The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of200 minutes, with the results shown in the table below. Complete (a) through (c) to the right.FrequencyArrivals042847403121952a. Compute the expected number of arrivals per minute.μ = 2.88(Type an integer or decimal rounded to three decimal places as needed.)b. Compute the standard deviation.=9(Type an integer or decimal rounded to three decimal places as needed.)

XFrequency017128247340431521697582

Answered: he number of arrivals per minute at a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The worldwide market share for a web browser was 20.5% in a recent month. Suppose that a sample of 200 random students at a certain university finds that 50 use the browser. Calculate the test statistic. ZSTAT=______ (Type an integer or a decimal. Round to two decimal places as needed.)
If n=7 (days in a week) and p=0.45 (the probability that the food truck operates on a single day), determine the theoretical mean and standard deviation for the number of days open in a week. Use Excel and the information given in part above (n=7, p=.45) to determine the probability that the number of days open in a week is 5 days.
The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in their name, from a sample of 342 people. x n 0 97 1 96 2 98 3 51 (a) Find the mean number of cars owned for this sample. Give your answer to at least 2 decimal places. (b) Find the standard deviation of cars owned for this sample. Give your answer to at least 2 decimal places.
A city's mean minimum daily temperature in February is 25°F.Suppose the standard deviation of the minimum temperature in February is 3°F and that the distribution of minimum temperatures in February is approximately Normal. What percentage of days in February has minimum temperatures below freezing (32°F)? Round to the nearest integer as needed.
The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in their name, from a sample of 311 people. x n 0 93 1 91 2 60 3 67 (a) Find the mean number of cars owned for this sample. Give your answer to at least 2 decimal places. (b) Find the standard deviation of cars owned for this sample. Give your answer to at least 2 decimal places.
Assume that the readings at freezing on a bundle of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find Pg9, the 69-percentile. This is the temperature reading separating the bottom 69% from the top 31%. P69 = °C
Find the standard deviation of the following numbers (Round your answer to 4 decimal places.): 1, 4, 4, 7, 7, 7, 11, 11, 14, 16, 16
The following table shows the number of people that are either 18, 19, 20 or 21 years old, from a sample of 258 people. a) Complete the table. Age Number of people 18 54 19 69 20 70 21 (b Find the mean for this sample. Give your answer to at least 2 decimal places. (c Find the standard deviation for this sample. Give your answer to at least 2 decimal places.
benk is 9.2 minutes with a standard deviation of The average waiting time for a drive in 2.6 minutes. Assume that the times A. Determine the probability, to 3 decimal places, t ustomer will have to wait less than 6 minutes. B. 20% of all customers will have to wait more than minutes. Round to 1 decimal place.
The trade volume of a stock is the number of shares traded on a given day. The following data, in millions represent the volume of a certain stock traded for a random sample of 40 trading days in 2007. use the data to compute a point estimate for the population mean number of shares traded per day in 2007. (Round to three decimal places as needed.)
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P87, the 87-percentile. This is the temperature reading separating the bottom 87% from the top 13%.P87 = °C

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