Statistics question and answers for September 26, 2023
- Q A multiple-choice test consists of 10 questions. Each question has answer choices of a, b, c, and d, and only one of the choices is correct. If a student randomly...
- Q You do a 2-sample hypothesis test where you check a person's weight before starting a diet, and then again after they finish the diet. What kind of samples do you...
- Q A dog allergy test for people has a 97.5% accuracy rate. Only 2% of the population has an allergy to dogs (actually it is much smaller than that!). Hint: Use...
- Q A major ride-sharing company in Chicago has computed its mean fare from O'Hare Airport to the Drake Hotel to be $25.03 with a standard deviation of $3.41. Based on this...
- Q Fill in the P(X=x) values to give a legitimate probability distribution for the discrete random variable X, whose possible values are 0, 3, 4, 5, and 6.Value x of X...
- Q The workers' union at a particular university is quite strong. About 94% of all workers employed by the university belong to the workers' union. Recently, the workers went on strike,...
- Q A multiple-choice test consists of 8 questions. Each question has answer choices of a, b, c, d, and e, and only one of the choices is correct. If a student...
- Q A rainstorm in Portland, Oregon, has wiped out the electricity in about 10% of the households in the city. A management team in Portland has a big meeting tomorrow, and...
- Q An number cube (a fair die) is rolled 3 times. For each roll, we are interested in whether the roll comes up even or odd. An outcome is represented by...
- Q The WHO published a study indicating that the global healthy life expectancy has increased by 9.3% from 2000 to 2019. In 2000, the global healthy life expectancy was 58.3 years....
- Q Ace Pet Store(Varieties of Rats In Stock) Short-hair Long-hair TotalMale 65...
- Q A dog allergy test for people has a 98% accuracy rate. Only 1% of the population has an allergy to dogs (actually it is much smaller than that!). Use a...
- Q The average woman's height is 65 inches with a standard deviation of 3.5 inches.a.) Determine the Z-score of a woman who is 70 inches tall. b.) Use a z-score table...
- Q An ordinary (fair) coin is tossed 3 times. Outcomes are thus triples of "heads" (h) and "tails" (t) which we write hth, ttt, etc.For each outcome, let N be the...
- Q Fill in the P(X= x) values to give a legitimate probability distribution for the discrete random variable X, whose possible values are 2, 3, 4, 5, and 6. ...
- Q Roughly 1% of the population will have an allergic reaction to a certain type of bee sting. The table below shows the predicted testing outcome for a test that is...
- Q Your friend weighs 83 kg. How many pounds is this?Round your answer to the nearest tenth of a pound. Do not include units with your answer.
- Q Let X be a random variable with the following probability distribution.Value x of X P(X=x) no 10 0.25 ...
- Q Your friend Jeanie Alahgee has researched her family tree and finds that a large number of her family members have either red hair or blond air and either green eyes...
- Q Consider the following table: Female Male TotalRepublican 105 ...
- Q Anita's, a fast-food chain specializing in hot dogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant (as opposed to ordering...
- Q Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of c so that the following is true. P(c ? Z ?0.83)...
- Q Directions: Answer each question to the best of your ability. Show your work. No points will be given for answers only. You can use your calculator and pen/pencil.1. The following...
- Q A number from 1-72 is chosen at random. Find each probability as a fraction (in simplest form). decimal, and percent.Round the decimal to the nearest thousandth.P(factor of 72 and even)...
- Q Thirty-nine percent of U.S. adults think that the government should help fight childhood obesity. You randomly select six U.S. adults. Find the probability that the number of U.S. adults who...
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