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A training director for a large company has been told that, on completion of the training course, the average score of her trainees on the final evaluation should be 100. Her only concern is whether she will have to begin remedial steps to ensure that the population of trainees is not below standard. She draws a random sample of 10 scores of recent trainees:94,98,101,90,86,102,95,100, 98, and 92.
(a) State the null and alternative hypotheses best suited to the nature of her inquiry.Test the null hypothesis
(b) at the .05 level of significance and state your conclusions and
(c) at the .01 level of significance c12.qx and state your conclusions.
(d) What is the probability of obtaining through random sampling a sample mean as low or lower if X is as stated in the null hypothesis?
At α = 0.10, can the researcher conclude that alcohol consumption is related to sex? What kind of Chi-Square test is this?
Could such a low average be considered just bad luck or should he be sent back to the minor leagues? Comment on the assumption of Bernoulli trials in this situation.
you conducted a t-test in your capstone research. you did not find a statistically significant difference between your
Ages of presidents. Joe is writing a report on the backgrounds of American presidents. He looks up the ages of all 43 presidents when they entered office.
What fraction of the houses in the sample are located in each region? What fraction of the houses in the sample are of each style?
Wireless service spending The total amount spent in the United States for wireless communication services, S (in billions of dollars), can be modeled.
Construct a histogram using the Histogram option in Data Analysis to check the assumption of normality. Does the data appear to be normally distributed? Comment.
Use Excel to calculate the binomial probability P(X = 7 | n = 12, = 0.50) = 1 - P(X = 6 | n = 12, = 0.50). (Round your answer to 4 decimal places.)
The volatility of the? stock's returns is 36?%, and the? risk-free rate is 66?%. What is the Black and Scholes value of this? option?
The supplier agrees they will deliver on the day the order is placed. Note that the basic unit of measurement for a period is one year in this case.
The probability that you win is 6/36=1/6, and P(loss) = 5/6. Find a rough range for a) 200 plays, (b) 20, 000 plays. You must show your work when you compute the SD of the box.
What is the probability that all three of them consider engineering quality to be among the most important features of the car? What is the probability that at least one of them considers this quality to be among the most important ones? How do yo..
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