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The proportion of American births that result in the birth defect is approximately 1/33 according to Centers for Disease Control and Prevention (CDC). A local hospital randomly chooses five births a
Determine the probability of selecting a wolf that is female, given that it hunts in a medium-sized pack? Answer to 2 decimal places, not as a percent.
People with kind O-negative blood are universal donors whose blood can safely be given to anyone. Only 7.2% of population has O-negative blood.
Suppose that the children attending the daycare are independent. Let the random variable X be the number of children in this day care who have the food allergy. Determine the mean of the distributio
A local hospital randomly chooses five births and lets the random variable X count number NOT resulting in defect. Suppose the births are independent. Determine the probability that two of the five
Determine the proportion of wolves that are neither female nor hunt in medium-sized packs? Answer to 2 decimal places, not as a percent.
On the small college campus, there're 5 English professor, 4 mathematics professors, 2 science professors, 3 psychology professors, and 3 history professors. If the professor is chosen at random, de
The probability of the tourist visiting Indian Caverns is 0.80 and of visiting the Safari Zoo is 0.55. The probability of visiting both places upon the same day is 0.42. Determine the probability t
In the statistics class there are 18 juniors and 10 seniors; 6 of seniors are females, and 12 of the juniors are males. If the student is selected at random, determine the probability of selecting a
An urn contains 3 red balls, 2 blue balls, and 5 white balls. A ball is selected and its color noted. Then it is not replaced. A 2nd ball is selected and color noted. Determine the probability that
Two manufacturers supply food to the large cafeteria. Manufacturer A supplies 2400 cans of soup, and 3% are found to be dented. Manufacturer B supplies 3600 cans, and 1% are found to be dented. Give
Suppose that fans will arrive to Kentucky - U Conn final four game according to random variable W = 3X + 2Y + Z. X represents the arrival of fans from the University of Kentucky,
If Rail Freight is known to submit bids upon only 25% of the projects it considers, what decision should Transrail make? Given the information in (c), how much would a corporate spy be worth to Transr
Determine the 99% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees
Can changing diet decrease high blood pressure? A vegetarian diet as well as a low-salt diet are both promising. Blood pressure is measured upon two hundred men with high blood pressure.
The results of a test of significance are said to be statistically significant whenever:
A normal egg shell is normally distributed with the mean thickness of 0.2 mm with sigma = .01 mm. Determine the value of the test statistic for H0: Mu = 0.2 vs. H1: Mu not equal to 0.2?
Twenty years ago, the average term of employment for the Postal Service was 9 years. A sample of 100 current current postal employees found that the average time these employees had worked for the p
Mary employed a sample of 68 U.S. cities to determine the relationship between Crime (annual property crimes per 100,000 persons) and Income (median income per capita, in dollars). Her estimated reg
Body temperatures for the healthy adults are traditionally said to be 98.6 degrees. To test this traditional theory, 20 healthy adults were randomly chosen and their body temperature measured.
Prediction intervals for Y are narrowest when
Basically, which of the following statements is true ragarding the Student's t distribution and the normal Z distribution?
Determine the smallest value of n for which the sampling distribution of p-hat is approximately normal?
Assume that the mean value of interpupillary distance (the distance between the pupils of the left and right eyes) for adult males is 65 mm and that the population standard deviation is 5 mm.
Determine the p-value. (Give your answer bounds exactly.)