An increasing number of public school districts are utilizing the iPad as a teaching tool. For example, one high school in Long Island recently distributed 47 iPads to the students and teachers in two humanities classes, with expectations that in time all 1,100 students will be provided with iPads (Hu 2011). Educators are divided on their opinion as to the academic benefit of iPads. Much research is needed to determine if iPads are an enhancement to learning or just another technological fad. Suppose that a random sample of high school teachers (math, history, science, and language teachers) were surveyed and asked, Do you think the iPad will enhance learning? Determine if there is an association between the subject taught and the response to this question.

$$\begin{array}{lcc} \hline & {\text { iPad Enhances Learning? }} \\ \hline \text { Subject } & \text { Yes } & \text { No } \\ \text { Math } & 68 & 32 \\ \text { History } & 70 & 30 \\ \text { Science } & 60 & 50 \\ \text { Language } & 50 & 40 \\ \hline \end{array}$$

A random sample of 125 monthly balances for holders of a particular credit card indicated that the sample skewness was 0.55 and the sample kurtosis was 2.77. Test the null hypothesis that the population distribution is normal.

Consider a regression analysis with n = 34 and four potential independent variables. Suppose that one of the independent variables has a correlation of 0.23 with the dependent variable. Does this imply that this independent variable will have a very small Student’s t statistic in the regression analysis with all four predictor variables?

Select a stock such as Apple, Dell, or Microsoft and use the Jarque-Bera test to determine if the annual daily rates of return for a particular year follow a normal distribution.

A random sample of 100 measurements of the resistance of electronic components produced in a period of 1 week was taken. The sample skewness was 0.63 and the sample kurtosis was 3.85. Test the null hypothesis that the population distribution is normal.

A random sample of 50 students was asked to estimate how much money they spent on textbooks in a year. The sample skewness of these amounts was found to be 0.83 and the sample kurtosis was 3.98. Test at the 10% level the null hypothesis that the population distribution of amounts spent is normal.

In a period of 100 minutes there were a total of 190 arrivals at a highway toll booth. The accompanying table shows the frequency of arrivals per minute over this period. Test the null hypothesis that the population distribution is Poisson.

$$\begin{array}{lccccc} \hline \text { Number of arrivals } & & & & & \\ \text { in minutes } & 0 & 1 & 2 & 3 & 4 \text { or more } \\ \hline \text { Observed frequency } & 10 & 26 & 35 & 24 & 5 \\ \hline \end{array}$$

The number of times a machine broke down each week was observed over a period of 100 weeks and recorded in the accompanying table. It was found that the average number of breakdowns per week over this period was 2.1. Test the null hypothesis that the population distribution of breakdown is Poisson.

$$\begin{array}{lcccccc} \hline \text { Number of breakdowns } & 0 & 1 & 2 & 3 & 4 & 5 \text { or more } \\ \hline \text { Number of weeks } & 10 & 24 & 32 & 23 & 6 & 5 \\ \hline \end{array}$$

A random sample of statistics professors was asked to complete a survey including questions on curriculum content, computer integration, and software preferences. Of the 250 responses, 100 professors indicated that they preferred software package M and 80 preferred software package E, whereas the remainder were evenly split between preference for software package S and software package P. Do the data indicate that professors have a preference for any of these software packages?

A random sample of 150 residents in one community was asked to indicate their first preference for one of three television stations that air the 5 p.m. news. The results obtained are shown in the following table. Test the null hypothesis that for this population their first preferences are evenly distributed over the three stations.

$$\begin{array}{lccc} \hline \text { Station } & \text { A } & \text { B } & \text { C } \\ \hline \text { Number of first preferences } & 47 & 42 & 61 \\ \hline \end{array}$$

On the lines provided, rewrite each of the following sentences, correcting the unclear or inexact pronoun references. You may need to add or rearrange words to make the sentences clear and meaningful.

Example 1. Nha shook hands with Stephen when he presented the award. $\underline{\text{When Stephen presented the award, he shook hands with Nha.}}$

6. In my history classroom, they like to pull the desks into a circle.________________________________________________________________________

Many individuals in the history of the United States have been able to influence the political process because of their personal wealth. Examples include Andrew Carnegie, John D Rockefeller, and – more recently – Microsoft founder Bill Gates. Capitalism encourages the accumulation of wealth. Do you think the government should put limits on how much wealth any one individual or organization can control? Why or why not?

In the following sentences if the verb does not agree with its subject, cross out the incorrect verb form and write the correct form above it. If the verb already agrees with the subject, write C above the verb.

Example 1. The films in the class that $\overset{\textit{\color{#c34632}{is}}}{\sout{\text{are}}}$ on film history included a clip of Marceau.

The French mime Marcel Marceau, who was born in $1923$, performs with graceful simplicity.

Add quotation marks and single quotation marks where they are needed in the following sentences. Be careful to show the correct position of quotation marks in relation to other marks of punctuation.

Example 1. " Have you read the short story ' Speaking of Courage ' ?" wondered Durga.

1. Felipe cleared his throat and then said, Reading the Declaration of Independence has given me a new understanding of my country's history.