The number of arrivals per minute at a bank located in the central business district of...

Question

Question

The number of arrivals per minute at a bank located in the central business district of...

The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes with the results shown in the table below. Complete parts a and b to the right.

Arrivals	Frequency
0	2222
1	3737
2	4242
3	3636
4	2828
5	2020
6	1010
7	44
8	11

a. Compute the mean number of arrivals per minute.

μ=

(Type an integer or a decimal. Do not round.)

b. Compute the standard deviation of arrivals per minute.

σ=

(Type an integer or a decimal. Do not round.)

math Statistics-And-Probability

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

a)

mean number of arrivals per minute μ= 2.685

b)

standard deviation of arrivals per minute σ= 1.8099

Add a comment

Answer 2

Similar Homework Help Questions

The number of arrivals per minute at a bank located in the central business district a....

The number of arrivals per minute at a bank located in the central business district a. Compute the mean number of arrivals per minute of a large city was recorded over a period of 200 minutes with the results shown in the table below. Complete parts a and b to the right (Type an integer or a decimal) Frequency 24 52 41 b. Compute the standard deviation for the number of arrivals per minute (Round to three decimal places as...
The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes

The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the results shown in the table below. Complete (a) through (c) to the right. a. Compute the expected number of arrivals per minute. b. Compute the standard deviation. c. What is the probability that there will be fewer than 2 arrivals in a given minute?
a. Poisson distribution was used to model the number of arrivals per minute at a bank...

a. Poisson distribution was used to model the number of arrivals per minute at a bank located in the central business district of a city. Suppose that the actual arrivals per minute were observed in 200 01e. minute periods over the course of a week are given below. Determine whether the number of arrivals per minute follows a Poisson distribution Frequency 14 31 47 41 29 21 10 Arrivals 2 6 8 Total 1 -8 CI- b. In the z...

A bank with a branch located in a commercial district of a city has the business...

A bank with a branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon-to-1 P.M. lunch period. Management decides to fist study the waiting time in the current process. The waiting time is defined as the number of minutes that elapses from when the customer enters the line until he or she reaches the teller window. Data are collected from a random sample of 15 customers...
Each of 161 newly manufactured items is examined and the number of scratches per item is...

Each of 161 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of scratches per item Observed frequency 12 44 35 33 12 12 8 5 0 123 4 5 6 7 Let X the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter μ (a) Find an unbiased estimator of μ...
A bank with a branch located in a commercial district of a city has the business...

A bank with a branch located in a commercial district of a city has the business objective of improving the process for serving customers during the noon-to-1 PM lunch period. To do so, the waiting time (defined as the number of minutes that elapses from when the customer enters the line until he or she reaches the teller window) needs to be shortened to increase customer satisfaction. A random sample of 15 customers is selected and the waiting times were...

Question Help A bank with branches located in a commercial district of a city and in...

Question Help A bank with branches located in a commercial district of a city and in a residential area has the business objective of developing an improved process for serving customers during the noon-to-1 PM lunch period Management decides to first study the waiting time in the current process. The waiting time is defined as the number of minutes that elapses from when the customer enters the line until he or she reaches the teller window. Data are collected from...
Use the accompanying data set on the pulse rates (in beats per minute) of males to...

Use the accompanying data set on the pulse rates (in beats per minute) of males to complete parts (a) and (b) below. Click the icon to view the pulse rates of males. a. Find the mean and standard deviation, and verify that the pulse rates have a distribution that is roughly normal. The mean of the pulse rates is beats per minute. (Round to one decimal place as needed.) 78 85 95 76 50 59 52 58 64 64 51...
3. Waiting times (in minutes) of customers in a bank where all customers enter a single...

3. Waiting times (in minutes) of customers in a bank where all customers enter a single waiting line and a bank where customers wait in individual lines at three different teller windows are listed below. Find the mean and median for each of the two samples, then compare the two sets of results. Single Line 6.36.3 6.66.6 6.76.7 6.86.8 6.96.9 7.17.1 7.67.6 7.87.8 7.87.8 7.87.8 Individual Lines 4.14.1 5.55.5 6.06.0 6.16.1 6.26.2 7.87.8 7.87.8 8.78.7 9.29.2 10.010.0 The mean waiting...

The number of arrivals per minute at a bank located in the central business district of...

Homework Answers

Add Answer to:
The number of arrivals per minute at a bank located in the central business district of...

Post as a guest

Earn Coins

The number of arrivals per minute at a bank located in the central business district a....