Blog

The following data set represents the age of a random sample of cars on the road today.13371012The standard deviation of this sample is ________.

A random sample of computer users were asked which browser they primarily relied on for surfing the Internet and whether this browser was installed on a desktop or laptop computer. The following contingency table shows these results.BrowserDesktopLaptopInternet Explorer1856Firefox737Chrome2477Safari318Other37The probability that a randomly selected person from this sample used the Safari browser or used a laptop computer is ________.

The probability of a Type II error is denoted as _______.

There are 23 golfers participating in a weekend tournament. Prizes are awarded to the first, second, third, and fourth place finishers. The number of different ways these four places can be filled by those playing over the weekend is ________.

A survey of adults who typically work full-time from home recorded their current education levels. The results are shown in the table below.Education LevelFrequencyBachelor’s degree or higher37Some college13High school diploma only7Less than high school diploma3The probability that a randomly selected adult who works from home has less than a high school diploma is ________.

The following data represents the number of Sony TVs sold per day at a particular Costco over a random sample of five business days. 9 2 7 7 5 The standard deviation of this sample is ________.

The following table shows the frequency distribution of the credit scores for a random sample of homeowners who recently refinanced their mortgage at Delaware Bank.Credit ScoreFrequency700 to under 7207720 to under 74014740 to under 76025760 to under 78016780 to under 8008The probability that a randomly homeowner has a credit score of 720 to under 740 is ________.

Costco sells a matching set of T-shirts and shorts. The T-shirt comes in four colors and six sizes. The shorts come in three colors and five sizes. The number of unique color and size combinations of T-shirts and shorts is ________.

The following contingency table shows the number of two-bedroom apartments grouped by monthly rent and location.Monthly RentYorkLancasterDover$600 to under $700 6147$700 to under $800 231720$800 to under $900 101612The probability that a randomly selected apartment from this group has a monthly rental from $800 to under $900 or is located in York is ________.

The following data represents the number of home runs that Ryan Howard, a Major League Baseball player for the Philadelphia Phillies, hit over a six-year period.225847484531The mode for this data set is ________.