In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours. A A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p. (b) Find the standard deviation of p. (c) Compute an approximation for P (P<0.84), which is the probability that fewer than 84% of the people in the sample pass the test. Round your answer to four decimal places. 0 X E D w

In a survey of 3066 adults aged 57 through 85 years, it was found that 82.3% of them used at least one prescription medication. Complete parts (a) through (c) below. a. How many of the 3066 subjects used at least one prescription medication? (Round to the nearest integer as needed.)

In a survey of 3428 adults aged 57 through 85 years, it was found that 87.6% of them used at least one prescription medication. Complete parts (a) through (c) below. ..... a. How many of the 3428 subjects used at least one prescription medication? (Round to the nearest integer as needed.)

To test a drug intended to increase memory, 80 subjects were randomly given a pill that either contained the drug or was a placebo. After ten minutes, the subjects were asked to look at a poster with pictures of 20 common objects for five minutes. After waiting ten minutes, the subjects were asked to list as many of the objects as they could recall. For the subjects that took the drug, 75% were able to list at least half of the objects. For the subjects that took the placebo, 70% were able to list at least half of the objects. Check that the conditions are met for a hypothesis test to compare the population proportion of subjects that took the drug that could list at least half of the objects to the proportion that took the placebo that could. Select the correct answer below: All of the conditions are met. The samples are not random samples of the populations. O The samples are not independent. Not all the values np. n₁q. nap, and nag are at least 5.

57% of all the town's residents own a dog and 66% own a cat. Of the dog owners 49% also own a cat. If a town resident is chosen at random find: (round to 4 decimal places where possible) a.  P(Own a Dog) =  b.  P(Own a Cat) =  c.  P(Own a Cat and a Dog) =  d.  P(Own a Dog GIVEN Own a Cat) =

In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours. A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of P. 0 (b) Find the standard deviation of p. 0 (c) Compute an approximation for P(P >0.84), which is the probability that more than 84% of the people in the sample pass the test. Round your answer to four decimal places. 0 X

How could you use a random-digit generator or random-number table to simulate rain if you knew that 30% of the time with conditions as you have today, it will rain? Choose the correct answer below. O A. Let the digit 3 represent "rain," and let any other digit represent "no rain." Generate random digits and record the results. O B. Let the digits 1, 2, and 3 represent "rain," and let the digits 4, 5, 6, 7, 8, 9, and 10 represent "no rain." Generate random digits and record the results. OC. A random-digit generator or random-number table cannot be used to simulate rain. O D. Let the digits 0, 1, and 2 represent "rain," and let the digits 3, 4, 5, 6, 7, 8, and 9 represent "no rain." Generate random digits and record the results.

a list of the over 2300 Henry Clay high School is compiled. from that list 250 names are randomly chosen and given a survey to complete. of those surveyed 72% said they intended to attend college after completing high school what would the 250 students surveyed would be an example of?

A polling company reported that 53% of 1013 surveyed adults said that secondhand smoke is "quite annoying." Complete parts (a) through (d) below. a. What is the exact value that is 53% of 1013? The exact value is (Type an integer or a decimal.) b. Could the result from part (a) be the actual number of adults who said that secondhand smoke is "quite annoying"? Why or why not? O A. Yes, the result from part (a) could be the actual number of adults who said that secondhand smoke is "quite annoying" because the results are statistically significant. B. No, the result from part (a) could not be the actual number of adults who said that secondhand smoke is "quite annoying" because that is a very rare opinion. O C. No, the result from part (a) could not be the actual number of adults who said that secondhand smoke is "quite annoying" because a count of people must result in a whole number. D. Yes, the result from part (a) could be the actual number of adults who said that secondhand smoke is…

An experiment investigated the effect of length and repetition of TV ads on students choosing to eat at Del Taco. All 60 students watched a 40-minute television program that included ads for Del Taco. Some students saw a 30-second commerical; others a 90-second commerical. The same commerical was shown either 1, 3, or 5 times during the program. After the viewing, each student was asked to rate their craving for Del Taco on a scale of 0 to 10. What are the subjects of this experiment?A. 60 studentsB. effect of length and repetion of TV adsC. 40-minute television programD. craving for Del Taco on a scale of 0 to 10E. 1, 3, or 5 commercials during the 40-minute television program