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A researcher wants to see if there is a relationship between birth order and personality. A sample of n = 100 people is obtained, all of whom grew up in 3-child families. On the basis of the frequencies shown below, can the researcher conclude that there is a significant difference at the .05 level?
Outgoing - 1st Birth Position (BP) - 13, 2nd BP - 31, 3rd BP - 16
Reserved - 1st Birth Position (BP) - 17, 2nd BP - 19, 3rd BP - 4
Students in a statistics class at a large state university were given the survey in which one question asked was age (in years); one student was a retired person, and her age was an "outlier".
A slot machine in Reno costs $1 to play. If the jackpot is $1,000 and the expected value is $ - 0.50 find the probability of winning.
Modern aircraft engines are very reliable. One feature contributing to that reliability is the use of redundancy, where critical components are duplicated so that if one fails, the other will work.
The best estimator or appreciative for the population proportion is 0.45. How large must the sample be?
Given the standardized normal distribution (with a mean of 0 and a standard deviation of 1, as in Table E.2), what is the probability that:
The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the outcomes consistent with the hypothesis proposed by the researchers?
Compute the value of z and state your decision regarding the null hypothesis.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Scores on a test have a mean of 73 and Q3 is 81. The scores have a distribution that is approximately normal. Find P90.
This requires you evaluate the data (on the next sheet) and apply Queueing Theory to determine the characteristics of the queues. Please refer to the concept on Queuing Theory for the procedures to do.
What is the probability that 25% or fewer male employees will indicate that they have to pick up the slack for moms working flextime?
You're responsible for planning parking needed for a new 256-unit apartment complex, and you're told to base the needs on the statistic 'average number of vehicles per household is 1.9'.
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