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Suppose that we are testing H0: µ = µ0 versus H1: µ > µ0. Calculate the P -value for the following observed values of the test statistic (round all answers to 4 decimal places).
(a) z0 = 2.35,
(b) z0 = 1.53,
(c) z0 = 2.00,
(d) z0 = 1.85,
(e) z0 = -0.15.
Does this sample indicate that the insurance company should change its premiums because life expectancy has increased?
A nectarine-packing firm claims that the nectarines they ship have a mean weight of 5.22 ounces. A test on n = 10 randomly selected nectarines, gave the following results, in ounces:
Analyze and support whether you believe that the changes recommended are statistically valid and sound enough to make practice changes in a hospital for the two papers listed below. Also in your answer please touch on the following items
Create a 90 percent confidence interval for the population proportion of all such firms with this as the primary motivation.
A sample of PVC pipes coming off a production line were tested for pipe diameter size. The statistical results (in millimeters) were:
Test whether the music reduces studying capacity at a .05 level of significance.
A drawer contains 11 identical red socks, and 8 identical black socks. Suppose that you choose 2 socks at random in the dark
The random digit dialing machine is expected to reach a live person 15% of the time. In eight attempts, what is the probability of achieving exactly two successful calls?
He will then compare the season batting averages of group A (those with ballet training) and group B (those without ballet training) by comparing the mean of group A with the mean of group B.
Suppose a organization takes a random sample of 1000 voters and ask them whether they approve of the job performance of the president. What sampling distribution is related to thin process.
Sketch a scatter plot that could represent data from each of following. Label the axes to indicate the independent and dependent variable.
Expected value, variance and standard deviation.A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.
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