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Chapter 10 (In-chapter quizzes)
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Gravity
Terms in this set (18)
What are the three problems identified by loannidis?
selective publication; the p<.05 imperative (or questionable research practices, or p-hacking), lack of replication.
State whether or not each of the following is a questionable research practice:
a. deciding to drop some outliers from the analysis.
b. examining the data, then deciding to run some additional participants.
c. reporting full details of the data analysis.
d. preregistration of a research plan.
e. seeing the results then deciding to use Cohen's d.
a. yes
b. yes
c. no
d. no
e. yes
p-hacking is
a. the use of questionable research practices to achieve statistical significance.
b. the combination of p values from different studies, as a form of meta-analysis.
c. appreciation that larger p values (values>.05) can be valuable.
d. an important component of Open Science.
a.
Researchers have been reluctant to carry out replications because
a. there seems little point, once a finding has achieved statistical significance.
b. journals prefer to publish new findings, not replications.
c. journal publication is required for career advancement.
d. all of the above.
d.
Psychological Science recommends use of NHST/estimation, to avoid problems associated with NHST/estimation.
estimation; NHST
The three Open Science badges are for _______, _______ and ______.
open data, open materials, preregistration.
Precision for planning requires choice of target _______, which is expressed in units of ______.
MoE; population
To aim for a CI half as long, expect required N to be about ______ as large.
4x
Assurance of 99% means that
a. target MoE refers to a 99%CI
b. the population correlation is .99.
c. on average, 99% of studies will have MoE greater than target MoE.
d. 99% of studies will have MoE no greater than target MoE.
d.
For independent groups, precision for planning analysis indicates that N = 32 will give MoE of 0.50 on average. For assurance of 99%, required N will be smaller/larger. Reduce target MoE and required N will be smaller/larger.
larger; larger
For a paired design, increase ρ and required N will decrease/increase, Increase target MoE and required N will decrease/increase.
decrease; decrease
For a paired design, required N is strongly influenced by ______ and also by _______, which has symbol _________.
target MoE; population; correlation; ρ.
Power is the probability of rejecting/not rejecting/accepting H0 when the null/alternative hypothesis is true. It can take values between -1/0/.5 and 0/.5/1.
rejecting; alternative; 0; 1
If β = .10, power = _______ and the Type II error rate is _____.
.90; .10
To calculate power, we need an exact value of target _______, which is chosen and stated in advance/by convention take to be .80, and is the size of effect/N we are interested in.
population effect size δ; advance; size of effect
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Verified questions
QUESTION
Suppose that 1 Danish krone could be purchased in the foreign exchange market today for $0.15. If the krone appreciated 4% tomorrow against the dollar, how many krones would a dollar buy tomorrow?
QUESTION
Arlington Corporation’s financial statements (dollars and shares are in millions) are provided here. $$ \begin{matrix} \text{Balance Sheets as of December 31}\\ \text{ } & \text{2016} & \text{2015}\\ \text{Assets}\\ \text{Cash and equivalents} & \text{\$ 15.000} & \text{\$ 14.000}\\ \text{Accounts receivable} & \text{35.000} & \text{30.000}\\ \text{Inventories} & \text{33.320} & \text{27.000}\\ \text{Total current assets} & \text{\$ 83.320} & \text{\$ 71.000}\\ \text{Net plant and equipment} & \text{48.000} & \text{46.000}\\ \text{Total assets} & \text{\$ 131.320} & \text{\$ 117.000}\\ \text{Liabilities and Equity}\\ \text{Accounts payable} & \text{\$ 10.100} & \text{\$ 9.000}\\ \text{Accruals} & \text{8.000} & \text{6.000}\\ \text{Notes payable} & \text{7.000} & \text{5.050}\\ \text{Total current liabilities} & \text{\$ 25.100} & \text{\$ 20.050}\\ \text{Long-term bonds} & \text{20.000} & \text{20.000}\\ \text{Total liabilities} & \text{\$ 45.100} & \text{\$ 40.050}\\ \text{Common stack (4.000) shares)} & \text{40.000} & \text{40.000}\\ \text{Retained earnings} & \text{46.220} & \text{36.950}\\ \text{Common equity} & \text{\$ 86.220} & \text{\$ 76.950}\\ \text{Total liabilities and equity} & \text{\$ 131.320} & \text{\$ 117.000}\\ \end{matrix} $$ $$ \begin{matrix} \text{Income Statement for Year Ending December 31, 2016}\\ \text{Sales} & \text{\$ 210.000}\\ \text{Operating costs excluding depreciation and amortization} & \text{160.000}\\ \text{EBITDA} & \text{\$ 50.000}\\ \text{Depreciation & amortization} & \text{6.000}\\ \text{EBIT} & \text{\$44.000}\\ \text{Interest} & \text{5.350}\\ \text{EBT} & \text{\$ 38.650}\\ \text{Taxes (40\\%)} & \text{15.460}\\ \text{Net income} & \text{\$ 23.190}\\ \text{Dividends paid} & \text{\$ 13.920}\\ \end{matrix} $$ a. What was net operating working capital for 2015 and 2016? b. What was Arlington’s 2016 free cash flow? c. Construct Arlington’s 2016 statement of stockholders’ equity. d. What was Arlington’s 2016 EVA? Assume that its after-tax cost of capital is 10%. e. What was Arlington’s MVA at year-end 2016? Assume that its stock price at December 31, 2016, was $25.
QUESTION
The Stewart Company has $2,392,500 in current assets and$1,076,625 in current liabilities. Its initial inventory level is $526,350, and it will raise funds as additional notes payable and use them to increase inventory. How much can its short-term debt (notes payable) increase without pushing its current ratio below 2.0?
QUESTION
You work for an employer that encourages workers to ride the train to work by providing train passes at the at the reduced rate of $16 per week. If you drive to work, your travel costs per week include$10.25 for gas, $25 for parking, and$20 for toll fares. Assuming you work 48 weeks per year, how much will you save if you ride the train?
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