the general process of gathering, organizing, summarizing,
QUESTION 1
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The general process of gathering, organizing, summarizing, analyzing and interpreting data is called:
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a. |
Interential item |
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b. |
Descriptive item |
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c. |
Levels of measurement |
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d. |
Statistics |
6 points
QUESTION 2
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This year’s sophomore’s in the UCA College of Business (COB) mean ACT scores were 22.5 (example data only). If a comparison was done against the ten year mean UCA COB sophomore ACT score of 22, what hypothesis would you be testing?
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Ho: mew <= 22 Ha: mew > 22 |
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Ho: mew <= 22.5 Ha: mew > 22.5 |
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Ho: mew >= 22 Ha: mew < 22 |
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Ho: mew >= 22.5 Ha: mew < 22.5 |
6 points
QUESTION 3
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What is the following table called?
Age Number of People
20-30 16
30-40 25
40-50 51
50-60 80
60-70 20
70-80 8
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a. |
Histogram |
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b. |
Cumulative frequency distribution |
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c. |
Frequency distribution |
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d. |
Frequency polygon |
6 points
QUESTION 4
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Select the measure of central location where the sum of the deviations of each value from the data’s average will always be zero.
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a. |
Median |
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b. |
Mode |
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c. |
Mean |
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d. |
Geometric mean |
6 points
QUESTION 5
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Given a distribution with a longer left tail than right tail what can be said about the skewness?
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a. |
The distribution is skewed right |
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b. |
The distribution is standard normal |
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c. |
The distribution is negatively skewed |
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d. |
The distribution has many outliers |
6 points
QUESTION 6
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If two events A and B are mutually exclusive, what does the special rule of addition state?
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a. |
P(A and B) = P(A) + P(B) |
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b. |
P(A or B) = P(A) + P(B) |
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c. |
P(A or B) = P(A) * P(B) |
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d. |
P(A and/or B) = P(A) + P(B) |
6 points
QUESTION 7
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If the variance of a probability is 3.6 grams^2, what is the standard deviation?
6 points
QUESTION 8
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What type of random variable is described as a count of events occurring at a steady rate in time or space?
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a. |
Binomial |
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b. |
Poisson |
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c. |
Bernouli |
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d. |
Normal |
6 points
QUESTION 9
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A grocery store owner wants to ensure they have enough seasonal vegetables on hand. Overstocking results in spoilage if not sold and under stocking results in lost sales and potentially loss of customers. In the 20 past years they have sold an average of 100 pumpkins each day with a standard deviation of 15. If this data is used for the years order and the store owner want a 95% Confidence Interval, what Margin of Error should be used in ordering?
6 points
QUESTION 10
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The mean number of travel days per year for salespeople employed by hardware distributors needs to be estimated with a 0.90 degree of confidence. For a small pilot study the mean was 150 days and the standard deviation was 14 days. If the population mean is estimated within two days, how may salespeople should be sampled?
6 points
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