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1. A study determined that 6% of persons age 65 to 74 have a certain symptoms. A group of 18 persons age 65 to 74 are selected at random. Find the probability that at least 2 persons have the symptoms.
2. A contest at a fast-food restaurant offered the following cash prizes and probabilities of wining on one visit when a customer buys an order of French fries for $1.21. Find the expected winnings if the player buys 22 orders of French fries in multiple visits.
Prize
Probability
$100,000
1/8,504,860
$50,000
1/302,500
$10,000
1/282,735
$1,000
1/153,560
$100
1/104,560
$25
1/9,540
What are the expected winnings if the player buys 22 orders of French fries on multiple visits?
3. 10.6% of the population is 65 or older. Find the probability that the following numbers of persons selected at random from 50 peopple are 65 or older.
4. A study determined that the 3% of children less than 18 year of age live with their father only. Find the probability that at least3 percent person selected at random from 12 children less than 18 year of age lived with their father only.
5. A coin tossed 5 times. Find the probability of getting at most 2 heads.
Assume that cars are independent regarding to their paint quality. Each car has a 90% chance of passing the test. What is the probability that 3 of the next 6 cars will fail the test?
A sample of 15 workers reveal the following minutes: 29, 38, 38, 33, 38, 21, 45, 34, 40, 37, 42, 30, 29, 35. Develop 98% confidence interval for the population mean. Interpret your result.
The distribution of the serve speeds was mound-shaped and symmetric. What proportion of the player's serves was between 89 mph and 128 mph?
the mean weight of trucks traveling on a particular section of i-480 is not known. a state highway inspector needs an
What types of variables are measured using Pearson coefficient, and what types variables are measured with chi square; I am looking for names of variables (e.g., nominal, interval)?
question considerthedataset123456789a. obtainthemeanandthemedianofthedata. whatistheshapeofthe distribution?b.
in the u. s. about 15 of the population is 65 years or older senior citizens. it is estimated that 90 of seniors get a
Suppose you estimate a regression model to predict weekly expenditures on food per person. Would you be pleased if your model estimate a Standard Error =$300 EXPLAIN?
Past studies have revealed that only 88% of booked passengers actually arrive for flight.) Determine probability that if airline books 17 persons, not adequate seats will be available.
A new group comes along and that only has 5 people. Their weights are also measured initially and after 9 weeks. What would be the most accurate methodology for determining the percentage of weight loss for this new group?
Assuming that the manager's claim is correct, calculate the probability that 117 or fewer of 205 randomly selected marketing researchers would disapprove of the scenario.
Comparison of Fathers Mean Psychological States in the Job and Home Spheres - Descriptive Statistics and Mean-Level Comparisons
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