1

An investigator examined cases of fetal death in 27,000 cases and classified mothers according to whether...

Question

An investigator examined cases of fetal death in 27,000 cases and classified mothers according to whether...

An investigator examined cases of fetal death in 27,000 cases and classified mothers according to whether they had experienced sexual intercourse within 1 month before delivery. It was found that 11% of the mothers of fetuses that died and 2.5% of the fetuses that survived had had sexual intercourse during the period. It was concluded that that sexual intercourse during the month preceding delivery caused the fetal deaths. What guideline(s) did this researcher fail to take in to account? Why is the conclusion reached by the investigator incorrect?

Answers

1. May be incorrect because mothers who had intercourse during the month before the chirldbirth may differ in other important characteristics from those who did not.

2. May be incorrect because prevelance rates are used where incidence rates are needed.


Similar Solved Questions

1 answers
Score: 0 of 1 pt *10.1.1 Find the distance between the pair of points. (4,7) and...
Score: 0 of 1 pt *10.1.1 Find the distance between the pair of points. (4,7) and (16,16) The distance between the points is units. (Simplify your answer. Type an exact answer, using radicals as needed.) Enter your answer in the answer box and then click Check Answer. All parts showing...
1 answers
Question 2: Simultaneous quantity choiceTwo firms F1 and F2 produce a homogeneous product and compete on...
Question 2: Simultaneous quantity choiceTwo firms F1 and F2 produce a homogeneous product and compete on the same market. The market price is described by the inverse demand curveP= 11−2Q, where Q is total industry output andPis the market price. To keep things simple, suppose that each firm c...
1 answers
At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours
At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average am...
1 answers
(v) Geocoding is geo-referencing with subsequent resampling. Explain.
(v) Geocoding is geo-referencing with subsequent resampling. Explain....
1 answers
ABC Industries, Inc., needs a new lathe. It can buy a new high-speed lathe for $0.95...
ABC Industries, Inc., needs a new lathe. It can buy a new high-speed lathe for $0.95 million. The lathe will cost $33,100 to run, will save the firm $131,300 in labour costs, and will be useful for 11 years. Suppose that for tax purposes, the lathe will be in an asset class with a CCA rate of 25%. A...
1 answers
Old Country Links, Inc., produces sausages in three production departments—Mixing, Casing and Curing, and Packaging. In...
Old Country Links, Inc., produces sausages in three production departments—Mixing, Casing and Curing, and Packaging. In the Mixing Department, meats are prepared and ground and then mixed with spices. The spiced meat mixture is then transferred to the Casing and Curing Department, where the mi...
1 answers
Solve the given system of equations. X+ y + 6z = -25 X+ y + 4z...
Solve the given system of equations. X+ y + 6z = -25 X+ y + 4z = - 17 X-9y + 8z = 7 Select the correct choice below and fill in any answer boxes within your choice. )}. (Simplify your answers.) O A. There is one solution. The solution set is {(1 OB. There are infinitely many solutions. O C. There is...
1 answers
7. In the circuit shown, each battery has an emf of 9 V and each resistor...
7. In the circuit shown, each battery has an emf of 9 V and each resistor has a resistance of 1 ?. By how much does the current through the left resistor change when the switch is closed? a) 0.500 A b) 1.00 A c 1.50A d) 2.00 A e) 2.50 A...
1 answers
Need help on these 2 questions, thank you. Question 5 View Policies Current Attempt in Progress...
Need help on these 2 questions, thank you. Question 5 View Policies Current Attempt in Progress The critical difference between statistical and nonstatistical sampling is: O the required use of judgment in nonstatistical sampling. o the use of the laws of probability in statistical sampling to deter...
1 answers
1704 Mev 2 Question 21 5 pt What is the DeBroglie wavelength of an antineutrino with...
1704 Mev 2 Question 21 5 pt What is the DeBroglie wavelength of an antineutrino with a kinetic energy of 1.8 MeV? Take the mass of the antineutrino to be 4.99E-37 kg. 1.75 nm 2.88E-4 nm O 5.36E-16 nm 8.45E-12 nm 1.24 nm 5 pts Question 22...
1 answers
Alongside the RN, Identify what communication skills you may utilise when communicating with the client and...
Alongside the RN, Identify what communication skills you may utilise when communicating with the client and her family/carers so that they understand the implications of her admission (in 50-70 words)?...
1 answers
PN 105 Fundamentals of Nursing I Does Your Professional Image Need a Makeover? 1. What was...
PN 105 Fundamentals of Nursing I Does Your Professional Image Need a Makeover? 1. What was this article about? 2. What did you learn from this article?...
1 answers
6 -1 -4 -6 .4 -6-5-4 -3 -2-1 0 1 2 3 4 5 6 x...
6 -1 -4 -6 .4 -6-5-4 -3 -2-1 0 1 2 3 4 5 6 x (m) entify vectors P and Q in the figure. e abel of vector P on the figure is .. he label of vector Q on the figure is A:11 Bİ 21 C:31 D: 41 Submit Answer Tries 0/20 Let M - (P+). Calculate the magnitude of the vector M. (in m) A: 4.31B: 4.87C: 5.51D...
1 answers
This problem is a GRADED problem. As you do these calculations, notice the effect of the...
This problem is a GRADED problem. As you do these calculations, notice the effect of the reduced mass of the molecule on the spacing of the rotational lines in its spectrum. Assume the molecules are rigid rotors. Use Equation 1 on in Model 1 of Spectroscopy 8.1 to derive an equation for the energy d...
1 answers
The goal is to write several SQL queries that will answer questions over the database used...
The goal is to write several SQL queries that will answer questions over the database used by the imaginary Sierra Peak Climbing Club (SPCC), an organization whose members climb the mountain peaks of California’s Sierra Nevada mountain range. The database maintained by the SPCC has four tables...
1 answers
A loan of 18000 dollars is to be repaid in annual installments of 2200 dollars, the...
A loan of 18000 dollars is to be repaid in annual installments of 2200 dollars, the first due in one year, followed by a final smaller payment. If the effective rate of interest is 9 percent, what is the outstanding balance owed immediately after the 5th payment? Previous Problem Problem List Next ...
1 answers
The CFP Board asserts that following the financial planning process a.Determines whether or not a certificant is p...
The CFP Board asserts that following the financial planning process a.Determines whether or not a certificant is providing financial planning services b.Is optional, depending on the business model being followed by the certificant c.Is a good idea and financial planners should hav...

-- 0.016822--