Assume that each of your calls to a popular radio station has a probability of 0.02 of
connecting, that is, of not obtaining a busy signal. Assume that your calls are independent.
What is the probability that your first call that connects is your tenth call?
Assume that each of your calls to a popular radio station has a probability of 0.02 of
connecting, that is, of not obtaining a busy signal. Assume that your calls are independent.
What is the probability that it requires more than five calls for your to connect?
Assume that each of your calls to a popular radio station has a probability of 0.02 of
connecting, that is, of not obtaining a busy signal. Assume that your calls are independent.
What is the mean number of calls needed to connect?
Determine the mean of the coating thickness.
Determine the mean and variance of the coating thickness.
If the coating costs $0.50 per micrometer of thickness on each part, what is the
average cost of the coating per part?
State the null and the alternative hypotheses.
Calculate the expected frequency of high school students who are in favor of
commercial stations.
Compute the test statistic.
Determine the p-value and perform the test at 95% confidence.
Allied Corporation is trying to determine whether to purchase Machine A or B . It
has leased the two machines for a month. A random sample of 5 employees has beentaken. These employees have gone through a training session on both machines. Below
you are given information on their productivity rate on both machines.
State the null and alternative hypotheses for a two-tailed test.
Allied Corporation is trying to determine whether to purchase Machine A or B . It
has leased the two machines for a month. A random sample of 5 employees has beentaken. These employees have gone through a training session on both machines. Below
you are given information on their productivity rate on both machines.
Compute the test statistic.
Allied Corporation is trying to determine whether to purchase Machine A or B . It
has leased the two machines for a month. A random sample of 5 employees has beentaken. These employees have gone through a training session on both machines. Below
you are given information on their productivity rate on both machines.
Compute p-value and test the null hypothesis stated in Problem 11 at the 10% level.
Let x equal advertising expenditures ($1000s) and y equal revenue ($1000s).
Use the method of least squares to develop a straight line approximation of the
relationship between the two variables.
Test whether revenue and advertising expenditures are related at a 0.05 level of
significance. Show the test value and the decision.
There are two students, A and B , who compare their examinatorial scores with 36
times. We use 1 to represent the compared result if the score of A is higher than thatof B ; otherwise, we use 0. The final compared result is sequentially listed as follows.
111001110000110011101011010011011101
At α = 0.05 , is there enough evidence to claim that the learning performance of
A is higher than that of B ? Show the test value and the decision.
There are two students, A and B , who compare their examinatorial scores with 36
times. We use 1 to represent the compared result if the score of A is higher than thatof B ; otherwise, we use 0. The final compared result is sequentially listed as follows.
111001110000110011101011010011011101
At α = 0.05 , is there enough evidence to claim that that the order of win/losing is
random? Show the test value and the decision.
There are two students, A and B , who compare their examinatorial scores with 36
times. We use 1 to represent the compared result if the score of A is higher than thatof B ; otherwise, we use 0. The final compared result is sequentially listed as follows.
111001110000110011101011010011011101
At α = 0.05 , if we want to show that the learning performance of A is certainly
higher than that of B , how many wins of A could come to this conclusion?
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