A four-sided die is rolled repeatedly, until the first time (if ever) that an even number is obtained. What is the sample space for this experiment?
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4. A four-sided die is rolled repeatedly, until the first time (if ever) that an even number is obtained.
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- 18 Records of a credit card company show that 30% of its cardholders over age 50 dispute one or more charges on their statements during the year. is selected. Assuming the records are correct, find the probability that: A random sample of 10 cardholders over age 50I. There are 8 different fruity flavors in Brach's Sweet and Sour Variety Mix. The manufacturer says that a package contains about 280 pieces. You bought a bag to give out for Halloween. a) Your favorite flavor is LemonHead – how many LemonHead pieces do you expect to find in this bag? b) If it turns out that there 40 LemonHeads in the bag do you think the difference between what occurred and what you would expect by chance is statistically significant? Explain. c) If it turns out that there are 70 LemonHeads in the bag do you the difference between what occurred and what you would expect by chance is statistically significant? Explain.A fair coin is flipped, and a six-sided fair die is thrown at the same time. Give the sample space for the experiment above. What is the probability of getting a 3 on the die if a tail showed up on the coin?
- 10. A friend told you that she thinks that eating fruit prevents the spread of the coronavirus, because he knew a family where everyone caught the virus except for the daughter who ate fruit every day. This would be an example of: A designed experiment An anecdote A stratified sample An observational study1. A lawn mower company will produce 1,500 lawn mowers by 2020. In an effort to determine how much maintenance free consumers will take when they already buy lawn mowers, the company decided to conduct a study over the past 1 year of these mowers. . First, a random sample was taken by contacting 200 grass mowers. The company owner provides an 800 number and is asked to contact the company when the first repair is needed for the lawn mower. Owners who no longer use lawn mowers to cut their grass are either disqualified or not sampled. After 1 year, it turned out that 187 owners had reported for the first repair. However, the other 50 disqualified themselves. The average number per year until the first improvement was 5.3 times for samples deemed feasible. It is believed that the standard deviation is 1.28 per year. If the company wants to advertise the lawnmower and with a confidence level of 95%, what is the estimated annual mean value of repair-free lawn mower for this lawn mower?…1. Trixy is doing her experiment for her project. The experiment consists of counting the number of times that it rains and recording in inches the total rainfall next August in Boston, Massachusetts. Is this a random experiment? If so, find the sample space.
- is described below. NOTE: If the method is experimental, indicate if it is a true experiment or quasi experiment. 1. I get 30 people and use random assignment to divide the people into two groups. One group reads an article about the statistics of injuries and deaths caused by people using smart phones while driving, the other group watches a short video about a person who killed someone while using their smart phone. Both groups are then monitored to see if either of these made a difference in how often these people use their smart phones use while behind the wheel. What method would that study be? 2. What method asks a series of questions that are all planned in advance?A three dice is a six sided dice with only the numbers 1,2 and 3 . The usual numbers 4,5 and 6 are replaced by 1,2 and 3 respectively . 4 three-dice (with sides labeled 1,2 and 3) are rolled and the numbers face up on the 4 dice recorded . Give the sample space for this experiment . What is the probability that at least one of the dice rolled is showing a 2? What is the probability that at least one of the dice rolled is showing at 3 ?A coin is flipped once. If the result is a heads, the coin is flipped 2 more times, and the result (heads or tails) of each successive flip is noted. If the result is a tails, the coin is flipped 3 more times and the result of each successive flip is noted. How many possible outcomes are in the sample space of this experiment?
