What are inflection points?

a point on a smooth curve where the concavity changes

What is "probability experiment"?

a process with a well-defined set of possible outcomes

What is an "Empirical"

Based on direct experience or experiment, not abstract principles.

What is a normal distribution?

A bell-shaped curve where most data is near the mean.

the midpoint is the middle point of a line segment.

What is discrete probability distribution?

Assigns probabilities to countable outcomes, sum equals 1.

What is frequency distribution?

wayto organize data by showin how often each value or group of values occur

How do you calculate variance?

Find mean, sub it from each value, square, sum, & divide by the # of values

What is the meaning of "data"

collection of facts figures observations or measurements used for analysis

The science of collecting, analyzing, and interpreting data

What are "random variables"?

a quantity whose value depends on randomness.

Find mean, variance and standard deviation of the binomial distribution with the given values of n and p. (n=50,p=0.4)

mean is 20, variance is 12, and standard deviation is approximately 3.46

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Stats quiz project

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Questions 19

Answers

1
What is the median of {3, 7, 9, 10, 12}?
12
9
10
7
2
What are inflection points?
A point on a graph where the function is undefined.
a point on a smooth curve where the concavity changes
A point where the curve reaches its maximum or minimum value.
A point where the slope of the curve is always zero.
3
What is "probability experiment"?
a process with a well-defined set of possible outcomes
experiment that guarantees an equal probability for all possible outcomes.
A test where the outcome is always predictable based on prior results.
A mathematical process used to prove causation between two variables.
4
What is an "Empirical"
A test for large samples that ignores experimental data.
A concept that predicts future outcomes without past data.
Based on direct experience or experiment, not abstract principles.
Theoretical value calculated without real-world data.
5
What is a normal distribution?
A bell-shaped curve where most data is near the mean.
A skewed distribution with an increasing trend.
A uniform distribution with equal probabilities.
A graph with evenly spaced data points.
6
What is "midpoint"
The midpoint is the point where two line segments intersect.
The midpoint is any randomly chosen point along a line segment.
the midpoint is the middle point of a line segment.
the endpoint of a line segment that divides it into two equal parts.
7
What is discrete probability distribution?
Assigns probabilities to countable outcomes, sum equals 1.
a process where probabilities can exceed 1 for highly likely events
Represents probabilities for continuous outcomes within a range.
A distribution for experiments with infinite outcomes.
8
What is frequency distribution?
a method used to predict future data values based on past occurrences
technique used to eliminate extreme values from dataset to ensure accuracy
wayto organize data by showin how often each value or group of values occur
the process of randomly assigning values to dataset to create balanced dist
9
How do you calculate variance?
Multiply all values together, then find the square root of the sum.
Find mean, sub it from each value, square, sum, & divide by the # of values
Square the mean and divide by the total number of values.
Find the median, subtract each value, and take the square root.
10
What is the meaning of "data"
consist only of numerical value as qualitative information cant be measured
a fixed and unchanging set of values that remain constant across all studie
collection of facts figures observations or measurements used for analysis
a set of randomly generated numbers used to test statistical models.
11
What is statistics?
A method for organizing numbers in sequences.
The study of numbers and their relationships.
A branch of algebra focused on probability.
The science of collecting, analyzing, and interpreting data
12
If a fair coin is flipped 3 times, what is the probability of getting exactly 2 heads?
5/8
1/4
3/8
1/2
13
If a data set has a mean of 50 and a standard deviation of 5, what is the Z-score for a value of 60?
2
1
4
3
14
What is the probability of drawing a red card from a standard deck of 52 cards?
3/4
1/4
1/3
1/2
15
What are "random variables"?
a fixed numerical value that does not change in repeated experiments
a sequence of numbers that follows a predictable pattern.
a quantity whose value depends on randomness.
is any number chosen arbitrarily without any defined probability.
16
find the probability that a donor selected at random has type B or type AB blood
68%
50%
25%
15%
17
What is the mean of the dataset? {4, 8, 12, 16}
12
14
10
8
18
Find mean, variance and standard deviation of the binomial distribution with the given values of n and p. (n=50,p=0.4)
mean is 15, variance is 9 and the standard deviation is approximately 3.00
mean is 20, variance is 12, and standard deviation is approximately 3.46
mean is 25, variance is 10, and standard deviation is approximately 3.16
mean is 20, variance is 15 and the standard deviation is approximately 3.87
19
find the probability using the standard normal distribution?: p(z < 1.16)
0.7654
0.8413
0.8770
0.9207

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