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In a test of the hypothesis that alcohol consumotion affects reaction time, a reasearcher reports that an alpha lever of .05 the null hypothesis was rejected. Based on this report, what can be stated about the relation between mean reaction time for those given alcohol and those who were not given alcohol? For this study, what is the probability that the obtained difference in reaction time is simply due to random variability rather than the effect of alcohol?
One sample has SS = 48 and a second sample has SS = 32. When both samples have n =5, what is each sample variance and computed pooled variance?
Five hundred draws are made at random with replacement from a box of numbered tickets; 276 are positive. someone tells you that 50% of the tickets in the box show positive numbers.
sapphire coffeejennie garcia could not believe that her career had moved so far so fast. when she left graduate school
Automobiles arrive at the drive-through window at a post office at the rate of 4 every 10 minutes. The average service time is 2 minutes. the Poisson distribution is appropriate for the arrival rate and service times are exponentially distributed.
Assume that each of the following studies cannot be analyzed using a parametric procedure. For each of the following studies (below), indicate the appropriate nonparametric procedure, and explain why you chose it.
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = . 05, does vehicle type vary by mall location?
Which hypothesis-testing procedure would you use in the following situations? The mean time an American family lives in a particular single-family dwelling is 11.8 years.
A survey of random sample of people leaving an amusement park showed an average expenditure number 10.30k for the evening.
mr. smith was admitted to the hospital for surgery on his left knee. when mr. smith woke up from the anesthesia he
Can the researcher conclude that humidity has a significant effect on eating behavior? Use a two-tailed test with α=.05. Compute the estimated d and r2 to measure the size of the treatment effect.
The company production manager feels that a standard deviation of more than three bodies a day indicates unacceptable production rate variations. Explain whether this is acceptable?
the p-value for a one-sided test for a mean was 0.04. the p-value for the corresponding two-sided test would bea 0.02 b
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