Standard score B) Standardized score C) z statistic
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When calculating a z score for a distribution of
A) |
Standard score |
B) |
Standardized score |
C) |
z statistic |
D) |
Central limit theorem |
Question :
When calculating a z score for distribution of means, we refer to the z score as a.....
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- 1. Given the data set: {3, 5, 6, 9, 4,7,4,2,3,9, 1, 3, 8} provide the following rounded to two decimal places if needed) The mean а) b) The median The mode c) The range _The midrange d) e The five number summary f) g) A box and whisker plot: draw below using the provided number line for scale. 3 6 10 1 2 4 7 89 h) Is this data set skewed_yes - positive/right, yes - negative/left or no - symmetric (circle one) _The standard deviation (O i) j) Most of the data in the set above are between - 6 and u6. Calculate these values and verify this statement based on the set above. k) According Chebyshev's Theorem, what fraction of the set lie within 2 standard deviations of the mean? Verify this based on the set aboveAFDA Main Ideas: Module 9 Review 1) The measures of center: 2) Measures of spread: 3). When describing a data set, the mean is used with used with 4) Z-scores are used to compare data that is 5). What is the formula for finding the z-score? 14 6). The z-score of the mean is always z = 7). What are the characteristics of a normal distribution? and and and the median is 8). What two characteristics make a distribution go from "normal" to "standard normal?"Which of the following statistics are unbiased estimators of the population parameter? Select all that apply. A) Sample mean B) Sample proportion C) Sample range
- A normal distribution represented inzscores is referred to as a: a) normal distribution b) normal bell-curve c) standard normal distribution d) standard normal tableWhich statement describes box-and-whisker plots? A) they are divided into sections using quartiles and extremes B) they are created by first writing a data set in order from least to greatest C)they show how a data set is distributed D) all of the aboveO a. the OLS estimate of r is biased due to sample selection. O b.the OLS estimate of r is unbiased. Oc the error u is homoskedastic. O d. the OLS estimator is BLUE.
- Diastolic blood pressures are assumed to follow a normal distribution with a mean of 85 and a standard deviation of 12. What proportion of people has diastolic blood pressures less than 80? A)0.661 B)0.338 C)0.50 D)0.75A DISTRIBUTION HAS A STANDARD DEVIATION =10. fIND THE Z SCORE FOR EACH OF THE FOLLOWING LOCATIONS IN THE DISTRIBUTION A) ABOVE THE MEAN BY 5 POINTS B) ABOVE THE MEAN BY 2 POINTS C)bELOW THE MEAN BY 20PTS D) BELOW THE MEAN BY 15 PTSa) How are Guinness Beer & the student’s t-test connected? b) Make a list of the distinguishing characteristics between continuous, discrete, and frequency data. How do you know when a variable is each type? What are examples of each? c) Define what we mean by frequency data? What type of variable(s) are we talking about? Provide a clear example. d) The following gives the number of degrees of freedom of this statistic as well as the value of the statistic. For each, use the appropriate table to find the associated p-value.
- Assume the scores on a trivia challenge test are normally distributed with a mean μ = 76 and standard deviation of o = 6. a) Alisha received a score of 80. What is the z-value of Alisha's score? (Round to two decimal places). z= b) What percentage of scores fall between 64 and 88? c) What percentage of scores are between 70 and 88? d) What percentage of scores are below 70? % % % e) Find the first quartile of the data set. (Round to one decimal place)The General Social Survey asks questions about one’s happiness in marriage. Is there an association between gender and happiness in marriage? Use the data in the table to determine if gender is associated with happiness in marriage. Treat gender as the explanatory variable. Female Male Very happy 7,609 7,942 Pretty happy 3,738 4,47 Not too happy 259 460 a) Construct a frequency marginal distribution b) What percentage of males feel not too happy? c) Is gender associated with or independent from happiness in marriage? WhyAverage monthly wages (per employee) in 4 sectors of an economy are as follows: industry: 2000 dinars, building: 2200 dinars, agriculture: 1500 dinars, services: 1800 dinars. Number of people employed in the four sectors are 5 million, 2 million, 6 million, and 2 million, respectively. Using the concept of harmonic mean compute the average monthly wages in the economy under consideration.