A researcher would like to examine whether there is a consistent, predictable relationship between political preference and personality. A sample of 100 students is obtained. The results are summarized in the following frequency distribution. Which chi-square value is obtained when conducting a chi-square test of independence, and which decision should be made regarding the hypothesis test using α = 0.05?                                                                         Political Preference                                                             Liberal                                         Conservative                      Type A Personality            ​ Observed Frequency = 15 Expected Frequency = 23.65 Observed Frequency = 40 Expected Frequency = 31.35 Observed Frequency = 28 Observed Frequency = 17                      Type B Personality Expected Frequency = 19.35 Expected Frequency = 25.65 ​

The following table shows the results of an analysis of variance comparing three treatment conditions with a sample of n = 7 participants in each condition. Note that several values are missing in the table. What is the missing value for MSbetween? Source         SS      df      MS Between      20      xx      xx      F = xx Within         xx      xx        2 Total            xx     xx  

Exhibit 13-7The following is part of an ANOVA table, which was the result of three treatments and a total of 15 observations. Source of Variation Sum ofSquares Degrees ofFreedom MeanSquare F Between treatments 64       Within treatments (Error) 96       Total         ​   Refer to Exhibit 13-7. The computed test statistic (F-ratio) is _____.

Exhibit 13-7The following is part of an ANOVA table, which was the result of three treatments and a total of 15 observations. Source of Variation Sum ofSquares Degrees ofFreedom MeanSquare F Between treatments 64       Within treatments (Error) 96       Total         ​   Refer to Exhibit 13-7. If at a 5% level of significance, we want to determine whether or not the means of the populations are equal, the critical value of F is _____.

The following table shows the results of an analysis of variance comparing three treatment conditions. What is the value of h2, the percentage of variance accounted for? Source         SS      df      MS Between      30        2      15      F = 7.50 Within         60      30        2 Total            90      32 ​

Of the following substances, __________ has the highest boiling point.  

As the number of covalent bonds between two atoms increases, the distance between the atoms __________ and the strength of the bond between them __________.  

The enthalpy change for converting 10.0 g of ice at -25.0°C to water at 80.0°C is __________ kJ. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H2O, ΔHfus = 6.01 kJ/mol, and ΔHvap = 40.67 kJ/mol  

Consider the following properties of an element:       (i)    It is solid at room temperature.       (ii)  It easily forms an oxide when exposed to air.       (iii) When it reacts with water, hydrogen gas evolves.       (iv)  It must be stored submerged in oil. Which element fits the above description the best?  

The ability of an atom in a molecule to attract electrons is best quantified by the __________.