2. Assume that a study of 423 randomly selected school bus routes showed that 408 arrived...
2. Assume that a study of 423 randomly selected school bus routes showed that 408 arrived on time. Considering an event to be "unusual" if its probability is less than or equal to 0.05,is it "unusual" for a school bus to arrive late?
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2. Assume that a study of 423 randomly selected school bus
routes showed that 408 arrived...
A study of 1000 randomly selected flights of a major airlines showed that 849 of the...
A study of 1000 randomly selected flights of a major airlines showed that 849 of the flights arrived on time. What is the probability of a flight NOT arriving on time
Assume that 2000 births are randomly selected and exactly 1009of the births are girls. Use subjective...
Assume that 2000 births are randomly selected and exactly 1009of the births are girls. Use subjective judgment to determine whether the given outcome is unlikely, and also determine whether it is unusual in the sense that the result is far from what is typically expected. Determine whether exactly 1009 girls out of 2000 randomly selected births is unlikely. A. It is unlikely because the probability of this particular outcome is very small, considering all of the other possible outcomes. B.It...
Based on data from a car bumper sticker study, when a car is randomly selected, the...
Based on data from a car bumper sticker study, when a car is randomly selected, the number of bumper stickers and the corresponding probabilities are as shown below. x P(x) 0 0.800 1 0.088 2 0.045 3 0.017 4 0.014 5 0.012 6 0.009 7 0.007 8 0.006 9 0.002 A. Does the given information describe a probability distribution? B. Assuming that a probability distribution is described, find its mean and standard deviation. C. Use the range rule of thumb...
Provide an appropriate response. A physical fitness association is including the mile run in its secondary-school...
Provide an appropriate response. A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 40 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 348 seconds. *Please provide a sketch and show all work & calculations.
2. A study of Pennsylvania hospitals showed that the mean patient length of stay in 2001...
2. A study of Pennsylvania hospitals showed that the mean patient length of stay in 2001 was 4.87 days with a standard deviation of 0.97 days. Assume that the distribution of patient length of stay is normally distributed. Sketch an appropriate GRAPH for EACH PART and shade appropriately region. Round to 4 decimal places. (3 points each) a) Find the probability that a randomly selected patient has a length of stay of greater than 7days. b) What is the probability...
MyLê This Question: 1 pt Stude 2 of 12 (1 complete) This Quiz: 12 pts possible...
MyLê This Question: 1 pt Stude 2 of 12 (1 complete) This Quiz: 12 pts possible о му с Question Help Cours The lengths of a particular animal's pregnancies are approximately normally distributed, with mean y = 270 days and standard deviation o 8 days. (a) What proportion of pregnancies lasts more than 276 days? Assig (b) What proportion of pregnancies lasts between 268 and 274 days? (c) What is the probability that a randomly selected pregnancy lasts no more...
A poll of 2,142 randomly selected adults showed that 92% of them own cell phones. The...
A poll of 2,142 randomly selected adults showed that 92% of them own cell phones. The technology display below results from a test of the claim that 91% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05 significance level to complete parts (a) through (e). Test of p=0.91 vs p≠0.91 Sample X N Sample p 95% CI Z-Value P-Value 1 1970 2,142 0.919701 (0.908193,0.931210) 1.57 0.117 a. Is the...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The technology display below ret from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the bin distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p+0.92 Z-Value P-value Sample p 95% CI N Sample X 0.000 4.01 (0.930869,0.956847) 1 1967 2,084 0.943858 a....
Needs help with 9-15 ezpecially 9,11,13,15 3-2 Fundamentals criterion commonly used in inferential statistics, but the...
Needs help with 9-15 ezpecially 9,11,13,15
3-2 Fundamentals criterion commonly used in inferential statistics, but the value of 0.05 is not absolutely rigid, and other values such as 0.01 are sometimes used instead) 9. Probability of a Wrong Result Table 3.-1 shows that among 85 women who were pregnant, the test for pregnancy yielded the wrong conclusion 5 times. a. Based on the available results, find the probability of a wrong test conclusion for a woman who is pregnant b....
Among 450 randomly selected drivers in the 20-24 age bracket, 9 were in a car crash...
Among 450 randomly selected drivers in the 20-24 age bracket, 9 were in a car crash in the last year. If a driver in that age bracket is randomly selected, what is the approximate probability that he or she will be in a car crash during the next year? Is it unlikely for a driver in that age bracket to be involved in a car crash during a year? Is the resulting value high enough to be of concern to...
2. A study of Pennsylvania hospitals showed that the mean patient length of stay in 2001 was 4.87 days with a standard deviation of 0.97 days. Assume that the distribution of patient length of stay is normally distributed. Sketch an appropriate GRAPH for EACH PART and shade appropriately region. Round to 4 decimal places. (3 points each) a) Find the probability that a randomly selected patient has a length of stay of greater than 7days. b) What is the probability...
MyLê This Question: 1 pt Stude 2 of 12 (1 complete) This Quiz: 12 pts possible о му с Question Help Cours The lengths of a particular animal's pregnancies are approximately normally distributed, with mean y = 270 days and standard deviation o 8 days. (a) What proportion of pregnancies lasts more than 276 days? Assig (b) What proportion of pregnancies lasts between 268 and 274 days? (c) What is the probability that a randomly selected pregnancy lasts no more...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The technology display below ret from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the bin distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p+0.92 Z-Value P-value Sample p 95% CI N Sample X 0.000 4.01 (0.930869,0.956847) 1 1967 2,084 0.943858 a....
Needs help with 9-15 ezpecially 9,11,13,15
3-2 Fundamentals criterion commonly used in inferential statistics, but the value of 0.05 is not absolutely rigid, and other values such as 0.01 are sometimes used instead) 9. Probability of a Wrong Result Table 3.-1 shows that among 85 women who were pregnant, the test for pregnancy yielded the wrong conclusion 5 times. a. Based on the available results, find the probability of a wrong test conclusion for a woman who is pregnant b....
Among 450 randomly selected drivers in the 20-24 age bracket, 9 were in a car crash in the last year. If a driver in that age bracket is randomly selected, what is the approximate probability that he or she will be in a car crash during the next year? Is it unlikely for a driver in that age bracket to be involved in a car crash during a year? Is the resulting value high enough to be of concern to...
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