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What is the difference between the null and alternative hypothesis statements in one tailed and two tailed tests?
If a test of a hypothesis has a Type 1 error probability (a) of 0.01, we mean:
In order to monitor the ecological health of the Florida Everglades, various measurements are recorded at different times.
The United States Golf Association requires that golf balls have a diameter that is 1.68 inches.
According to the U.S. federal Highway Administration, the mean number of miles driven annually is µ=12,200.
There is no significant difference in the mean wage of the three age groups with more then 12 yrs of education.
Compares the sample statistics with parameters expected for a normal distribution. Since the mean and standard deviation were fitted from the data
The owner of an Internet video supplier, Netflix, has conducted a study of habits of online customers.
A research firm wants to compare the miles per gallon of unleaded regular, mid-grade, and super premium gasolines.
Consumer reports stated that the mean time for a Chrysler Concorde to go from 0 to 60 miles per hour was 8.7 seconds.
The mean operating temperature of an aircraft engine during level cruize is supposed to be 190 degrees.
If you were a manager of a firm making a hypothesis test and the rejection of Ho would mean the firm would have to be liquidated
Sugar in Cereal. Different cereals are randomly selected, and the sugar content (grams of sugar per gram of cereal) is obtained for each cereal
A CBS News/New York Times poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given the chance
It has been reported that the average credit card debt for college seniors is $3262.
The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading company
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location
The Rutter Nursery Company packages pine bark in 50-pond bags. From a long history, the packaging department reports that the distribution is normal
Emergency room arrivals in a large hospital showed the statistics below for 2 months. At s = .05, has the variance changed? Show all steps clearly
In the population of employee of problem 1, a question was raised on whether male and female above 50 make the same wage.
The manufacturer of batteries for aircraft emergency vehicles claims that lifetime of the 1500 batteries that have been manufactured is normally distributed
The buyer of shirts for a department store wants to test whether shirts with sleeve labels of "33 inches" are at least that specification on average
The sales of home appliances have increased greatly in recent years. A study sponsored by the home appliance industry is aimed at testing the hypothesis
A man is on trial accused of murder in the first degree. The prosecutor presents evidence that he hopes will convince the jury to reject the hypothesis
Suppose that you perform a significance test regarding a population mean, and that the evidence does not warrant rejection of the null hypothesis