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In illinois a random sample of 85 eighth grade students have a mean score of 265 with standard deviation of 55 on the national mathematics assessment test. Result prompts are school administration to decide the mean score for the states eith graders on the examination is more than 260. At alpha equals 0.04 is there enough evidence to support the clim?Whats the claim mathematically and identify Ho and Ha.Find sd test stat 2 and its corresponding areaFind the p-valueDecide wether to reject or fail to reject HoInterpret decision in the contest of the original claim.
Find a 98% confidence interval for the percentage of all eighth graders who have used alcohol. Round the upper and lower bounds to three decimal places.
Give an example of a hypothesis test. State what the Null and the Alternative hypotheses.
Find the probability that a randomly selected teacher earns and what sample size is necessary to double the standard error of the mean and what sample size is needed to cut the standard error of the mean in half?
David Gallano, a wine merchant, has collected opinions on grape wine quality from a sample of his customers. These customers tasted wine made from grapes grown in three regions of the country.
What sampling method did you use? Construct a 95% confidence interval for the true population proportion of the SUV's. What sample size would be needed to ensure an error of +/- 0.025 with 95% confidence?
In a study of hypnosis, breathing patterns were observed in an experimental group of subjects in a control group. The measurements of total ventilation (liters of air per minute per square meter of body area) are shown below.
Find the 95% confidence interval of the mean number of ER patients treated each day at the hospital.
Find the critical value for t and determine the null and alternate hypothesis.
A Manager needs to decide between two machines to put into market following a Weibull distribution. Machine X test unit cost $3000 with beta=3 and theta=500 Machine Y test unit cost $2000 with beta=3 and theta=400
A previously used drug treatment has a mean remission time of 12.5 weeks. Does the data indicate that the mean remission time using the new drug is different from 12.5 week at a level of significance of 0.01?
You have 4 jars. In the largest jar you have three balls numbered 1 to 3. Then you have 3 colored jars. Jar 1 has a red ball and two orange balls.
Consider a machine that fills soda bottles. The process has a mean of 15.9 ounces and a standard deviation of 0.06 ounces. The specification limits are set between 15.8 and 16.2 ounces. a) Compute and interpret the machine's Cp
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