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1. A noted psychic was tested for ESP. The psychic was presented with 200 cards face down and was asked to determine if the card was one of 5 symbols: a star, cross, circle, square, or three wavy lines. The psychic was correct in 49 cases. Let p represent the probability that the psychic correctly identifies the symbol on the card in a random trial. Assume the 200 trials can be treated as an SRS from the population of all guesses.
To see if there is evidence that the psychic is doing better than just guessing, we test
H0:p=.2Ha:p>.2
(a) What is the z-statistic for this test?
(b) What is the P-value of the test?
2. A survey of 1305 people who took trips revealed that 96 of them included a visit to a theme park. Based on those survey results, a management consultant claims that less than 8 % of trips include a theme park visit. Test this claim using the ?=0.01significance level.
(a) The test statistic is:
(b) The P-value is:
Both SAT and ACT scores are normally distributed. What is the probability that a randomly selected high school senior's score on the mathematics part of the SAT will be more than 630?
The password of 52 digit sequence is made. It consists of 0 and 1. How various different possibilities exist for networks password.
question 1 the following data are results from a study you recently completed. calculate the correlation coefficient
He is equally likely to select any. Billy leaves last and takes the one remaining hat. Let x be the number of cowboys who end up with the correct hat.
When a 99% confidence interval is calculated instead of a 90% confidence interval with n being the same, the margin of error will be
To speed up the process in a blood testing procedure, blood samples from 3 people are combined into one mixture. The mixture will on test negative if all individual samples are negative. If the probability than an individual sample tests positive ..
The average credit card debt for college seniors is $3,262. If the debt is normally distributed with a standard deviation of $400, find probabilities. that the senior owes at least $1,000
an internet server conducted a survey of 400 of its customers and found that the average amount of time spent online
In a particular region of Rhode Island, it is known that fisherman's trap on average of 32 pounds of lobster per day with a standard deviation of four pounds.
With a standard deviation of 0.5. At a .05 significance level, can we conclude college students watch fewer videos per month than high school students?"
What are confounds? Give an example of a design that has three confounds. Describe three ways to alter the design to address these confounds and explain the advantages and disadvantages of each.
question in 2000 27.7 of incoming freshmen characterized their political views as liberal 51.9 as moderate and 20.4 as
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