###### Elementary Statistics: A Step By Step Approach

278 SOLVED PROBLEMS

Question: 13.8

## Determine the number of runs and the values of n1 and n2 in each sequence. a. M M F F F M F F b. H T H H H c. A B A A A B B A B B B ...

a. There are four runs, as shown. \underbra...
Question: 12.3

## Use the Scheffé test to test each pair of means in Example 12–1 to see if a significant difference exists between each pair of means. Use 𝛼 = 0.05. ...

The $F$ critical value for Example 12...
Question: 12.5

## Gasoline Consumption A researcher wishes to see whether the type of gasoline used and the type of automobile driven have any effect on gasoline consumption. Two types of gasoline, regular and highoctane, will be used, and two types of automobiles, two-wheel- and all-wheel-drive, will be used in ...

Step 1 State the hypotheses. The hypotheses for th...
Question: 11.7

## Happiness and Income A psychologist randomly selected 100 people from each of four income groups and asked them if they were “very happy.” For people who made less than $30,000, 24% responded yes. For people who made$30,000 to $74,999, 33% responded yes. For people who made$75,000 to $90,999, 38% ... ## Verified Answer: It is necessary to make a table showing the number... Question: 12.2 ## Tall Buildings A researcher wishes to see if there is a difference in the number of stories in the tall buildings of Chicago, Houston, and New York City. The researcher randomly selects five buildings in each city and records the number of stories in each building. The data are shown. At 𝛼 = 0.05, ... ## Verified Answer: Step 1 State the hypotheses and identify the claim... Question: 14.8 ## Selecting a Monetary Bill A box contains five$1 bills, three $5 bills, and two$10 bills. A person selects a bill at random. What is the expected value of the bill? Perform the experiment 25 times. ...

Step 1 List all possible outcomes. They are [latex...
Question: 14.7

## Selecting a Key A person selects a key at random from four keys to open a lock. Only one key opens the lock. If the first key does not open the lock, she tries other keys until one opens the lock. Find the average of the number of keys a person will have to try to open the lock. Try the experiment ...

Step 1 List all possible outcomes of the experimen...
Question: 14.6

## Rolling a Die A die is rolled until a 6 appears. Using simulation, find the average number of rolls needed to obtain a 6. Try the experiment 20 times. ...

Step 1 List all possible outcomes. They are 1, 2, ...
Question: 14.5

## Outcomes of a Tennis Game Using random numbers, simulate the outcomes of a tennis game between Bennett and Aiden, with the additional condition that Bennett is twice as good as Aiden. ...

Now $20 \%$ is \frac{20}{100}=...