Exam 6: Characteristics of the Sample Mean

The asymptotic tails in a normal distribution represent the possibility of outliers in a data set.

What is the z score for scores in the bottom 5%?

Two normal distributions are observed.The first distribution has a mean of 12 and a standard deviation of 2.The second distribution has a mean of 0 and a standard deviation of 2.For which distribution will the z score for the mean be larger?

An example of a binomial variable includes

A binomial probability distribution is the distribution of random outcomes for a bivariate or dichotomous random variable.

The ________ converts any normal distribution with any mean and any variance to a standard normal distribution with a mean of 0 and variance of 1.

The unit normal table can be used to find the probability of a particular score for most,but certainly not all,possible normal distributions.

A therapist has a goal to reduce the mean number of patient symptoms expressed for a particular disorder to two symptoms per day.Following therapy,she determines that the z score for 2 symptoms per day is 0.Assuming the data are normally distributed,did she reach her goal?

The standard normal distribution can be used to estimate probabilities with known raw scores,but it cannot be used to estimate raw scores with known probabilities.

Scores far from the mean are located in the ________ of a normal distribution.

The first step to locating proportions in a normal distribution is to first look up probabilities in the unit normal table.

In a normal distribution,the mean can only take on positive values.

A researcher records the following time spent sleeping per night (in hours)in a group of participants: 5.8 1.8 (M SD).The researcher decides to categorize participants who sleep between 6 to 8 hours as moderate sleepers.What percentage of participants fell in this category?

What is the implication for the tails of a normal distribution being asymptotic?

Which of the following is required to locate proportions of area under the normal curve?

Another name for a binomial variable is a

In a normal distribution with 2.2 4.1 (M SD),a researcher can appropriately conclude that most scores occurred above the mean.

In a hypothetical job field,10% of workers are promoted within their first year of employment.For this hypothetical job field,what is the probability that exactly 25 workers were promoted in their first year in a random sample of 200 workers? Hint: This is a binomial distribution,where p = .10 and q = .90.

A standard normal distribution is a specific example of one of the infinitely possible normal distributions that could exist.

The z score cutoff for the top 50 percent of scores in any normal distribution is 0.