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X is a random variable that represents ph of arterial plasma, the mean of the x distribution is 7.4. a random sample of 33 patients with arthritis took the drug for 3 months blood test showed an average of pH to be Xbar=8.1 with sample standard deviation s=0.6. Use a 5% level of significance to test the claim that the drug has changed(either way) the mean pH level of the blood.
Suppose you wish to test a one-tail hypothesis where you reject H0 only in the lower tail. You calculate ZSTAT = 1.38. What is the statistical decision if you test the null hypothesis at the 0.01 level of significance?
A yearbook page is to be designed so that there are 24 square inches available for print or pictures with margins of 1.5 inches on the top and bottom
Assume gasoline prices for a region are normally distributed. Do the data you obtained provide enough evidence to reject the claim?
Using the raw measurement data presented below, calculate the t value for independent groups to determine whether or not there exists a statistically significant difference between the salaries of female and male human resource managers.
a) What is the probability that for any day, the number of special orders sent out will be more than 4? b) What is the standard deviation of the number of special orders sent out daily?
Which of the following would be an appropriate alternative hypothesis?
Recognize the midpoint of the first class. Recognize the class boundaries of the first class.
Determine the setting for the mean so that no more than 1% of the cans of paint will be unacceptable.
Is it possible to normalize the data when the population shape has a known skew? How would you demonstrate the central limit theorem to your classmates?
Make your calculation supposing a two-sided two-sample t-test with a type I error (alpha) of 0.056
Determine the probability that computer will fail within 12 months?
Michelle is a counselor at the local crises center. She wishes to determine if there is a relationship between the gender of an individual and the amount of alcohol consumed.
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