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A textile mill weaves cloth that is used to make sheets. The top grade of sheets has at least 200 threads per inch. (Because higher thread count indicates higher quality, it will not matter if the thread count is above 200.) Random samples from 35 areas of a piece of cloth result in an average thread count of y = 190 with s = 50.
(a) Test the appropriate hypothesis by comparing with a critical value using o: = 0.05, and explain what your results mean.
(b) Compute the p-value for the test in part (a) and use it to perform the hypothesis test.
In Hoppe's urn scheme, let Zn denote the number of animals of the oldest species after n iterations. Find a closed-form formula for the mean and the variance of Zn for a general ().
Hypothesis testing of single mean - The Wall Street Journal reported that the 30-year mortgage rate is now less than 6%.
Using the appropriate statistical table, what is the most accurate statement we can make about the p-value for the test?
A pharmaceutical company conducted study to evaluate the effectiveness and safety of new inhaled form of insulin for treatment of diabetes. A group of 650 diabetics was given the drug twice a day, while another group of 650 diabetics was given an ..
A company tracked the number of complaints it received during the first 6 months of last year, as shown in the following table:
question while attending a sales meeting you were asked about the relationship between sales calls and actual sales
intelligence tests are designed to provide a normal distribution of iq scores with a mean of 100 and a standard
If 2 circuit boards are selected at random without replacing the first, what is the probability both circuit boards are defective?
Weights are distributed normal with a mean of 132 pounds and a standard deviation of 27.4 pounds. In a random sample of 150, how many of them would be expected to weigh between 100 and 115 pounds?
in order to increase revenue many video game publishers sell downloadable content dlc separately from the main game.
a study was done on the propagation of an ultrasonic stress wave through a substance. in particular attenuation in
Let A be the event that a randomly chosen employee has a college degree and B the event that the chosen employee's income is more than $50,000.
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