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Doctors nationally believe that 68% of a certain type of operation are successful. In a particular hospital 47 of these operations were observed and 37 of them were successful. At a = 0.05 is this hospital's success rate different from the national average?no, because the test value 0.93 is in the noncritical region.
yes, because teh tset value 0.93 is in the critical region.
no, because the test value 1.58 is in the noncritical value.
yes, because the test value 1.58 is in the noncritical region.
Can the binomial distribution be used to model the number of rare events that occur over a given time period?
A bank's loan officer rates applicants for credit. The ratings can be described by a Normal model with a mean of 200 and a standard deviation of 50.
If we select a crew member at random, what is the probability the crew member earns:
At the 0.05 level of significance, is there evidence of a difference in the mean waiting times in the four locations? State your null and alternative hypotheses. (Note: while the small sample size could justify use of the non- parametric Kruskal-W..
Conduct a one-tailed hypothesis test for the mean at the .025 significance level. State the null and alternative. State the critical value. Draw a diagram. Provide the computation of the test statistics. State your decision in terms of the null hy..
Calculate the expected value of this undertaking (make sure to take into account the thief's initial wealth).
Comment on their success or failure to meet this goal.
Construct the following confidence intervals for your data set:
what is the probability that a randomly selected value from the distribution will be greater than 2.1 standard deviations avoe the mean?
Let's further suppose that there was good interrater reliability on these frequency counts of behaviours and that they are interval/ratio level of measure, normally distributed, and independent observations.
At the 0.05 level of significance, is there evidence of a significant relationship between the age groups and where people primarily get their news? If so explain the relationship.
What is the probability that the mean annual precipitation during 49 randomly picked years will be less than 101.8 inches?
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