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1. In a hospital's shipment of 3,500 insulin syringes, 14 were unusable due to defects. Is this sufficient evidence to reject future shipments from this supplier if the hospital's quality standard requires 99.7 percent of the syringes to be acceptable?
(a) May normality of the sample proportion p be assumed?
(b) Conduct a hypothesis test at 1 percent level of significance. Clearly state the hypotheses, decision rule and conclude accordingly.
2. If you repeated a hypothesis test 1,000 times ( in other words, 1,000 different sample of same size from the same population), how many times would you expect to commit a Type I error, assuming the null hypothesis is true, if (a) ? = .05, (b) ? = .01
false-positives in testing for hiv. a rapid test for the presence in blood of antibodies to hiv gives a positive result
Identify the null hypothesis, alternative hypothesis, test statistic, Critical Values, conclusion about the null hypothesis, and final conclusion that addresses the original claim.
Compute the mean of the distribution of the sample means and the population mean. What is true about the two values?
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
a small gasoline station next to an interstate highway is open for 24 hours per day and has one pump and room for two
a nine coins are tossed. let x be the number of coins that turn up heads. find px 4 and px 6.b a coin is tossed
Is there evidence to reject the hypothesis that the apartments are equally distributed between 1-bedroom, 2-bedroom, and 3-bedroom apartments, at alpha = .05?
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. The null hypothesis of equality of means is rejected. What conclusion can be made f..
professor fair believes extra time does not improve grades on exams. he randomly divided a group of 300 students into
You are considering adding a new food product to your store for resale. Explain how many units of the new product should be purchased for resale.
although the phenomenon is not well understood it appears that people born during the winter months are slightly more
Insurance policies ever have to pay out. You decide to test his claim at the a=0.1significance level. With a critical value of -2.33, compute the sample statistic.
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