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To minimize cost how many units should be ordered each time an order is place?____units(round two places). How many orders per year are needed with the optimal policy?
The company operates its production facility 300 days per year. It has orders for about 11,900 flashing lights per year and has the capability of producing 105 per day. Setting up the light product
Compute the percentage of variance explained by the treatment effects Treatments A B C D SS = 24 SS = 14 SS = 26 SS = 8 critical value of F___ Is your finding significant or not? What is the percent
A random sampling was conducted by selecting fifty companies for participation that processed claims related to Hurricane Katrina. Then, one claim was randomly selected from each of the companies th
Consider use of a Student's t distribution to test the difference of means for independent populations using random samples of sizes n1 and n2.
Barbra Flynn is charge of maintaining hospital supplies at General hospital. During the past year, the mean lead demand time for bandage BX-5 was 65 (and was normally distributed). Furthermore, the
In Exercises 9.55-9.60, we have given the value obtained for the test statistic, Z, in one mean Z-test. We have also specified weather the test is two tailed, left tailed right tailed. Determine the
Use = 0.05. Solve the problem using both the critical region method and the P-value method. Since the sampling distribution of is the normal distribution, you can use critical values from the standa
Assume that the paired data came from a population that is normally distributed. Using a 0.05 significance level find the mean value of the differences d for the paired sample data, the standard dev
A single bolt is selected at random from 10,000. Three different kinds of defects A, B, and C are known to occur in these particular bolts. Type A defects occur 1.0% of the time, type B defects occu
Is the national crime rate really going down? Some sociologists say yes! They say that the reason for the decline in crime rates in the 1980s and 1990s is demographics.
Perform a sensitivity Analysis on The following Data: Possible R&D costs for a phone company are Best $20,000 with a probability of 0.8 and Worst $60,000 with a probability of 0.2
Show that Wayne's estimate is, in fact, unbiased. Compare the standard deviation of Wayne's estimate with the standard deviation of the sample mean.
In analysis of variance, which of the following is true if the F statistic is zero?
1. A study of commuting times reports the travel times to work of a random sample of 17 employed adults in New York State. The mean is xbar= 32.44 minutes and the standard deviation is s = 17.08 min
You are testing H0: M(mean) = 10 against Ha:M(mean) < 10 based on an SRS of 23 observations from a normal population. the t statistic is -3.2.
The following data are from an independent-measures experiment comparing two treatment conditions.
Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.)
For the same sample data and null hypothesis, how does the P-value for a two-tailed test of mu compare to that for a one-tailed test?
Use the weights of cans of generic soda as sample one and use the weights of cans of the diet version of that soda as sample two. Assume that the two samples are independent simple random samples se
Find the 98% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of fr
Suppose that customers arrive at a banks ATM at the exponentially distributed mean rate of 30 per hour. If a customer has just arrived, what is the probability that the next customer will arrive wit
Assume that the population distributions of times (in minutes) for two different skiers to race the same course are normal with equal variances.
Write a sentence demonstrating how a research report would present the results of the hypothesis test and the measure of effect size
Heights of trees in a forest are normally distributed. The mean and standard deviation of a random sample of size 20 trees are 30.2 feet and 4.3 feet, respectively. Find the 98% confidence interval