APS: Unit 1- Data Analysis

The summary statistics for selling prices (in thousands of dollars) of 35 luxury condominiums shown in the table above. Which of the following correctly determines the boundaries for outliers in this distribution?

• 545 ± 1.5(460)

• 651 ± 1.5(460)

• 651 ± 1.5(510)

• 315 - 1.5(460) and 775 + 1.5(460)

• 315 - 1.5(510) and 775 + 1.5(510)

Using the same summary statistics as in the previous problem (see image), which of the following best describes how many outliers the original data set has?

• none

• exactly one, the maximum

• exactly two, the minimum and the maximum

• at least one, the maximum (but not the minimum)

• at least one, the minimum (but not the maximum)

The table above shows the results of a survey of 34 moviegoers given the statement, "There is too much violence in movies." How much smaller is the proportion of respondents who strongly agreed with the statement than the proportion of all who disagreed?

• 0.059

• 0.176

• 0.206

• 0.265

• 0.382

Using the five-number summary given above, determine which statement could NOT be correct.

• 25% of the values are less than 560

• 25% of the values are more than 660

• 25% of the values are between 560 and 600

• 25% of the values are between 560 and 660

• 50% of the values are between 600 and 775

Which of these boxplots comes closest to correctly representing the five-number summary given from the data table above?

• 
• 
• 
• 
• Cannot be determined with the given information.

A distribution is ~ N(25, 5). According to the Empirical Rule, approximately what percent of the data would you expect to lie between 20 and 25?

• 30

• 34

• 60

• 68

• 95

If X is normally distributed with a mean of 50 and a standard deviation of 8, which of the following is NOT a correct way to find the probability that x > 45?

• 
• 
• P(x > 45) = 1 - P(x < 45)

• P(x > 45) = 1 - P(x ≤ 45)

• All of these are correct.

Find P(-2.31 ≤ z < 1.8).

• 0.010

• 0.046

• 0.945

• 0.954

• 0.975

Which of the summary statistics are most appropriate for describing a skewed distribution?

• median and standard deviation

• mean and range

• median and IQR

• mean and standard deviation

• mode and IQR

The graph represents the responses of 100 elementary school students to the question, "What is your favorite flavor of ice cream?" The shape of the distribution can best be described as:

• skewed to the right.

• skewed to the left.

• bell-shaped.

• symmetric.

• None of the above gives an appropriate response.