According to the National education Association (NeA), teachers generally spend morethan 40 hours each week working on instructional duties (NeA website, April 2012). Thefollowing data show the number of hours worked per week for a sample of 13 high schoolscience teachers and a sample of 11 high school english teachers.High School Science teachers: 53 56 54 54 55 58 49 61 54 54 52 53 54High School English teachers: 52 47 50 46 47 48 49 46 55 44 47a. What is the median number of hours worked per week for the sample of 13 highschool science teachers?b. What is the median number of hours worked per week for the sample of 11 highschool english teachers?c. Which group has the higher median number of hours worked per week? What is thedifference between the median number of hours worked per week?
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.
According to the National education Association (NeA), teachers generally spend more
than 40 hours each week working on instructional duties (NeA website, April 2012). The
following data show the number of hours worked per week for a sample of 13 high school
science teachers and a sample of 11 high school english teachers.
High School Science teachers: 53 56 54 54 55 58 49 61 54 54 52 53 54
High School English teachers: 52 47 50 46 47 48 49 46 55 44 47
a. What is the median number of hours worked per week for the sample of 13 high
school science teachers?
b. What is the median number of hours worked per week for the sample of 11 high
school english teachers?
c. Which group has the higher median number of hours worked per week? What is the
difference between the median number of hours worked per week?
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