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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.
The port of Trop can service only 1 ship at a time. However, there is mooring space for 3 more ships. Trop is a favorite port of call, but, if no mooring space is available the ships have to go to the next port.
430 randomly selected light bulbs were tested in a laboratory, 224 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours.
Suppose that 20 minutes are selected independently and weighted. Let Y equal the number of these mints that weigh less than 30 grams.
The following data (in pounds), which were selected randomly from a normally distrubuted population of values, represent mearsurements of a machine part that is supposed to weigh, on average, 8.3 pounds.
If the loss of weight of customers at the end of their first month is normally distributed with a mean of 6.7lbs and a standard deviation of 0.81lbs
In a random sample of 184 college students, 97 had part-time jobs. Find the margin of error for the 95% confidence interval used to estimate the population proportion.
What are the similarities between dividing two fractions and dividing two rational expressions?
Give an example of a repeated measures analysis of variance (ANOVA)--no examples of therapy or temperature.
You conduct a hypothesis test and you observe values for the sample mean and sample standard deviation when n=25 that do not lead to the rejection of the null hypothesis (the p value is .0667).
A loaf of bread is normally distributed with a mean of 22 oz. and a standard deviation of 0.5 oz. What is the probability that a loaf is less than 22.25 oz.?
A stationery store wants to estimate the total retail value of the 300 greeting cards that it has in its inventory. What are the upper and lower limits of the 95% confidence interval estimate of the population total value of all greeting cards tha..
Determine how large a sample would be necessary to estimate the population proportion with a margin of error of .05 at 95% confidence.
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