Statistics question and answers for September 23, 2023
- Q Sick computers: Let V be the event that a computer contains a virus, and let W be the event that a computer contains a worm. SupposeP(V)=0.31, P (W)=0.4, P (V...
- Q Visit your local library: On a recent Saturday, a total of 1231 people visited a local library. Of these people, 253 were under age 10, 468 were aged 10-18,158 were...
- Q Paving stones: 150 paving stones were examined for cracks, and 9 were found to be cracked. The same 150 stones were examined for discoloration, and 23 were found to be...
- Q Of the 62 students enrolled in a statistics class last semester, 35 worked during the semester and 33 received a high grade.Report answers accurate to 4 decimal places.If two students...
- Q An enthusiastic shopper is considering 3 products (A, B, and C) that could potentially go on sale soon. The probability that product A will go on sale is 0.9 while...
- Q More pitching: A baseball pitcher threw 3219 pitches during part of a recent season. Of these, 1914 were thrown with no strikes on the batter, 941 were thrown with one...
- Q Pay Your bills: A company audit showed that of 735 bills that were sent out, 482 were paid on time,153 were paid up to 30 days late, 55 were paid...
- Q How are your grades? In a recent semester at a local university, 500 students enrolled in both Statistics I and Psychology I. Of these students, 85 got an A in...
- Q More pitching: A baseball pitcher threw 3365 pitches during part of a recent season. Of these, 1836 were thrown with no strikes on the batter, 906 were thrown with one...
- Q Based on tests of the Chevrolet Cobalt, engineers have found that the miles per gallon in highway driving are normally distributed, with a mean of 32 mpg and a standard...
- Q Cards are selected randomly from the set of 10 cards shown below.1224535780Use terms from the list below to complete the sentences.probabilityoutcomeequally likely1. Selecting a card with an even number is...
- Q take one of these pieces of clothing out In Bill the Boring's dryer there are 18 black shirts, 5 gray shirts, 11 black sweaters, and 7 gray sweaters. Bill is...
- Q A box has 15 candies in it: 4 are butterscotch, 3 are peppermint, and 8 are taffy. (Each candy falls into only one of these categories.) Elsa wants to select...
- Q A fish story: The mean length of one-year-old spotted flounder, in millimeters, is 133 with a standard deviation of 19, and the mean length of two-year-old spotted flounder is 168...
- Q In a survey of 777 homeowners with high-speed Internet, the average monthly cost of a high-speed Internet plan was $64.88 with standard deviation $11.14. Assume the plan costs to be...
- Q A binomial experiment consists of 18 trials. The probability of success on trial 11 is 0.41.What is the probability of success on trial 15?0.410.640.720.520.860.3
- Q Lunch break: In a recent survey of 655 working Americans ages 25-34, the average weekly amount spent on lunch was $43.99 with standard deviation $2.65. The weekly amounts are approximately...
- Q Internet providers: In a survey of 805 homeowners with high-speed Internet, the average monthly cost of a high-speed Internet plan was $71.98 with standard deviation $12.66. Assume the plan costs...
- Q In a hybrid corn research project, 200 seeds were planted, and 110 of them germinated. Find the empirical probability that any particular seed of this type will germinate.The empirical probability...
- Q Internet providers: In a survey of 831 homeowners with high-speed Internet, the average monthly cost of a high-speed Internet plan was $55.82 with standard deviation $11.82. Assume the plan costs...
- Q In a study, 61 people were given 25 dollars and told to place bets on a coin flip which they were told was biased. The coin would flip heads 60%...
- Q Volunteering: The General Social Survey asked 1298 people whether they performed any volunteer work during the past year. A total of 529 people said they did.(a) Find a point estimate...
- Q Contaminated water: In a sample of 43 water specimens taken from a construction site, 27 contained detectable levels of lead.(a) Construct a 99.8% confidence interval for the proportion of water...
