11.

The answer to the question, “Where did modern humans come from?” __________.

12.

Which of the following would provide evidence supporting the multiregional model?

13.

Which of the following are early human remains found in the United States?

14.

Which of the following characteristics is a good indicator that the remains being examined are modern and not archaic Homo sapiens?

15.

Which of the following describes technical intelligence?

A neuropsychologist and physical therapist believe that patients with brain injury who begin physical therapy very early have better cognitive outcomes that patients who do not engage in early intervention. To test their research question they design a study using two groups of patients on the rehabilitation unit. One group of patients begins physical therapy within two hours of their transfer to the unit. Physical therapy involves sitting up, moving to the edge of the bed, placing feet on the floor and standing (with assistance) three times per day. The other group receives current treatment practices. After 3-weeks on the unit, a cognitive test of attention was administered. Using α = .05, determine whether the results were statistically significant.

1. Identify the independent variable.

2. Identify the dependent variable.

3. State the null and alternative hypothesis . You can use words or notation.

4. Establish the critical boundary for the research question

5. Calculate

   • Include answer for pooled variance
   • Include answer for standard error
   • Include answer for t-score

6. Summarize your results, including research notation, your decision and an explanation

7. Calculate and interpret r² (if appropriate)

8. What else could explain the change in attention between the samples (confounding or extraneous variables - think groups not just individual people)?

Individuals filing federal income tax returns prior to March 31 received an average refund of $1077. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15).

a. A researcher suggests that a reason individuals wait until the last five days is that on average these individuals receive lower refunds than do early filers. Develop appropriate hypotheses such that rejection Ho of will support the researcher's contention.

Ho: μ is

Hα: μ is

b. For a sample of 400 individuals who filed a tax return between April 10 and 15, the sample mean refund was $920. Based on prior experience a population standard deviation of σ=$1800 may be assumed. What is the p-value (to 4 decimals)?

c. Using , α= 0.05 can you conclude that the population mean refund for "last minute" filers is less than the population mean refund for early filers? Answer the next three questions using the critical value approach.

d. Using α= 0.05, what is the critical value for the test statistic? Enter negative value as negative number. State the rejection rule: Reject α= 0.05 if z is ___ the critical value.

Using α= 0.05, can you conclude that the population mean refund for "last minute" filers is less than the population mean refund for early filers?

A. Byrde Co. purchased a truck. The seller asked for $11,000, but Byrde paid only $10,000 after negotiation. The owner of Byrde Co. believes he got a great deal and the truck is really worth $15,000. What amount does Byrde record on its financial statements for the truck?

'

B. Snell Co. performs and completes services for a client in May and bills the client $1,000. In June, the client makes a partial payment of $300 cash for the services. In July, the remaining $700 cash is paid. Determine the monthly revenue recorded in May, June, and July for this service. (Leave no cells blank - be certain to enter "0" wherever required.)

As the full-time bookkeeper, your job is to make any corrections to the general ledger accounts. Each correction needs the reason for the change and the effect on each account, whether it is an increase or decrease. For the third time this month, a co-worker has recorded a cash receipt twice and wants you to record a correcting entry that will reverse the mistakes. The correcting entry will record a credit to the Cash account and a debit to the Sales account. Your co-worker has offered to buy you dinner for fixing this mistake. What should you investigate before making a decision about the correcting entry? What is happening to the Cash account? Would you accept a dinner offer from your co-worker for fixing the mistake?

Your portfolio allocates equal funds to the DW Co. and Woodpecker, Inc. DW Co. stock has an annual return mean and standard deviation of 12 percent and 35 percent, respectively. Woodpecker, Inc., stock has an annual return mean and standard deviation of 23 percent and 49 percent, respectively. The return correlation between DW Co. and Woodpecker, Inc., is zero. What is the smallest expected loss for your portfolio in the coming month with a probability of 16 percent? (Negative value should be indicated by a minus sign. Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places. Omit the "%" sign in your response.) Smallest expected loss %

for the following compounds:

i) give the correct name and indicate the possible isomers for parts (d, f, g,h,j)

ii) determine the dⁿ configuration, coordination number for the metal and electron count according to the 18 electron rule

iii) calculate the spin only magnetic moment

a) K [Mn(CO)_5]   b) H[AuCl₄]

c) Na[n²-C₂H₄)PtCl₃] d) [(n⁶-C₆H₆)₂Cr]

e) K₂[PdCl₄] f) [Ru(H)(Cl)(CO)(PPh₃)₃]

g) [Co(NO₂)(NH₃)₅]SO₄ h) [CoCl(en)(NH₃)₃]Cl

i) [Ir(phen)(Cl)₄] j) [Cr(en)₃]Cl₃

A-CH3SH reacts with CO according to the following unbalanced chemical equation:

CH3SH + CO → CH3CO(SCH3) + H2S

Calculate the mass in grams of the excess reagent remaining after the complete reaction of 2.17 g of CH3SH with 1.45 g of CO. ( )

B- a compound containing only C, H and O was subjected to combustion analysis. A sample of 4.270×10¹ g produced 9.200×10¹ g of CO₂ and 3.766×10¹ g of H₂O. Determine the empirical formula of the compound and enter the appropriate subscript after each element.

C( ) H( ) O( )

If the molar mass of the compound is 204.266 g/mol, determine the molecular formula of the compound and enter the appropriate subscript after each element.
C( ) H( ) O( )

11. Calculate the pH of a solution prepared by mixing

a) 48.0 mL of 0.212 M NaOH and 66.0 mL of 0.187 M HCl

b) 69.0 mL of 0.345 M KOH and 125 mL of 0.400 M HC3H5O2

c) 350 mL of 0.130 M NH3 and 400 mL of 0.100 M HCl