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Everley's syndrome is a rare congenital disease that generally causes a reduction in the concentration of blood sodium. This is thought to provide a useful diagnostic sign as well as a clue to the efficacy of treatment. Little is known about the subject, but the director of a dermatological department in a London teaching hospital is known to be interested in the disease and has seen more cases than anyone else. The blood sodium concentrations of the 18 patients he has seen have a distribution that appears to be bellshaped with a mean of 115 mmol/L and a standard deviation of 12 mmol/L. You need to construct a 95% confidence interval for the mean of all such blood sodium concentrations.
What is the critical value? (a)1.734 (b)1.740 (c.)1.960 (d) 2.101 (e) 2.110
1. what is sampling? briefly explain the various methods of sampling.2. a company appoints four salesmen a b c and d
In a one-tail hypothesis test where you reject H0 only in the lower tail, what is the critical value of the Z test statistic at the 0.01 level of significance?
forty percent of the homes constructed in the quail creek area include a security system. three homes are selected at
suppose that a random variable x has the probability distributionfxx 0 if x lt 0x214 if 0 greaterthanorequalto x lt
the weights of a random sample of 10 firs ants was the following in milligrams1.2 3.1 3.9 2.3 3.4 8.0 4.8 3.9
Locate a business periodical such as Fortune or Forbes or a business newspaper such as The Wall Street Journal. Find three examples of the use of a graph to display data. For each graph
an urn contains six chips numbered 1 through 6. two are chosen at random and their numbers are added together. what
Perform linear regression on these, data taking the price as the independent variable and the quantity sold as the dependent variable, and then choose three FALSE statements.
Is your sample of MSU students significantly different from the population of MSU students in terms of the number of classes they take per semester (use alpha level .05)? To answer this question, follow all of your steps for hypothesis testing.
Estimate the proportion of faculty members with no publications and give a 95% Cl for your estimate.
The squad wants to have at least 95% confidence of being able to handle all the calls received in a day. At least how many calls a day should the squad be prepared for?
For this situation, state the null and alternative hypotheses in verbal terms, then identify what would constitute a Type I error and a Type II error in this situation.
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