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Let X be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with A random sample of 19 Australian bank stocks has a sample mean of For the entire Australian stock market, the mean dividend yield is Do these data indicate that the dividend yield of all Australian bank stocks is higher than 5.9%? Use Are the data statistically significant at the given level of significance? Based on your answers, will you reject or fail to reject the null hypothesis?
a) The P-value is less than the level of significance and so the data are not statistically significant. Thus, we reject the null hypothesis.b) The P-value is less than the level of significance and so the data are statistically significant. Thus, we fail to reject the null hypothesis.c) The P-value is greater than the level of significance and so the data are statistically significant. Thus, we fail to reject the null hypothesis.d) The P-value is greater than the level of significance and so the data are not statistically significant. Thus, we reject the null hypothesis.e) The P-value is less than the level of significance and so the data are statistically significant. Thus, we reject the null hypothesis.
Given that Z is a standard normal random variable. What is the value of Z if the area to the left of Z is 0.9382?
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
A sample of 12 homes sold last week in St Paul, Minnesota, is selected. The results are shown below and create a scatterplot. Insert the trendline into the graph and show the regression equation.
Inspection of student data generated during pre/post treatment surveys shows that among 10 subjects, 7 had higher scores after an experimental treatment
A sample of seed packets was selected, and their weights in grams were recorded as follows: 15.1, 15.6, 15.8, 15.1, 15.5, 15.9, 15.5, 15.2. Determine a 90% confidence interval for the mean weight of seeds in all packets.
The mean life of a battery used in a digital clock is 305 days. The lives of the battery follow normal distribution. The battery was recently modified to last longer. A sample of 20 of the modified batteries had a mean life of 311 days with a stan..
Consider the results of the hypothesis test you conducted above. Which of the two types of errors could you have committed? Explain the ramification of committing such an error in the context of this scenario.
According to a recent survey, the probability that a passengerfiles a complaint with the Department of Transportation about aparticular U.S. airline is .000014. Suppose 100,000 passengers whoflew with this particular airline are randomly contacted..
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 370 grams and a standard deviation of 15 grams. Find the weight that corresponds to each event:
Sampling variability refers to the idea that different samples will include different individuals
What is the difference between a one-tail and a two-tail test? How do we identify each? What is meant by a p-value?
What is the probability that a randomly selected adult regularly consumes both coffee and soda? What is the probability that a randomly selected adult doesn't regularly consume at least one of these two products?
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