Proportionate stratified random sampling

Assignment Help Basic Statistics
Reference no: EM13102758

Suppose the age distribution in Sydney is as follows:

Under 18 22%
18 -25 18%
26-50 36%
51-65 10%
over 65 14%
Total 100%

A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?

Reference no: EM13102758

Questions Cloud

Explain different periods in physical development process : Select two age groups from different periods in physical development process. Write some thought to age groups you select. Distinguish what you would expect to see in classroom from each age group in terms of expected
Type of sampling method : USA Today conducted a survey asking readers, "What is the most hilarious thing that has ever happened to you en route to or during a business trip?" a. What kind of sampling method is this?
Express the position of the object in one-dimensional motion : An object moving with uniform acceleration has a velocity of 10.0 cm/s in the positive x-direction when its x-coordinate is 3.09 cm. If its x-coordinate 3.05 s later is ?5.00 cm, what is its acceleration?
Binomial probability-testing a claim : According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
Proportionate stratified random sampling : A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
Find the magnitude of the deceleration : To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 50.6 m when its initial speed is 79..
Binomial tree for currency put option : An American put option to sell a swiss franc for dollars has a strike price of $0.80 and a time to maturity of one year. The volatility of the swiss franc is 10%
Develop the global void function to create two objects : Write a class implementation for the class_my class which comprises the data member ID of type integer and data member MSG of type string.
Normal distribution and binomial experiment : Provide an example of an application of the normal distribution. Explain why standard normal distribution can be used to find the probabilities for all normal distributions?

Reviews

Write a Review

Basic Statistics Questions & Answers

  How large a sample is necessary

A researcher wishes to estimate within $300 the true average amount of money a country spends on road repairs each year. If she wants to be 90% confident, how large a sample is necessary? The standard deviation is known to be $900.

  Preparting chart using z-value

In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.

  Unconditional probability

Compare the unconditional probability of having the disease to the conditional probability of having the disease given the test says you have the disease.

  Probability depend on poisson distribution

What is the probability there will be between 10 and 14 calls inclusive arriving at the company in the next 15 minutes?

  Sample mean in the middle of the distribution

Compute the z-score for M = 89 for a sample of n = 25 scores. Is this sample mean in the middle 95% of the distribution?

  To perform two sample z test

At the .05 level of significance, can we conclude the Middletown students stayed in their districts less time than the Brockton students? Use the five-step hypothesis testing procedure.

  Correct and wrong identification

The trail was repeated 54 times with 22 correct identifications and 32 wrong identification.

  Find the sum of the least squares slope

Using t test for significance of slope to determine whether the independent variable is a significant predictor  of the dependent variable - Find the sum of the least squares slope and intercept parameter?

  Construct a frequency distribution for class

Construct a frequency distribution that has 5 classes, and draw:

  Expected national cancer-incidence rates

Twelve cases of leukemia are reported in people living in a particular census tract over a 5-year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer-incidence rates?

  Designing the pie chart and bar graph for data

Data is distribution of the most popular colors for 2005 model luxury cars made in North America. Design the pie chart and bar graph for data.

  Normally distributed population

Suppose that an IQ test was given to a large group of persons, the scores are assumed to be from a normally distributed population, that mean = 100 and s (standard deviation) = 15.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd