The first vending machine that William Kine, Inc., assembled took 80 labor-hours. Estimate how long the fourth machine will require for each of the following learning rates:

$$95 \%$$

When Dave Carroll posted his video on YouTube, it went viral. What American value do you feel motivated consumers to pass along this "video complaint" to others?

In operant conditioning, the term s_____________ g___________ refers to the tendency for a response to be released in the presence of stimuli that are similar to the original . The opposite process, called s_ d_____________refers to the tendency for the response to be emitted more in the presence of one stimulus than another.

Refer to the accompanying table, which describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children.

$$\begin{matrix} \text{Number of Girls x} & \text{P(x)}\\ \text{0} & \text{0.004}\\ \text{1} & \text{0.031}\\ \text{2} & \text{0.109}\\ \text{3} & \text{0.219}\\ \text{4} & \text{0.273}\\ \text{5} & \text{0.219}\\ \text{6} & \text{0.109}\\ \text{7} & \text{0.031}\\ \text{8} & \text{0.004}\\ \end{matrix}$$

			Find the mean and standard

deviation for the numbers of girls in 8 births.

A clinical test on humans of a new drug is normally done in three phases. Phase I is conducted with a relatively small number of healthy volunteers. For example, a phase I test of bexarotene involved only 14 subjects. Assume that we want to treat 14 healthy humans with this new drug and we have 16 suitable volunteers available. If 14 subjects are selected from the 16 that are available, and the 14 selected subjects are all treated at the same time, how many different treatment groups are possible?

Biologists conducted experiments to determine whether a deficiency of carbon dioxide in the soil affects the phenotypes of peas. Listed below are the phenotype codes, where 1 = smooth-yellow, 2 = smooth-green, 3 = wrinkled yellow, and 4 = wrinkled-green.

Can the measures of variation be obtained for these values?

Do the results make sense?

$$2\quad 1\quad 1\quad 1\quad 1\quad 1\quad 1\quad 4\quad 1\quad 2\quad 2\quad 1\quad 2\quad 3\quad 3\quad 2\quad 3\quad 1\quad 3\quad 1\quad 3\quad 1\quad 3\quad 2\quad 2$$

Based on a poll conducted through thee-edition of USA Today, 67% of Internet users are more careful about personal information when using a public Wi-Fi hotspot. What is the probabili ty that among four randomly selected Internet users, at least one is more careful about personal information when using a public Wi-Fi hotspot? How is the result affected by the additional information that the survey subjects volunteered to respond?

A classic counting problem is to determine the number of different ways that the letters of "SQUARE" can be arranged.

(a) In counting combinations, order matters. (b) In counting permutations, order matters. (c) For a set of n distinct objects, the number of different combinations of these object is more than the number of different permutations. (d) If we have a set with five distinct objects, then the number of different ways of choosing two members of this set is the same as the number of ways of choosing three members.

A classic counting problem is to determine the number of different ways that the letters of "Mississippi" can be arranged. Find that number.

Find the probability and answer the questions. In a Pew Research Center survey of Internet users, 3732 respondents say that they use social networking sites and 1380 respondents say that they do not use social networking sites. What is the probability that a randomly selected person does not use a social networking site? Does that result suggest that it is unlikely for someone to not use social networking sites?

Use the given data to construct a boxplot and identify the 5-number summary. The following are the ratings of males by females in an experiment involving speed dating.

$$\begin{matrix} \text{2.0} & \text{3.0} & \text{4.0} & \text{5.0} & \text{6.0} & \text{6.0} & \text{7.0} & \text{7.0} & \text{7.0} & \text{7.0} & \text{7.0} & \text{7.0} & \text{8.0} & \text{8.0} & \text{8.0} & \text{8.0} & \text{9.0} & \text{9.5} & \text{10.0} & \text{10.0}\\ \end{matrix}$$

The first transmission took 50 hours to rebuild at Bob's Auto Repair, and the learning rate is $80 \%$. How long will it take to rebuild the third unit? (Use at least three decimals in the exponent if you use the formula approach.)

a) under 30 hours

b) about 32 hours

c) about 35 hours

d) about 60 hours

e) about 45 hours

The number of cars arriving at Patti Mile’s Car Wash, in Orono, Maine, during the last 200 hours of operation is observed to be the following:

Simulate 15 hours of car arrivals and compute the average number of arrivals per hour. Select the random numbers needed from column 1, Table F.4, beginning with the digits $\$52$.