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What critical value t* from Table C would you use for a confidence interval for the mean of the population in each of the following situations? An 80% confidence interval from a sample of size 7.
A bag contains 3 red, 5 orange, and 8 green jellybeans. What is the probability of reaching in the bag and randomly withdrawing 10 jellybeans so that the number of red ones is 3, the number of orang
Address the issue of extrapolation and using regression equations to forecast far into the future. Explain the dangers of extrapolation from an accuracy standpoint and an ethical viewpoint.
Phone calls arrive at the rate of 48 per hour at the desk for regional airways. Compute t he probability of recieving three calls in a 5 minute interval of time
Identify and comment on the ethical issues involved in using sample data to make inferences about populations.
A country is considering raising the speed limit on a road because they claim that the mean speed of vehicles is greater than 30 miles per hour. A random sample of 15 vehicles has a mean speed of 35
An insurance agent says the standard deviation of the total hospital charges for patients involved in a crash which the vehicle struck a construction barricade is less than 3300.
Is there evidence of a difference between males and females in the proportion who enjoy shopping for clothing for themseles at the .01 level of significance?
An advertisement for Cold-Ex claims at 40 percent end-of-treatment clinical success rate for the treatment of flu. 11 flu patients are given Cold-Ex and are later checked to see if the treatment was
Kim is playing Scrabble. What is the probability that she chooses the tile with the letters of her name, in order, when she draws three tiles from the bag? ( Assume that when she begins there is one
The table below shows the number and types of cars competing in a sports car rally.
Two dice are tossed. Let A be the event that "the sum is 7." Let B be the event that "first die is 6." Let C be the event that "second die is 4 or more." Explicitly, write each event and calculate i
A population of 100 healthy men was followed for the development of prostate cancer as described herein: After being followed for 5 years, 20 men developed prostate cancer.
The new father's parents like only 1 of the boy names and 2 of the girl names. Assuming that the new parents have one child of each gender, what is the probability that the names they chose will mak
Perform one-way ANOVA on both fuel and propellers. Tell whether you have the same answer as part (a). Show both p-values and rejection region. Use 5% level.
What is the probability that the colors are depleted in the order blue, red, green? What is the probability that the group of blue balls is the first of the three groups to be removed?
The manufacturer replaces free all motors that fail while under guarantee. If she is willing to replace only 3% of the motors that fail, how long a guarantee should be offered? Assume that the lifet
Students in a class are asked how often they read online newspapers. They answer using a 1,2,3,4,5 scale, where 1 = "never" and 5 = "every day." Their data are as follows: 4,5,1,1,5,3,1,4,1,5,3,5.
Which of the following contain the least amount of information as to whether the distribution of a population contains gap
The mode of a continuous distribution is the value x* thatmaximizes f(x). Does the uniform distribution with parameters a and have a singlemodel? Why or why not?
Assuming that no failures occur in standby and that the average duration of a storm is 10hr, what is the reliability of the genrator system
The airline desires to have a system MTTF of 2000hr. Determine the minimum MTTF of the main computer to achieve this goal assuming the standby computer does not change
Assuming A, G, C, and U can appear any number of times in a nucleotide chain and that all sequences are physically possible, what is the minimum length the chains must attain to have the capability
Denote F the cumulative distribution function of this distribution law. Epress each of the following probabilities through the values of F:
An urn contains three red balls and four black ones. The two balls are drawn at random (without replacement). The random variable X is the number of red balls among the balls drawn during our experi