According to a recent​ study, 80% of adults say they play games on their smartphone. Suppose we randomly select 200 adults and find that​ 68% of the sample plays games on their smartphone. Which of the following correctly describes the distribution for the proportion of adults in the sample who play games on their​ smartphone?   A. ​pˆ ~​ AN(0.68, 0.0330)   B. ​pˆ ~​ AN(0.80, 0.0283)   C. ​pˆ ~​ AN(0.80, 0.0330)   D. X​ ~ AN(160,​ 5.6569)

A Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Seventeen people answered that they generally sell three cars; nineteen generally sell four cars; eleven generally sell five cars; nine generally sell six cars; nine generally sell seven cars. a. Complete the table. Enter the exact answers (i.e. enter your answers for the relative and cumulative relative frequencies as fractions, not as decimals). Data Value (# cars) Number 3 4 5 6 7 Table 2.42 Frequency Relative Frequency Cumulative Relative Frequency Number Number Number Number Number Number Number Number Number Number b. What does the frequency column in Table 2.42 sum to? c. What does the relative frequency column in Table 2.42 sum to? Number Number Number Number Number

A particular standardized test has scores that have a mound-shaped distribution with mean equal to 126  and standard deviation equal to  22 . Tom had a raw score of 161, Dick scored at the 98th percentile, and Harry had a z score of 2.00.  Arrange these three students in order of their scores from lowest to highest.   ▼(Choose one) ,  ▼(Choose one) ,  ▼(Choose one)

A drug company claims that an allergy medication causes headaches in 5% of those who take it.A medical researcher believes that more than 5% of those who take the drug actually get headaches.   Identify the population(s): All individuals who take the medication. The proportion of those who take the drug who get a headache. What is the variable being examined for individuals in the population(s)? Whether or not an individual who does not take the drug gets a headache. Whether or not an individual takes the correct dosage of the drug. Whether or not an individual who takes the drug gets a headache. Is it categorical or quantitative? [Proportions are Categorical. Mean values are Quantitative.] Categorical Quantitative Identify the parameter(s): The proportion of those who take the drug who get a headache. The mean amount of medication taken. The number individuals who take the medication. What kind of hypotheisis test is this? 1 population mean 2 population means 2…