- Q Conceptually, the independent samples t test equation assesses the ratio of the actual difference between two sample means relative to standard error--namely, how much difference should exist, on average, between...
- Q A researcher expects that a newly developed shoe used by a sample of n = 6 individuals will reduce running speeds compared to a sample of n = 11 individuals...
- Q Although t tests are affected by sample size, sample size does not influence measures of effect size, such as Cohen's dTrueFalse
- Q Lacy draws a heart from a standard deck of 52 cards. Without replacing the first card, she then proceeds to draw a second card and gets a diamond. Are these...
- Q An American roulette wheel has 38 slots: 18 red, 18 black, and 2 green.What are the odds for the ball landing in a green slot?toWhat are the odds aganst the...
- Q If the odds for a certain event are 7 to 5, what is the probability of the event occurring? Write your answer as a simplified fraction.
- Q The probability that event A will occur is P(A) = 0.42.What is the probability (in decimal form) that event A will not occur? P(A) =What are the odds for event...
- Q Suppose the probability of an event is 40/41What are the odds for the event happening?toWhat are the odds against the event happening?to
- Q In Alex's drawer she has 9 pairs of socks, 7 of which are white, and 12 tee shirts, 4 of which are white.The probability of choosing a white pair of...
- Q Bailey borrowed $4000 at prime plus 1.5% on January 5th of a non-leap year. The loan requires fixed monthly payments of $1000 on the first day of each month. The...
- Q If the odds against a certain event are 15 to 8, what is the probability of the event occuring? Write your answer as a simplified fraction.
- Q The letters in the word ARIZONA are scrambled.Write your answers in decimal form. Round to the nearest thousandth as needed.What is the probability that the first letter is A?What is...
- Q Melissa a number cube 1000 times and got the following results.Outcome Rolled 1 2 3 4 5 6Number of Rolls...
- Q According to a survey, 61% of murders committed last year were cleared by arrest or exceptional means. Fifty murders committed last year are randomly selected, and the number cleared by...
- Q A scout leader is going to pair a new member with one of the existing 15 troop members. Five of the boys love to go camping, ten like to fish,...
- Q A bag of M&M's has 5 red, 4 green, 8 blue, and 3 yellow M&M's. What is the probability of randomly picking: (give answer as a reduced fraction)1) a yellow?2)...
- Q Roller coaster ride: A roller coaster is being designed that will accommodate 60 riders. The maximum weight the coaster can hold safely is 12,000 pounds. According to the National Health...
- Q An experiment done in such a way that neither the subjects nor the researchers know which subjects are in the treatments group and which are in the control group is...
- Q A study found that college students who live off-campus are significantly more likely to drink alcohol than those who live on-campus. Which of the following conclusions is correct? There seems...
- Q To determine the effectiveness of a new pain reliever, a randomly chosen group of pain sufferers is assigned to take the new drug, and another randomly chosen group is assigned...
- Q A die is rolled. Find the probability of the given event.Write your answers as whole numbers or reduced fractions.(a) The number showing is a 4P(4) =(b) The number showing is...
- Q A ball is drawn randomly from a jar that contains 8 red balls, 4 white balls, and 6 yellow balls. Find the probability of the given event. Write your answers...
- Q A jar contains 8 red marbles numbered 1 to 8, 10 blue marbles numbered 1 to 10, and 4 white marbles numbered 1 to 4. A marble is drawn at...
- Q If the probability of an event is 33/59 what is the probability of the event not happening?Write your answer as a simplified fraction.
- Q If the probability of an event not happening is 36/43 what is the probability of the event happening?Write your answer as a simplified fraction.
- Q Data on pulse rates was collected from a random sample of 100 students from ETSU.We find a 95% confidence interval for mean pulse rate to be (65, 72). Which of...
- Q A researcher investigating whether people who got a COVID-19 vaccination are lesslikely to get COVID than people who didn't get the vaccine found a P-value of 3%.This means that3% of...
