Purchase Solution

Statistics - Sampling and Sampling Distribution

Not what you're looking for?

Ask Custom Question

1. Suppose you need to sample the concentration of a chemical in a production process that goes on continuously 24 hours per day, 7 days per week. You need to generate a random sample of six observations of the process over a period of one week. Use a computer, a calculator, or a random number table to generate the six observation times (to the nearest minute).

2. When sampling is from a population with standard deviation  = 55, using a sample size n = 150, what is the probability that X will be at least 8 units away from the population mean ?

3. Shimano mountain bikes are displayed in chic clothing boutiques in Milan, Italy, and the average price for the bike in the city is $700. Suppose that the standard deviation of bike prices is $100. If a random sample of 60 boutiques is selected, what is the probability that the average price for a Shimano mountain bike in this sample will be between $680 and $720.

Attachments
Purchase this Solution
Solution Summary

A Complete, Neat and Step-by-step Solution is provided in the attached Excel file.

Purchase this Solution
Free BrainMass Quizzes
Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

View More Free Quizzes
Related BrainMass Solutions

  • Estimating the Number of Undergraduate Sociology Students

    When using inferential statistics, you need to understand the idea of the sampling distribution. The sampling distribution is the central concept, and is a theoretical distribution of all possible sample outcomes.

  • Sampling distributions

    Standard Deviation Statistics Suppose the annual consumption of chicken mean is 20.84 pounds per person and that the standard deviation for the consumption of chicken per person is 9.193 pounds.

  • Sampling and Subjective probability

    Sampling/Population distribution/Subjective probability concepts 1) Why do you use sampling? Can you provide an example? Statistics use the word sample to describe a portion chosen from the population. Sampling is used to save time and cost.

  • Statistic Terms & Central Limit Theorem

    Parameters are rarely known and are usually estimated by statistics computed in samples.

  • Sampling distribution for service providers

    151665 Sampling distribution for service providers A service to provide phone support to statistics students was in service for 3 days. On those days, the services received 3,7,and 5 calls.

  • Statistics of Doctor Appointment with a New Patient

    The mean of the sampling distribution is 30. The standard deviation of the sampling distribution is 12/sqrt(36)=12/6=2. Based on the central limit theorem, the sampling distribution is normal.

  • Statistics

    116944 Statistics Definitions What is the sampling distribution of sample means? What is the mean of the sampling distribution of sample means? What is its standard deviation? How is that standard deviation affected by the sample size?

  • Z-score & Normal Probability

    There is need to specify how a sampling distribution is different from a population distribution and the relationship between standard deviation and sampling error. Use t-scores to describe the location of scores with a t-distribution.

  • Sampling distribution of sample mean

    If 40 snowfall amounts are randomly selected, find for the sampling distribution of sample means with samples of size 40. Answer The sampling distribution of sample mean is normal with mean = population and standard deviation = .

  • Explain the concept of central limit theory with examples

    The relationship between the shape of the population distribution and the shape of the sampling distribution of the mean is called the central limit theorem.

View More Related Solutions