Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep. This condition results in lack of sleep and extreme fatigue during waking hours. A current estimate is that 15 million out of the 312.7 million Americans suffer from sleep apnea, or approximately 4.8%. A safety commission is concerned about the percentage of commercial truck drivers who suffer from sleep apnea. They do not have any reason to believe that it would be higher or lower than the population’s percentage. To test the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 4.8%, a simple random sample of 339 commercial truck drivers is examined by a medical expert, who concludes that 7 suffer from sleep apnea. Does this evidence support the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 4.8%? Use a 0.05 level of significance.   Step 3 of 3 :   Draw a conclusion and interpret the decision.     Answer Tables Keypad Keyboard Shortcuts      We reject the null hypothesis and conclude that there is insufficient evidence at a 0.05 level of significance that the percentage of commercial truck drivers who suffer from sleep apnea is not 4.8%.   We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.05 level of significance that the percentage of commercial truck drivers who suffer from sleep apnea is not 4.8%.    We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.05 level of significance that the percentage of commercial truck drivers who suffer from sleep apnea is not 4.8%.   We reject the null hypothesis and conclude that there is sufficient evidence at a 0.05 level of significance that the percentage of commercial truck drivers who suffer from sleep apnea is not 4.8%.

Over doses from opioids have captured the national spotlight. Rightly so - they kill nearly 30,000 Americas a year and cause more than 1 million hospitalizations. However, the misuse of over-the-counter pain medications (e.g. Tylenol, Advil, Aleve) can cause stomach bleeding, ulcers, liver disease and, in some cases, death. Approximately 80% of Americans use these medications to relieve headaches, backaches, sore muscles, and reduce fever but they are unaware of the dangers if the drugs are not used correctly. A random sample (n=101) of adults were given a questionnaire to ask the question "How often do you use pain medication in one day?". Using the output, histogram, box-whisker plot, and the QQ Plot attached - check the assumption of normality for this data. PainNormalitylnformationoutputhistbox 210317.pdf. 1. continuous 2. H-spread The assumption of normality was checked by comparing the and the median. 3. kurtosis 4. left This suggests that the distribution is slightly skewed. 5.…

Statistical studies have repeatedly shown that about 85% of all bicyclists where helmets. Further studies reveal that about 80% of those wearing helmets do not have head injuries. We do not have any data as to whether those who wear helmets are more safety conscious and therefore have fewer accidents. We do know that about 20% of those who do not wear helmets also experience no head injuries. That’s all the data we have. Mr. X was in a bicycle accident and suffered a head injury. (we do not know anything else, so do not try to factor in all sorts of possible scenarios). Given the above information what is the probability that Mr. X was wearing a helmet? H = Mr. X was wearing a helmetE =  head injury The prior, p(H) = .85  Why? What does that figure represent?What is p(~H)?What is p(E|H)?What is p(E|~H)? Using Bayes’s formula what is the p(H|E)?(display the formula), and..Explain which way the final probability (the posterior) was revised…up or down. Why?

while estimates vary, one website indicated that approximately 44% of US citizens have type O blood. A statistics class tested this claim by having students identify their blood types. In a sample of 64 students, 26 indicated their blood type to be type O. At a=.01, test that the percentage of US citizens with type O blood is less than 44%. The hypotheses for this situation are:

A researcher wants to determine the percentage of American teenagers who send or receive text messages while doing homework. Which of the following techniques would likely be the MOST efficient way of obtaining an accurate estimate for this percentage? 1. Randomly select teenagers from the list of all teenage students in every state in America and mail surveys to those teens, asking them if they send or receive text messages while doing homework. 2. Send a survey to every teenager in America and ask them if they send or receive text messages while doing homework. 3. Randomly select teenagers from the list of all teenage students in one state and mail surveys to those teens, asking them if they send or receive text messages while doing homework.

Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep. This condition results in lack of sleep and extreme fatigue during waking hours. A current estimate is that 11.911.9 million out of the 312.7312.7 million Americans suffer from sleep apnea, or approximately 3.8%3.8%. A safety commission is concerned about the percentage of commercial truck drivers who suffer from sleep apnea. They do not have any reason to believe that it would be higher or lower than the population’s percentage. To test the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 3.8%3.8%, a simple random sample of 347347 commercial truck drivers is examined by a medical expert, who concludes that 66 suffer from sleep apnea. Does this evidence support the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 3.8%3.8%? Use a 0.020.02 level of significance.   Step 3 of 4 :   Find the p-value. Round…

Color blindness, or dyschromatopsia, is a form of genetic deficiency in color perception. The condition is much more prevalent among males than females, pointing to a genetic connection with the X chromosome. The frequency of dyschromatopsia in the Caucasian American male population is about 7%. However, it is thought that this proportion might be smaller among males of other ethnicities. We want to estimate the proportion of Asian American males who are color-blind. How large a sample size do we need in order to obtain a 95% confidence interval with a margin of error no greater than 5%, or 0.05? Use 0.5 for p̂.

An article claims that 70% of adults over 50 take vitamin supplements. To test this claim, you take a sample and do your math. Based on your results, you end up rejecting the claim. Later it turns out that the claim was in fact correct. What type of error did you make, if any? No error was made. A type II error A type I error

Based on a survey, more than  1  in  4  American children have cholesterol levels of  180  milligrams or higher.

In a 2018 Poll 447 out of 486 supported universal background checks for all gun sales in the U.S. In a similar poll from 2015, 276 of 321 interviewed supported universal background checks. Is this significant evidence that the percent of the population that supports universal background checks in the U.S. has decreased during this time?