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A multiple choice test allows answers of a, b, c, d, e for each question. A student answers ten questions by making random guesses.
If both dice show the same number, take the score to be 0. Let the random variable X be your score on one roll of the dice.(a) What is the probability distribution function for X?
From a given population, it is known that 68% are female, 20% are smokers, and 16% are females who smoke. Determine the probability that a randomly selected person from this population will be femal
Assume you have n messages to send sequentially. The times between transmissions of 2 successive messages are iid exponential with rate λ. When a message is sent it takes an exponential time
Is there a statistically significant difference in BMI between male and female patients with COPD? Assume that BMI is normally distributed and use the 5% level of significance. Assume that the varia
Use rejection region approach and a level of significance =0.10 to test the proper hypothesis. Find the appropriate p-value for this hypothesis
The World Series of baseball is to be played through team A and team B. The first team to win 4 games wins the series (out of 7 total games). Assume the probability that team A wins a given game is
What is the probability that the sample proportion will be within >.03 of the population proportion? What is the probability that the sample proportion will be within >.05 of the population prop
Find conditional density function f(x|E) for the experiment of a number selected at random from the interval [0,1], given E, where E is the event that x > 4.
The 1-Mile Run is a common test for assessing physical fitness. Among college males the 1-Mile Run time is normally distributed with a mean of 411 seconds and standard deviation of 63 seconds.
Frequent checks of the unfilled orders at the end of the day reveal that the distribution of the unfilled orders follows a Poisson distribution with a mean of 2.6 orders.
If the data for chi-square test for independence form 2x2 matrix, then the value obtained for chi-square statistic will be affected by the sample size but the value for the phi-coefficient will not.
A fair die is tossed once. Explain the sample space. Find the probability of each outcome.
A researcher obtains the value of -8.50 for chi-square statistic. What can you conclude because the value is negative? Please describe your response. The observed frequencies are consistently larger
A researcher is determining the relationship between color preferences and gender. A sample of 40 men and 60 women is obtained and each person is asked to determine his/her preference between two ch
Which of the following best states the observed frequencies for a chi-square test? Explain your response.
Which of the following best states the expected frequencies for a chi-square test?
If each step is random and independent of preceding steps, and the person takes 10000 steps in total, determine the normal approximation to the probability of ending up more than 100 steps to the le
Find out the probability that the bank returns the checks and marks it "insufficient funds". If the bank returns the checks and marks it "insufficient funds", determine the probability that it is wri
In contrast, 98% of checks written by persons not wearing sunglasses clear the bank. She estimates that 10% of here customers wear sunglasses. Find the probability that the bank returns the checks a
A Poker player is dealt a 7 of diamonds, a queen ofdiamonds, a queen of hearts, a queen of clubs, and an ace ofhearts. He discards the 7. What is his probability of drawing to either a full house or
Industry standards suggest that 9 percent of new vehicles need warranty service in the first year. Jones Nissan in Sumter, South Carolina, sold 12 Nissans yesterday. (Round your Mean answer to 2 dec
A researcher is interested in comparing tastiness of different kinds of cheese in grilled cheese sandwiches. The researcher expects that Cheddar cheese grilled sandwiches are rated tastier than Swis
A researcher is interested in comparing the Christian maturity level of students who volunteer for community service versus those who do not. The researcher assumes that those who perform community
You notice at the gym that it appears more women tend to work out together, while more men tend to work out alone. To estimate whether this difference is significant, you gather data on the workout