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Compute the linear correlation coefficient for the data below.
The probability that an individual has 20-20 vision is 0.17. In a class of 49 students, what is the probability of finding five people with 20-20 vision?
Ben claims that the average price of the car wash in West Newton is more than $6.00. A sample of five car washes has average price of $6.60 and standard deviation of $1.10. At alpha = 0.05, test Ben
A random sample of 100 adults was chosen. 80 adults in the sample said they were non-smokers. Develop a 95 percent confidence interval for the population proportion, p, of non-smokers.
Classify the data as either discrete or continuous. What kind of data is provided by statement "Helen finished in 10th place in the ice dancing competition"?
There are 42 chocolates in the box, all identically shaped. There 16 are filled with nuts, 12 with caramel, and 14 are solid chocolate. You randomly choose one piece, eat it, and then choose a secon
A game has 3 outcomes. The probability of win is 0.4, the probability of tie is 0.5, and probability of a loss is 0.1. Determine the probability of not winning in a single play of the game.
A sample size of 200 is taken at random from infinite population. Given that population proportion is 0.60, the probability that sample proportion is greater than 0.58 is:
In the testing the hypothesis H0: >100, the p-value is found to be 0.074 and sample mean is 105. Which of following statements is true?
A sample of 250 observations is chosen at random from as well as infinite population. given that the population proportion is .25, the standard error of the sampling distribution of the sample propo
For a two-tail test, the null hypothesis will be rejected at the 0.05 level of significance if the value of the standardized test statistic z is:
A soft-drink machine is regulated so that it discharges an average of 200 milliliters per cup. If the amount of drinks is normally distributed with a standard deviation equal to 15 milliliters,
Suppose that the lengths are normally distributed. A quality control specialist collects a random sample of 16 rods and finds the sample mean length to be 15 feet and a standard deviation of 0.64 fe
The United Nations wants to find out the percentage of females in the U.S. labor force.
Determine the probability she received 5 or more emails during the same period? (Round your answer to 4 decimal places.) Determine the probability she received three or less emails during the period?
A sample of 100 people who visit the bar is surveyed for their annual expenditures in bar. It is found that upon average each person who regularly visits the bar spends about $2000 for each year in
The amounts of money requested in home loan applications at Dawn River Federal Savings are approximately normally distributed with a mean of $70,000 and a standard deviation of $20,000. A loan appli
The internal auditing staff of local manufacturing company performs the sample audit each quarter to determine the proportion of accounts that are delinquent (more than 90 days overdue).
The internal auditing staff of a local manufacturing company performs a sample audit each quarter to estimate the proportion of accounts that are current (between 0 and 60 days after billing).
It is asserted that 80 percent of cars approaching an individual toll both in New Jersey are equipped with an E-ZPass transponder. Find the probability that in a sample of seven cars:
A company is interested in determining the mean number of days of sick leave taken by its employees. The firm's statistician randomly selects 100 personnel files and notes the number of sick days ta
In the given hour (on a Thursday), employ the Poisson model to find the probability that exactly 4 students would maket their way into the lab.
A scale measures the person's susceptibility to hypnosis on a scale from 0 to 12. A study reported a mean score of 4.59 and a standard deviation of 2.95
If two gloves are randomly chosen from box without replacement, what is the probability that both gloves selected will be right-handed? If two gloves are randomly selected from box without replacem
Testing for alzheimer's disease can be the long as well as expensive process, consisting of lengthy tests and medical diagnosis. recently, a group of reserachers devised a 7-minute test to serve as