Read the given scenario and pick the correct test procedure. Think about the type of data, how many samples were taken and whether samples were independent or dependent.
Addition Rule of Probability
It simply refers to the likelihood of an event taking place whenever the occurrence of an event is uncertain. The probability of a single event can be calculated by dividing the number of successful trials of that event by the total number of trials.
Expected Value
When a large number of trials are performed for any random variable ‘X’, the predicted result is most likely the mean of all the outcomes for the random variable and it is known as expected value also known as expectation. The expected value, also known as the expectation, is denoted by: E(X).
Probability Distributions
Understanding probability is necessary to know the probability distributions. In statistics, probability is how the uncertainty of an event is measured. This event can be anything. The most common examples include tossing a coin, rolling a die, or choosing a card. Each of these events has multiple possibilities. Every such possibility is measured with the help of probability. To be more precise, the probability is used for calculating the occurrence of events that may or may not happen. Probability does not give sure results. Unless the probability of any event is 1, the different outcomes may or may not happen in real life, regardless of how less or how more their probability is.
Basic Probability
The simple definition of probability it is a chance of the occurrence of an event. It is defined in numerical form and the probability value is between 0 to 1. The probability value 0 indicates that there is no chance of that event occurring and the probability value 1 indicates that the event will occur. Sum of the probability value must be 1. The probability value is never a negative number. If it happens, then recheck the calculation.
please help me figure out what test each scenario is.. (propotion test, sample test etc..)
![Read the given scenario and pick the correct test procedure. Think about the type of data, how many
samples were taken and whether samples were independent or dependent.
a.) The distance travelled to campus is recorded for a sample of current students to see if students are
travelling from further away than in past years.
Select an answer
b.) An SAT exam is given to a group of students both before and after a test prep course to see if the course
was successful in raising scores.
Select an answer
c.) A random sample of current high school students is taken to see if the percentage who received
scholarships this year is lower than in the past.
Select an answer
d.) A random sample of students is taken from high school A and another random sample of students is
taken from high school B to compare the percentage of students graduating college-ready in English and
Math.
Select an answer
e.) A random sample of students is taken from high school A and another random sample of students is
taken from high school B to see if high school A had a higher mean score on the SAT.
Select an answer
f.) The weights of a random sample of babies born to mothers who had prenatal care were recorded and
compared to the weights of a random sample of babies born to mothers who did not have prenatal care.
Select an answer
g.) The time to complete a 3-mile run is recorded for a sample of cross-country runners. The runners are
then put through a training camp for 4 weeks and then their times to complete a 3-mile run are recorded
again to see if they have improved.
Select an answer
h.) A random sample of current students who graduated Palatine High School was asked if they plan to go to
Harper the following fall to see if the percentage has increased from 30%.
Select an answer
i.) A random sample of students taking CHM121 who took chemistry in high school is compared to a random
sample of student taking CHM121 who did not take chemistry in high school to see if their passing rate was
higher.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F46cbf542-936d-4dc5-b84c-049c24b2d3c0%2F5b0c5b9c-30b2-4e05-84e3-411f35c238f3%2Faaatu28_processed.jpeg&w=3840&q=75)
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