Standard deviation and coefficient of variation

Reference no: EM13654300

1. The agriculture investment company wants to estimate the mean retail value of lemons. A random sample of 200 stores indicates a mean value of 0.3 AZN with a standard deviation of 0.05 AZN. Assuming a normal distribution, construct a 99% confidence interval estimate for the mean value of lemons on sale

2. The waiting time data (in minutes) in a bank, collected from a sample of 6 customers during the noon-fpm interval is listed below.
5.05 4.80 8.01 8.35 5.70 4.08
Compute the following:

a) The mean, median, mode

b) Range, IQR, variance, standard deviation and coefficient of variation

c) Z scores

3. A sample of 500 purchasing managers was selected to determine information concerning buying behavior. Among the questions asked was "Do you enjoy your role in the organization?" Of 240 males, 136 answered yes. Of 260 females, 224 answered yes. Construct a contingency table to evaluate the probabilities. What is the probability that a respondent chosen at random

a) Enjoys his or her role in the organization?
b) Is a female and enjoys her role in the organization?
c) Is a female or enjoys her role in the organization?
d) Is a male or female?

4. The probability of birth for a girl is 51%. If a family has four children what is the probability that

a) All four are girls?
b) None of them is a girl?
c) At least two of four are boys?

Reference no: EM13654300

Questions Cloud

Obtain the angles of incidence and refraction : A ray of light strikes the midpoint of one face of an equiangularglass prism, at an angle of incidence of 30 degrees. find the angles of incidence and refraction at each surface

Explain different volumetric flask in presence of hcl : What if sulfanlic acid sodium nitrate and 1-naphthylamine are made soluble in water in three different volumetric flask in presence of HCL then mixed together. A color is originated. what does the color reflects ?is it a dye or something else

An open-topped cylindrical pot has a volume : An open-topped cylindrical pot has a volume of 125cm3. What dimensions will minimize the total amount ofmaterial used in making this pot? Neglect the thickness of thematerial as well as possible wastage.

What is the maximum magnitude of magnetic field in this wave : The maximum magnitude of the electric field in an electromagneticwave is 0.0050 V/m. What is the maximum magnitude of the magnetic field in this wave

Standard deviation and coefficient of variation : What is the probability that a respondent chosen at random - Enjoys his or her role in the organization?

Evaluate what is the period of such a wave : ULF (ultra low frequency) electromagnetic waves, produced in thedepths of outer space, What is the period of such a wave

Compute the moloar mass of the biomolocule : A .350g sample of a large biomolocule was dissolved in 15g of Chloroform and the freezing point depression was determined to be .24 degrees C. Calculate the moloar mass of the biomolocule.

Find what is the maximum efficiency of the engine : If engine works between a hot reservoir at 640 K and acold reservoir at 320K. What is the maximum efficiency of the engine

How much energy is contained in a single pulse : Some solid-state lasers can provide 85 TWof power in 1.0 ns pulses at a wavelengthof 0.24 µm. How much energy is contained in a single pulse

User Account

All Pages