Reference no: EM13113381
Use Appendix F below to locate the value of t under the following conditions.
a. The sample size is 15 and the level of confidence is 95 percent.
b. The sample size is 24 and the level of confidence is 98 percent.
c. The sample size is 12 and the level of confidence is 90 percent.
Confidence Intervals 80% 90% 95% 98% 99%
Level of Significance for One-Tailed Test df 0.100 0.050 0.025 0.010 0.005
Level of Significance for Two-Tailed Test 0.20 0.10 0.05 0.02 0.01
1 3.078 6.314 12.706 31.821 63.657
2 1.886 2.920 4.303 6.965 9.925
3 1.638 2.353 3.182 4.541 5.841
4 1.533 2.132 2.776 3.747 4.604
5 1.476 2.015 2.571 3.365 4.032
6 1.440 1.943 2.447 3.143 3.707
7 1.415 1.895 2.365 2.998 3.499
8 1.397 1.860 2.306 2.896 3.355
9 1.383 1.833 2.262 2.821 3.250
10 1.372 1.812 2.228 2.764 3.169
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.
|
Hypothesis testing-chicken delight
: Chicken Delight claims that 90% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised time.
|