability that a randomly selected exam will require between 12 and 15 minutes to grade? 3. What is the probability that a randomly selected exam will require less than 15 minutes to grade?
1. The incubation time for a breed of chicks is normally distributed with a mean of...
1. The incubation time for a breed of chicks is normally distributed with a mean of 28 days and standard deviation of approximately 1 day. Look at the figure below and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all...
1. The incubation time for a breed of chicks is normally distributed with a mean of...
1. The incubation time for a breed of chicks is normally distributed with a mean of 28 days and standard deviation of approximately 1 day. Look at the figure below and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all...
Suppose that the waiting time for a bus is normally distributed with a mean of 5...
Suppose that the waiting time for a bus is normally distributed with a mean of 5 minutes and a standard deviation of 2.5 minutes. (a) Find the probability that the waiting time for the bus is between 3 minutes and 7 minutes. (b) If you randomly choose 4 passengers, find the sampling distribution of their average waiting time. Please indicate shape, mean and standard deviation. (c) For the randomly selected 4 passengers, find the probability that their average waiting time...
The time required to assemble an electronic component is normally distributed with a mean and a...
The time required to assemble an electronic component is normally distributed with a mean and a standard deviation of 17 minutes and 9 minutes, respectively. a. Find the probability that a randomly picked assembly takes between 15 and 22 minutes. b. It is unusual for the assembly time to be above 29 minutes or below 7 minutes. What proportion of assembly times fall in these unusual categories?
The incubation time for a breed of chicks is normally distributed with a mean of 20...
The incubation time for a breed of chicks is normally distributed with a mean of 20 days and standard deviation of approximately 3 days. Look at the figure below and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all eggs...
The incubation time for a breed of chicks is normally distributed with a mean of 24...
The incubation time for a breed of chicks is normally distributed with a mean of 24 days and standard deviation of approximately 2 days. Look at the figure below and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all eggs...
The incubation time for a breed of chicks is normally distributed with a mean of 21...
The incubation time for a breed of chicks is normally distributed with a mean of 21 days and standard deviation of approximately 3 days. Look at the figure below and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all eggs...
The amount of time a shopper spends in the supermarket is normally distributed with a mean...
The amount of time a shopper spends in the supermarket is normally distributed with a mean of 45 minutes with a standard deviation of 12 minutes. If 10 shoppers are selected, how many of them will spend less than 35 minutes? Round your answer to 3 decimal places. Do not include units in your answer. 4 points QUESTION 13 The amount of time a shopper spends in the supermarket is normally distributed with a mean of 45 minutes with a...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT