Purchase Solution

Hypothesis Testing of Mean & Variance

Not what you're looking for?

Ask Custom Question

1. The following data are from an independent-measures experiment comparing two treatment conditions. Do these data indicate a significant difference between the treatments

Treatment one:
13
9
7
11

Treatment two:
9
5
5
9

2. A sample of freshmen takes a reading comprehension test and their scores are summarized below. If the mean for the general population on this test is m=12, can you conclude that this sample is significantly different from the population. Test with a=.05
sample scores: 16, 8, 8, 6, 9, 11, 13, 9, 10

3. The following data are from two separate samples. Does it appear that these two samples came from the sample or from two different populations?

a. Use an F-max test to determine whether there is evidence for a significant difference between the two population variances. Use the .05 level of significance 

b. Use an independent-measures t test to determine whether there is evidence for a significant difference between the two population means. Again, use a=.05

Sample one:
n=10
M=32
SS=890

Sample two:
n=10
M=18
SS=550

4. A research study reports t(14)=2.17. 

a. How many individuals participated in the study? (how big was the sample?)

b. Is this t statistic sufficient to reject the null hypothesis using a two-tailed test with a = .05?

5. The following data were obtained from an independent measures study. Determine if there us a significant difference between the treatments. Use a =.05

Treatment one:
5
1
2
3
4

Treatment two:
6
10
14
12
18

Please show all work. Thank you

Purchase this Solution
Solution Summary

The solution provides step by step method for the calculation of testing of hypothesis. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

Purchase this Solution
Free BrainMass Quizzes
Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

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

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

  • Testing of mean and variance

    86855 Testing of mean and variance Testing of mean and variance. See attached file for full problem description. Please see the attached file. Answer 4 Here we test the null hypothesis H0: i.e the average daily yield =880.

  • ANOVA: The Meaning of F = 1 and Two Sample T-Tests

    The F distribution is the distribution of the ratio of two estimates of variance. It is used to compute probability values in the analysis of variance. What are the differences between a two sample t-test and ANOVA hypothesis testing?

  • Testing of variance with chi-square

    This solution mainly discussed the testing of variance using chi-square test. A logical answer is given for every situation for better clarity on using the interpretation of testing of hypothesis for variance.

  • Statistics testing for mean acceleration

    376067 Statistics testing for mean acceleration Significance Level: Hypothesis testing is the basis of inferential statistics. Statisticians are always coming up with new tests and testing new characteristics of population parameters.

  • Test of Hypothesis -Testing Gas Mileage Claims

    Note: Since significance level for testing the hypothesis is not mentioned we can assume it to be 0.05 Data Hypothesized mean= 28 mpg Standard deviation= 4.2 mpg Sample mean= 26.7 mpg Sample size=

  • Performing a 5-step hypothesis testing

    The result for University X was a mean of 5 hours and an estimated population variance of 2 hours; for University Y, M = 4, S2 = 1.5; and for University Z, M = 6, S2 = 2.5.

  • Conducting a 5-step Hypothesis Testing

    Using the 5 steps of hypothesis testing listed below, what should the experimenter conclude?

  • Hypothesis Testing & Confidence Interval

    of testing of hypothesis and confidence interval.

  • Hypothesis test and ANOVA table interpretation

    When the sample is done the sample mean is computed to be 7.2 and the sample standard deviation is 1.5. Test the hypothesis using an alpha of 5%. Use formal hypothesis testing and compute the p-value. 2.

  • Theoretical Issues About Testing of Population Mean

    272868 Theoretical Issues About Testing of Population Mean How do hypothesis-testing procedures differ for the population mean when the population standard deviation is known or unknown?

View More Related Solutions