- Q A friend of yours claims that they are a 75% free-throw shooter in basketball. Youdon't think she is that good and want to test her to gather evidence that she...
- Q The most important condition for sound conclusions from statistical inference isusually thatthe population distribution is exactly Normal.O the data contain no outliers.the sample size is as large as possible.the standard...
- Q A 2019 study collected by eMarketer asked 800 US smartphone users whether theyhad used a food delivery app at least once in the last month. The survey also askedwhich food...
- Q Thirty small communities in Connecticut (population near 10,000 each) gave an average of x= 139.4 reported cases of larceny per year. Assume that o is known to be 42.7 cases...
- Q The alpha level is a probability value that defines the sample means that will be classified as very unlikely in ahypothesis test.TrueFalse
- Q Elevator ride: Engineers are designing a large elevator that will accommodate 47 people. The maximum weight the elevator canhold safely is 9165 pounds. According to the National Health Statistics Reports,...
- Q High-rent district: The mean monthly rent for a one-bedroom apartment without a doorman in Manhattan is $2676. Assume thestandard deviation is $509. A real estate firm samples 108 apartments. Use...
- Q A sample of size 31 will be drawn from a population with mean 39 and standard deviation 9. Use the TI-84 Plus calculator.(a) Is it appropriate to use the normal...
- Q SAT scores: Assume that in a given year the mean mathematics SAT score was 522, and the standard deviation was 116. Asample of 66 scores is chosen. Use the TI-84...
- Q Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum to increase funding foreducation is on the ballot...
- Q A binomial probability experiment is conducted with the given parameters. Use technology to find the probability of x successes in the n independent trials of the experiment.n=6, p=0.3, x<4P(X<4)=(Round to...
- Q A poll reported that 61% of adults were satisfied with the job the major airlines were doing. Suppose 20 adults are selected at random and the number who are satisfied...
- Q According to an almanac, 70% of adult smokers started smoking before turning 18 years old.(a) If 200 adult smokers are randomly selected, how many would we expect to have started...
- Q News reports indicate that nationally, 45% of Americans are planning"staycations" at home this year instead of a vacation trip. Suppose we take arandom sample of 200 people in our city...
- Q Determine whether the following probability experiment represents a binomial experiment and explain the reason for your answer. An experimental drug is administered to 110 randomly selected individuals, with the number...
- Q In a certain game of chance, a wheel consists of 46 slots numbered 00, 0, 1, 2,..., 44. To play the game, a metal ball is spun around the wheel...
- Q A given distribution has a population mean, ?, of 124 and a population standard deviation, o, of 13. Compute the raw, x-value associated with a Z-score of 1.62.
- Q Suppose that a single card is selected from a standard 52-card deck. What is the probability that the card drawn is a club? Now suppose that a single card is...
- Q The probability that a randomly selected 4-year-old male feral cat will live to be 5 years old is 0.99301.(a) What is the probability that two randomly selected 4-year-old male feral...
- Q Due to a manufacturing error, five cans of regular soda were accidentally filled with diet soda and placed into a 18-pack. Suppose that two cans are randomly selected from the...
- Q According to a study done by a university student, the probability a randomly selected individual will not cover his or her mouth when sneezing is 0.267. Suppose you sit on...
- Q A bag of 31 tulip bulbs contains 11 red tulip bulbs, 12 yellow tulip bulbs, and 8 purple tulip bulbs. Suppose two tulip bulbs are randomly selected without replacement from...
- Q In a certain game of chance, a wheel consists of 38 slots numbered 00, 0, 1, 2,..., 36. To play the game, a metal ball is spun around the wheel...
- Q The probability that a randomly selected 3-year-old male feral cat will live to be 4 years old is 0.98533.(a) What is the probability that two randomly selected 3-year-old male feral...
- Q A bag of 100 tulip bulbs purchased from a nursery contains 40 red tulip bulbs, 40 yellow tulip bulbs, and 20 purple tulip bulbs.(a) What is the probability that a...
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