1)The confidence level in a confidence interval for µ is a. the probability that the interval...
1)The confidence level in a confidence interval for µ is
| a. |
the probability that the interval contains µ. |
|
| b. |
the probability that the interval does not contain µ. |
|
| c. |
the probability of type I error for the associated hypothesis testing problem. |
|
| d. |
the probability of type II error for the associated hypothesis testing problem. |
|
| e. |
the approximate proportion of intervals which contains µ |
2)In a hypotheses testing problem, the decision as to whether the null hypothesis should be rejected or not can be made by comparing the level of significance and the observed level of significance. The null hypothesis should be rejected if
| a. |
the level of significance is bigger than the (nonzero) observed level of significance |
|
| b. |
the level of significance is equal to one half of the (nonzero) observed level of significance |
|
| c. |
the level of significance is smaller than the (nonzero) observed level of significance |
|
| d. |
the level of significance is greater than one half of the (nonzero) observed level of significance |
|
| e. |
None of the above |
Homework Answers
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1)The confidence level in a confidence interval for µ is
a.
the probability that the interval...
The confidence level in a confidence interval for µ is: A) the probability that the interval...
The confidence level in a confidence interval for µ is: A) the probability that the interval contains µ B) the probability that the interval does not contain µ C) the probability of Type I error for the associated hypothesis testing problem D) the probability of Type II error for the associated hypothesis testing problem E) the approximate proportion of intervals which contains µ when a large number confidence intervals ins contained by repeating the sampling experiment
Question 1 to 11, True or False? Applied business statistics 1) The width of the confidence...
Question 1 to 11, True or False? Applied business statistics
1) The width of the confidence interval depends only on the desired level of confidence 2) When population standard deviation is unknown, sample standaird deviation is used and the interval estimation is based on values from the t- rather than the z-distribution n 3) The z value for a 98% confidence interval around the point estimate is 2.33 4) In order to construct a 90% confidence interval for the population...
Suppose the null hypothesis is Ho : µ = 500 against Ha : > µ =...
Suppose the null hypothesis is Ho : µ = 500 against Ha : > µ = 500 , and the significance level for this testing is 0.05. The population in question is normally distributed with standard deviation 100. A random sample of size n=25 will be used. If the true alternative mean is 550, then the probability of committing the type II error is ____.
A 90% confidence interval for the difference between the means of two independent populations with unknown...
A 90% confidence interval for the difference between the means of two independent populations with unknown population standard deviations is found to be (-0.2, 5.4). Which of the following statements is/are correct? CHECK ALL THAT APPLY. A. The null hypothesis that the two population means are equal is not rejected at the 10% significance level using a two-sided paired tt-test. B. The null hypothesis that the two population means are equal is rejected at the 10% significance level using a...
Which statement best describes the significance level of a hypothesis test? The probability of obtaining a...
Which statement best describes the significance level of a hypothesis test? The probability of obtaining a sample under the assumption that the null hypothesis is true that is more unusual than the observed sample b. The probability of making a Type 1 error The probability of making a Type Il error. d. The probability of correctly rejecting the null hypothesis.
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Economics- Probability and stats
1. Find the value of the 75th percentile of the following array: 5,10,43,9,8,6,2,5 A) 8 B) 9 C) 9.5 D) 8.5 2. Two independent events, A and B, where the P(B) is 0.44 and the probability that A does not occur or B occurs is 0.74. What is the probability that event A occurs? A) 0.3 B) 0.54 C) 0.46 D) 0.28 3. Which of the following is FALSE? A) B) A sampling distribution is a...
(1 point) A 90% confidence interval for the difference between the means of two independent populations...
(1 point) A 90% confidence interval for the difference between the means of two independent populations with unknown population standard deviations is found to be (-0.2, 5.4). Which of the following statements is/are correct? CHECK ALL THAT APPLY. A. The standard error of the difference between the two observed sample means is 2.6. B. A two-sided two-sample t-test testing for a difference between the two population means is rejected at the 10% significance level. C. A two-sided two-sample t-test testing...
11. If the null hypothesis is rejected at a 05 significance level, it (a) must also...
11. If the null hypothesis is rejected at a 05 significance level, it (a) must also be rejected at a.10 significance level. (b) might also be rejected at a .10 significance level. (c) must not be rejected at a.10 significance level. (d) none of the above lfte null hypothesis İs not rejected at a .05 significance level, it: (a) will also not be rejected at a.01 significance level. (b) might be rejected at a .01 significance level. (e) will be...
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10) (a) In a hypothesis testing procedure explain the difference between a type 1 and type...
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Question 1 to 11, True or False? Applied business statistics
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Which statement best describes the significance level of a hypothesis test? The probability of obtaining a sample under the assumption that the null hypothesis is true that is more unusual than the observed sample b. The probability of making a Type 1 error The probability of making a Type Il error. d. The probability of correctly rejecting the null hypothesis.
Economics- Probability and stats
1. Find the value of the 75th percentile of the following array: 5,10,43,9,8,6,2,5 A) 8 B) 9 C) 9.5 D) 8.5 2. Two independent events, A and B, where the P(B) is 0.44 and the probability that A does not occur or B occurs is 0.74. What is the probability that event A occurs? A) 0.3 B) 0.54 C) 0.46 D) 0.28 3. Which of the following is FALSE? A) B) A sampling distribution is a...
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