Question

1. The power of a statistical hypothesis test should be Group of answer choices small large...

1.

The power of a statistical hypothesis test should be

Group of answer choices

small

large

equal to 1 - α

2.

If the Type II error rate of a statistical hypothesis test is 0.15,

Group of answer choices

the Type I error rate is 0.15

the Type I error rate is 0.85

the power is 0.15

the power is 0.85

3.

If sampled observations are from a normal distribution, the QQplot should look

Group of answer choices

bell-shaped

u-shaped

linear

4.

An important assumption for validity of a t-test is that

Group of answer choices

the population should have a normal distribution

the sample should have a normal distribution

the sample mean should have a normal distribution

Homework Answers

Answer #1

1. The power of a statistical hypothesis test should be large.

Since the power lies between 0 and 1 and if it is close to 1 the test is very good at detecting a false null hypothesis.

2. If the Type II error rate of a statistical hypothesis test is 0.15, the power is 0.85

reason: power = 1- type 2 error

3. If sampled observations are from a normal distribution, the QQplot should look linear

4.

An important assumption for validity of a t-test is that the population should have a normal distribution

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
You complete a hypothesis test using a = .05, and based on the evidence from the...
You complete a hypothesis test using a = .05, and based on the evidence from the sample, your decision is to reject the null hypothesis. If the treatment actually has no effect, which of the following is true?​ Group of answer choices ​You have made a Type I error. ​You have made a Type II error. ​You might have made a Type I error, but the probability is only 5% at most. ​You have made the correct decision. ​For a...
The hypothesis test: Group of answer choices has no tails is two-tailed is left-tailed is right-tailed...
The hypothesis test: Group of answer choices has no tails is two-tailed is left-tailed is right-tailed The following are a random sample of adult ski sweater prices are from the Gorsuch Ltd. Winter catalog: {$212, $292, $278, $199$280, $236} Assume the underlying sweater price population is approximately normally distributed. A hypothesis test is done to determine whether the average price of all adult ski sweaters from Gorsuch Ltd. is at least $275. The correct distribution to use for the hypothesis...
A two-sided hypothesis test is being conducted for testing the mean of a normal distribution at...
A two-sided hypothesis test is being conducted for testing the mean of a normal distribution at the 85% level. The hypothesized mean value is 84 whereas the true mean is 86 with the variance being equal for both the hypothesized and real distributions at the value of 17.20. The sample size is 10. What are the values of the following in the asked order: Pr(Failing to reject the null hypothesis when it is false), Pr(Rejecting the null hypothesis when it...
To find the sampling distribution of x bar, we need to: Group of answer choices Compute...
To find the sampling distribution of x bar, we need to: Group of answer choices Compute the mean of the standard error Compute the mean of the proportion Collect many samples, then find the mean of each sample Collect many samples, then find the mean of the proportion To use the Central Limit Theorem: Group of answer choices We need to know the type of distribution the underlying population follows We do not need to know the type of distribution...
A. CHECK ALL THAT ARE CORRECT: The t-distribution is Group of answer choices flatter and more...
A. CHECK ALL THAT ARE CORRECT: The t-distribution is Group of answer choices flatter and more spread out than the normal distribution closer to the normal distribution when df is very high closer to the normal distribution when df is very low more positively skewed than the normal distribution B. In the context of a one-sample t-test, what is the estimated standard error, sm, for a sample size of n = 4 with s2 = 16? c. For a one...
1. In a standard normal distribution, the Group of answer choices mean is 1 and the...
1. In a standard normal distribution, the Group of answer choices mean is 1 and the standard deviation is 0. mean and the standard deviation can have any value. mean is 0 and the standard deviation is 1. mean and the standard deviation are both 1. 2. For the density curve below, which of the following is true? Group of answer choices It is skewed left. The mean is about 0.7. The total area under the curve is 1. It...
If I want to compare the performance of a particular group to an established, accepted average...
If I want to compare the performance of a particular group to an established, accepted average but information about the population standard deviation is not available. I should Group of answer choices conclude this cannot be done. conduct a one-sample t-test. conduct a one-sample z-test. conduct a correlated t-test. Why, in some cases, is a measure of association needed in addition to a p-value for a statistical test? Group of answer choices The p-value only specifies the reliability of the...
(a) standard error        (b) F-ratio                   (c) assumption      (d) degrees of freedom (e) null...
(a) standard error        (b) F-ratio                   (c) assumption      (d) degrees of freedom (e) null hypothesis      (f) control group         (g) experiment      (h) alternative hypothesis       (i) power                     (j) normal distribution (k) randomness     (l) directional test (m) effect size             (n) single-blind           (o) double-blind   (p) sampling distribution (q) Type I error           (r) Type II error          (s) Cohen’s d      (t) central limit theorem 1) The probability to reject the null hypothesis (when it is indeed false) refers to (   type I...
Assume that a hypothesis test of the given claim will be conducted. Identify the type I...
Assume that a hypothesis test of the given claim will be conducted. Identify the type I or type II error for the test. The principal of a school claims that the percentage of students at his school that come from single-parent homes is 11%. Identify the type II error for the test. Group of answer choices
For each hypothesis, the specific statistical test appropriate for testing the hypothesis should be described and...
For each hypothesis, the specific statistical test appropriate for testing the hypothesis should be described and a brief description of why the chosen test is most appropriate should be included. One Sample t-test, Two sample t-test, Two related (correlated/paired/dependent)sample t-test, One Factor (one way) analysis of variance (ANOVA), Factorial for two way/facot Analysis of Variance (Anova), One Variable Chi-Square test, two variable chi square test, correlation, or linear regression Example: 1. People who work in a sedentary job are more...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT