To determine if a set of ungrouped raw data is normally distributed, what test statistic would we use?
Select one:
a. A z-statistic
b. An F-statistic
c. Anderson-Darling
d. A chi-square
Answer is c.
Anderson Darling test statistic
Because ungrouped data is parameter and distribution free.
To determine if a set of ungrouped raw data is normally distributed, what test statistic would...
To determine if a set of ungrouped, raw data is normally distributed, the cumulative relative frequency distribution of the raw data is compared to a ____________. Select one: a. Grouped relative frequency distribution b. Cumulative normal distribution c. Anderson-Darling statistic d. Chi-square statistic
Say you think that an output will be normally distributed with mean 1 and variance 1 You use the test statistic r- 1 a) At what values of x would you reject the null if your a value is set to 0.05. Hint: there are two values xŻ and xk such that if x x; or if x x, we would reject. b) Say that in actuality, z is drawn from an exponential distribution with mean 1. Thus the null...
The frequency distribution shows the results of 200 test scores. Are the test scores normally distributed? Use a =0.01. Complete parts (a) through (e). Class boundaries 49.5-58.5 58.5-67.5 Frequency, f 19 62 D 67.5-76.5 81 76.5-85.5 33 85.5-94.5 5 Using a chi-square goodness-of-fit test, you can decide, with some degree of certainty, whether a variable is normally distributed. In all chi-square tests for normality, the null and alternative hypotheses are as follows. Ho: The test scores have a normal distribution....
The frequency distribution shows the results of 200 test scores. Are the test scores normally distributed? Use α=0.01. Class boundaries 49.5-58.5 58.5-67.5 67.5-76.5 76.5-85.5 85.5-94.5 Frequency, f 202 61 79 35 5 Using a chi-square goodness-of-fit test, you can decide, with some degree of certainty, whether a variable is normally distributed. In all chi-square tests for normality, the null and alternative hypotheses are as follows. H0: The test scores have a normal distribution. Ha: The test scores do not have...
The frequency distribution shows the results of 200 test scores.
Are the test scores normally distributed?
PART B. Determine the critical
value and the rejected region
PART C. Calculate the test statistic
PART D. Decide whether to reject or fail to reject the
null hypothesis
The frequency distribution shows the results of 200 test scores. Are the test scores normally distributed? Use α= 0.01. Complete parts (a) through (d) Class boundaries Frequency, f 49.5-58.5 20 58.5-67.5 62 67.5-76.5 79 76.5-85.5...
What test would you use for comparing mean difference for paired data when observations are not normally distributed? a. Wilcoxon signed rank test b. Wilcoxon rank sum test c. McNemar test d. Freedman's test e. CHI-square test
1. The raw scores on the standardized reading test are normally distributed so the raw scores can be converted into a distribution of Z scores. If we want to mark the lower 5% of the distribution on the Z distribution, what is the Z value that is the cut-off point for that 5% tail region? (Answer with the exact Z value found from the Z table) 2. What would be the cut-off raw score if we want to mark the...
The ANOVA test requires what type of data? Select one 0 a. normally distributed and continuous data O b. normally distributed and discrete data O c. Discrete and measured data O d. Data samples with equal size
A set of data values is normally distributed with a mean of 65 and standard deviation of five. Determine the Z-score of 78. a. -1.12 b. 2.6 c. 1.12 d. -2.6
Suppose you have a normally distributed set of data pertaining to a standardized test. The mean score is 1000 and the standard deviation is 200. What is the z-score of 1600 point score?