Ad recall In Exercises 27 and 29, we see the number ofadvertised brand names people recalled immediately afterwatching TV shows and 24 hours later. Strangely enough,it appears that they remembered more about the ads thenext day. Should we conclude this is true in general aboutpeople’s memory of TV ads? a) Suppose one analyst conducts a two-sample hypoth-esis test to see if memory of brands advertised dur-ing violent TV shows is higher 24 hours later. If his P-value is 0.00013, what might he conclude?b) Explain why his procedure was inappropriate. Whichof the assumptions for inference was violated?c) How might the design of this experiment have taintedthe results? d) Suggest a design that could compare immediate brand-name recall with recall one day later.
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.
advertised brand names people recalled immediately after
watching TV shows and 24 hours later. Strangely enough,
it appears that they remembered more about the ads the
next day. Should we conclude this is true in general about
people’s memory of TV ads?
esis test to see if memory of brands advertised dur-
ing violent TV shows is higher 24 hours later. If his
b) Explain why his procedure was inappropriate. Which
of the assumptions for inference was violated?
c) How might the design of this experiment have tainted
the results?
name recall with recall one day later.
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