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A credit bereau analysis of undergraduates students found that the average number of credit cards in an undergraduates wallet is 4.09. A researcher thought the actual total may be higher and surveyed 132 students at random and the results showed a sample mean of 5.1 cards with a sample standard veviation of 1.2. Is there convinving evidence at the .05 significance level to support the claim that the actual number of cards is an undergrads wallet is greater than 4.09.
a) state the null and alternative hypothesisb)whcih formula do you usec)calculate the test statisticD)state the critical valuee)state your conclusion.
Why is the F distribution important? How do you determine if a significant difference exists among the groups in ANOVA? How do you determine differences between the groups in ANOVA?
Given that we have collected pairs of observations on two variables X and Y , we would consider fitting a straight line with X as an explanatory variable if:
Conclude whether the given conditions justify using the methods of this section when testing a claim about a population mean µ.
What is the probability that the kickoff will go between 60 and 75 yards if the average kickoff is 50 yards with a variance of 49?
Variance hour 100 and battery y: sample size 12,mean hour 1020,variance hour 121. can you conclude that two types of batteries are having the same mean life?
The weights of eggs produced on a farm are normally distributed with a mean of 1.4 ounces and a standard deviation of 0.4 ounces. How many 1200 eggs are within 2 standard deviations of the mean?
Write out the multiple regression equation using the given data.
Describe the difference in the fit provided by the two estimated regression equations.
For binomial distribution among given values for n as well as p state whereas or not it is suitable to use normal distribution as an approximation.
How do we use a least squares regression line? What is the range for the coefficient of determination?
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
In a certain state, an appeals court consists of seven judges. For a routine case, three judges are chosen at random as a panel to hear a case and render a decision. How many distinct panels can be formed?
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