1. The measure of central tendency that can be used only on ordinal-, interval-,
ID: 3320717 • Letter: 1
Question
1. The measure of central tendency that can be used only on ordinal-, interval-, and ratio-level data is the:
a. mode
b. All of the answers are correct.
c. mean
d. median
2. The owner of a sandwich shop in downtown Seattle is interested in adding new dessert options to his lunchtime menu. He asks his regular weekday customers whether or not they would pay more for these new menu items. What kind of sample has he created?
A. a representative sample
B. a convenience sample
C. a stratified sample
D. a random sample
3. The point of almost every research study is to:
A. reject the null hypothesis.
B. support the null hypothesis.
C. find at least partial support for the alternative hypothesis.
D. prove the alternative hypothesis.
4. The relationship between effect size and Type II error is:
A. when effect size goes up, Type II error goes down.
B. that the two are unrelated to each other.
C. when effect size goes up, Type II error also goes up.
D. when effect size goes down, Type II error goes down.
5. What percent of scores in a normal distribution falls above a z score of +.78?
A. 45.13%
B. 12.55%
C. 28.23%
D. 21.77%
6. When comparing a sampling distribution that includes 100 samples with N = 5 and one that has 100 samples with N = 25, it becomes clear that the sampling distribution with the:
A. larger sample size has a smaller standard error.
B. larger sample size has higher variability.
C. smaller sample size has a lower standard deviation per sample.
D. smaller sample size has a lower standard error.
7. When the standard error of the mean is small, the _____ more accurately reflects the _____.
A. sample standard deviation; standard error
B. population mean; sample mean
C. sample mean; population mean
D. sample mean; standard error
Explanation / Answer
1. mode
2. a representative sample
3.prove the alternative hypothesis.
4.when effect size goes up, Type II error goes down.
PS: We are directed to solve only first 4 parts of a question if multi part question is posted
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