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In order to monitor the ecological health of the Florida Everglades, various measurements are recorded at different times. The bottom temperatures are recorded at the Garfield Bight station and the mean of 30.4 C is obtained for 61 temperatures recorded on 61 different days. Assuming that the population standard deviation is 1.7 C
1. what is the point estimate for the pop mean of all temp.
2. which confidence interval would we likely use? Z or T?
3. construct and interpret a 95% confidence internal estimate of the pop mean of all such temps
4.construct and interpret a 90% confidence internal estimate of the pop mean of all such temps
5. how big of a sample would we need to take if we wanted to find a 00 percent confidence interval with margin of error of only 0.1 degrees celcius
Motorola takes two weeks to supply an order. if the store manager is targeting a fill rate of 99%, what safety inventory should the store carry? What should its ROP be?
How would you choose an appropriate level of significance for your statistical test? What are the possible outcomes and limitations of your statistical test?
Let p vary from 0.02 to 0.20 in increments of 0.02. b) Sketch the graph of the probabilities of the lot acceptance as the p value varies from 0.02 to 0.20.
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
State your hypothesis, draw your curves, label your critical values and your test statistic, state your decision to accept or reject and write your conclusion in the language of the problem. Use a=0.05.
A school administrator randomly selects 12 classes from your school and then selects all of the students of those classes to study a school library issue. Which type of sampling design is being used.
The fill amount of bottle of soft drink has been found normally distribute with a mean of 2.0 liters and a standard deviation of 0.05 liters. If a random sample of bottles is selected, what is the probability that the sample mean will be between 1..
If we assume that the lifetime of this type of bulb has a standard deviation of 400 hours, can we conclude at the 5% significance level that the claim is true.
Suppose Abraham Lincoln had answered a survey questionnaire in which he indicated that he had not received a grade school diploma. The researcher found that Lincoln's educational score did not correlate with the expected variables. What was wrong?
Considering the four weights and assuming the weights are independent with a constant variance, obtain the least square weights of A and B.
Determine the coefficient of determination R 2 . Determine standard error of the estimate s e .
If you were using the relative frequency of an event to estimate the probablility of the event, would it be better to use 100 trials or 400 trials according to the law of large numbers?
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