Values of test statistics

Assignment Help Basic Statistics
Reference no: EM13113382

The following sample data were obtained from three populations where the variances were not equal, and you wish to compare the populations.

Sample 1 Sample 2 Sample 3

21 15 38

29 17 40

35 22 44

45 27 51

56 31 53

71

a. State the null hypothesis.

b. Using the .01 level of risk, state the decision rule.

c. Compute the value of the test statistic.

d. What is your decision on the null hypothesis?

Reference no: EM13113382

Questions Cloud

Question about hypotheses testing : A normal tomato will gain an average of 2 ounces per week during the growing season. A sample of 100 tomatoes is given a special hormone to increase their growth.
Stating decision rule : A sample of 120 observations revealed that p = .30. At the .05 significance level, can the null hypothesis be rejected?
Compute confidence interval for the true mean weight : A standard deviation of 1.9 pounds. What is the 95 percent confidence interval for the true mean weight, u, of all packages received by the parcel service?
Hypotheses testing of us government : The U.S. government recently reported that the proportion of people feeling negative about the economy was only 30%. However, a recent poll by CNN/Gallup found that in a sample of 1000 people 450 of them felt negative about the economy.
Values of test statistics : The following sample data were obtained from three populations where the variances were not equal, and you wish to compare the populations.
Locate the value of t under the conditions : Use Appendix F below to locate the value of t under the following conditions. The sample size is 15 and the level of confidence is 95 percent.
Compute percentage of car models that get more mpg : What proportion of 330 cci cars fall between 26 to 30 miles per gallon range? Compute the percentage of each of the car models that get 30 or more mpg.
Null hypothesis-alternate hypothesis and critical value : A sample of 100 orders revealed that 82 were delivered within the promised time. At the 0.10 significance level, can we conclude that less than 90% of the orders are delivered in less than 10 minutes?
Explain differences in three categories using significance : The data (in milliamps) are shown below. Using the .05 level of significance, are there any differences in the three categories.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Probability that the sprinkler system will come on

In case of fire, the probability that D1 operates correctly is 0.95 and the probabilty that D2 operates correctly is 0.92. Find the probability that the sprinkler system will come on.

  Percentile of the thickness distribution

The shell thicknesses of the eggs produced by a large flock of hens follow approximately a normal distribution with mean equal to 0.38 mm and standard deviation equal to 0.03 mm. Find the 95th percentile of the thickness distribution.

  Sample required for the poll

Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..

  Interpretation of regression coefficients-r square

What is the interpretation of the coefficients that emerge from the regression equation. Can you predict a change in the y variable given knowledge of the x variable?

  Probability that al five cards are hearts

A deck of cards contains 52 cards, 13 in each of four suits (hearts, diamonds, clubs and spades). Suppose you have been dealt five cards without replacement from a randomly shuffled deck of cards. Find the probability that al five cards are hearts..

  Random sample of students

If the mean IQ of all Omega University students was equal to 115, and a small random sample of students was selected from the population whose mean IQ was 120, then this difference of 5 points would equal the:

  Information regarding poisson probability

What type of probability distribution is appropriate for this problem? Determine the probability of getting no calls between eight and nine in the morning. Calculate the probability of getting exactly five calls between eight and nine in the morning

  Probability that two of the babies selected are boys

53% of all recorded births are boys if 6 babies born in this hospital are selected at random find the probability that two of the babies selected are boys.

  Potato chips from factory following normal distribution

Suppose that weights of bags of potato chips coming from a factory follow a normal distribution with mean 12.8 ounces and standard deviation .6 ounces.

  Statistics-accident rate

In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents

  Chi-square test - job pressure and age

A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.

  Find out the different possibilities for network password

The password of 52 digit sequence is made. It consists of 0 and 1. How various different possibilities exist for networks password.

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