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1. For a standard normal model, find the z-value that is less than the mean and for which 67% of the area under the standard normal curve lies to the right?
2. A sample of 850 people resulted in a confidence interval estimate for the proportion of people who believe that the Fed. Gov.'s proposed tex increse is justified is between .14 and .20. Based on this info, what was the confidence level used in the information?
3. Given H(sub A): p (no equal to) p (sub zero), what is the P-value if the test statistics is calculated to be z= -.12
question a market researcher wants to test to determine if families of four in city a spend less per week on average
question aggregate responses to three questions were obtained from a survey of 100 males and 100 females who were
a bridge hand thirteen cards is dealt from a standard 52-card deck. let a be the event that the hand contains 4 aces
The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall semester on the basis of past experience.
q1 a researcher suggests that male nurses earn more money than female nurses. a survey of 16 male and 20 female
The F-test cannot be used to answer whether or not there is a significant difference between the means.
The following data lists the number of hours spent working during the previous week. From these data round the relative frequencies to three decimal places.
assume that a quality characteristic is normally distributed. an x-bar control chart is constructed with 3 sigma
Many educators feel their grades should fit a normal distribution and often apply curves to make them fit one. One way to do this is to convert numeric grades to z scores using the mean and standard deviation for the grades, then use an equation s..
for your study on the food consumption habits of teenage males you randomly select 10 teenage males and ask each how
What is the degree of correlation between the dependent variable and the independent variable? Is the statistical significance of the model as a whole less than the desired statistical significance for the regression model? Explain the basis for yo..
If the level of significance is 0.05, what is critical value to set up the decision rule to test the claim that the liberal arts students perform better than engineering students on average?
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