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Jones figures that the total number of thousands of miles that an auto can be driven before it would need to be junked as an exponential random variable
In playing the Lemonade Stand Game, Bob decreased his price per cup by two cents, from $.27 per cup to $.25 per cup.
Assuming boy and girl children are equally likely and births are independent, if parents have two children, what is the probability that at least one is a boy?
Researchers at the Cornell University Food and Brand Lab conducted an experiment at a fitness camp for adolescents (Wansink & van Ittersum, 2003)
For each of the following three scenarios, state which hypothesis test you would use from among the four introduced so far: the z test, the single-sample t test
Assume you are the manager of a paint manufacturing factory. Your company has received complaints from customers
Your opponent specifies 3 successives results of tosses of a coin, e.g. HHT. You then specify another such result, e.g. THT.
Numeric results for several independent-samples t tests are presented here. Decide whether each test is statistically significant
An absent-minded nurse is to give Mr. Brown a pill each day. The probability that the nurse forgets to administer the pill is 2/3.
A bicycle safety organization claims that fatal bicycle accidents are uniformly distributed throughout the week. The table below shows the day of the week
Prove or give a counterexample. If E1 and E2 are independent, then they are conditionally independent given F.
Three prisoners are informed by their jailer that one of them has been chosen at random to be executed and t he other two are to be freed.
If there are 12 strangers in a room, what is the probability that no two of them celebrate their birthday in the same month?
A true-false question is to be posed to a husband and wife team on a quiz show. Both the husband and the wife will, independently.
An automobile manufacturer advertises that the mean petrol consumption of its new hybrid car does not exceed 4.6 litres per 100 km
A pair of fair dice are thrown 24 times independently, it is more likely than not that a double six does not appear.
It has been said that from the point of view of the general population, Type I errors are particularly undesirable.
For its validity, all hypothesis testing depends heavily on the assumption that the sample that is used was drawn using probability sampling techniques.
You are doing a study examining the effects of studying method on academic achievement. All the students in your study take a course on genetics
Plasma-Glucose levels are used to determine the presence of diabetes. Suppose the mean in (plasma-glucose) concentration (mg/dL) in 35 to 44-year-olds
Theories have been developed about the heights of winning candidates for the U.S. presidency and the heights of candidates who were runners-up
An earlier study claims that U.S. adults spend an average of 114 minutes with their families per day. A recently taken sample of 25 adults
A sample of size n = 20 is randomly selected from a normal population with mean µ = 90 and standard deviation = 5. Find the following
Suppose the probability that a juror votes a guilty person innocent is 0.2. whereas the probability that the juror votes an innocent person guilty is 0.1.
The recommended daily allowance (RDA) of cobalamine (vitamin B12) for growing teens is 2.4ug (micrograms). It is generally believed that growing teens