Purchase Solution

Sample Population Confidence Intervals Case Study

Not what you're looking for?

Ask Custom Question

1. Collect data. Develop a 90% confidence interval and a 95% confidence interval for the population mean. Did you use a z statistic or t statistic? Why? Compare the size and meaning of the two confidence intervals.

2. Take a random sample and test a hypothesis about a population mean. Explain what assumptions you made.

Purchase this Solution
Solution Summary

A detailed hypothesis testing with sample data is determined.

Solution Preview

Solution:
We use the job satisfaction on gender, age, dept, position, overall, intrinsic, extrinsic and Benefits
Area of Interest and why the data are of interest to you (Brief explanation; Ex: What are your expectations, what questions/issues would you like to address?)
I am interest to analysis the intrinsic calculated test statistic value is less than the critical value the null hypothesis is not rejected. That is, there is no enough evidence to reject the null hypothesis at 0.05 level of significance. Hence we conclude that H0:µ=5
Population and Variable (Define carefully)
Total population is 29 and 4 variable we chose intrinsic
Data Source:
I am assuming the below data
Data:
Consider the following ...

Purchase this Solution
Free BrainMass Quizzes
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.

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.

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

  • Confidence Intervals, Differences Between T And Z Distribution

    Confidence intervals represent ESTIMATION, about "the true mean of a population based on a random sample."

  • Confidence intervals for determining clinical significance

    A confidence interval is a range of population values that is compatible with the sample data however statistical significance utilizes data from a given hypothesized population.

  • Statistics Questions

    Confidence Intervals 1. For a sample mean of 4 and a population standard deviation of 0.3 with a sample size of 100, find the 95% CI for the population mean.

  • Confidence Intervals on Faith Healing

    247399 Confidence Intervals on Faith Healing This question is asking for speculation about the possible results of a study if we change the size of the population.

  • Understanding confidence intervals

    219811 Understanding confidence intervals What do we mean by confidence intervals - provide an example that illustrates your answer. Suppose we were to apply 95% and 99% confidence to your study results.. how might your result differ and why?

  • Sampling populations give 95% confidence intervals

    414165 Sampling populations give 95% confidence intervals Please give answers with steps. 1) The accounting firm of Ahmadi & Associates was commissioned to audit a population of 500 accounts.

  • Determining Confidence Intervals

    Half Width 1.011004030 Confidence Interval Interval Lower Limit 20.59 Interval Upper Limit 22.61 The expert determines the confidence intervals for a study of working adults.

  • Finding Sample Amount for Population Mean

    The sample mean b. The 80% confidence intervals for the population mean= c. The 50% confidence intervals for the population mean= d. The 98% confidence intervals for the population mean= e.

  • Estimations, Confidence intervals, Sample Size

    321395 Estimations, Confidence intervals, Sample Size Why are estimations and confidence intervals important? Do confidence intervals and estimation play a role in the selection of sample size? Please explain your answer.

  • Finding Correct Z and T Scores for Confidence Intervals

    We will also study how confidence intervals will let one determine how large of a sample is required in order to get within a desired error range. Thus, confidence intervals offer important real-world applications.

View More Related Solutions