Suppose that the sitting back-to-knee length for a group of adults has a normal distribution with a mean of μ=24.0 in. and a standard deviation of σ=1.1 in. These data are often used in the design of different seats, including aircraft seats, train seats, theater seats, and classroom seats. Instead of using 0.05 for identifying significant values, use the criteria that a value x is significantly high if P(x or greater) ≤0.01 and a value is significantly low if P(x or less) ≤0.01. Find the back-to-knee lengths separating significant values from those that are not significant. Using these criteria, is a back-to-knee length of 26.3 in. significantly high?
***Find the back-to-knee lengths separating significant values from those that are not significant.
Back-to-knee lengths greater than ____ in. and less than _____ nothing in. are not significant, and values outside that range are considered significant.
(Round to one decimal place as needed.)
***A back-to-knee length of 25.3 in. ______ [is or is not] significantly high because it is _______ [Inside or outside] the range of values that are not considered significant.
In: Statistics and Probability
Calculate the pH of a solution made by mixing 49.5 mL of 0.335 M NaA (Ka for HA = 1.0 x 10^-9) with 30.6 mL of 0.120 M HCl.
The answer given was 9.55. But I am stuck on how to get there after the ICE table. Can someone include a step by step.
In: Chemistry
The market return is 10% and the risk free rate is 3%. Rascals Inc. has a market beta of 1.0, a SMB beta of −.60, and a HML beta of −0.85. If the risk premium on HML and SMB are both 2%, using the Fama-French Three Factor Model, what is the expected Return on Rascal Inc. stock?
In: Finance
If each of the seven individuals pulls water in with a velocity of 3.0 mm per second through an incurrent siphon 1.0 mm in diameter, and the combined water from all seven individuals exits the shared excurrent siphon, which has a diameter of 1.5 mm, what is the velocity of the water as it leaves the excurrent siphon?
In: Physics
A + 4.0 μ C charge is placed 5.0 c m to the left of a − 9.0 μ C charge. A − 1.0 μ C charge will experience no net electrical force acting on it if it is placed __A__ c m to the [ Select ] ["left", "right"] of the + 4.0 μ C charge.
From previous question: __A__ =
In: Physics
WHICH OF THE FOLLOWING REACTIONS REPRESENTS A STRONG ACID?
A. HCl ---> H+ +Cl-
B. NH3 + H+ <-----> NH4+
C. H2CO3 <----> HCO3- + H+
D. NaOH ---> Na+ +OH-
A solution has a pH of 1.0 x 10^(-2)M. What best describes the solution?
BASIC
ACIDIC
SALTY
NEUTRAL
In: Biology
A firm is considering a project that is virtually risk-free. The company has a beta of 1.3 and a debt-equity ratio of.4. The appropriate discount rate to use in analyzing this project is: Multiple Choice
The cost of equity capital.
Zero.
The Treasury bill rate.
An adjusted WACC based on a beta of 1.0.
The firm's latest WACC.
In: Accounting
How long does it take the Sun to melt a block of ice at 0∘C with a flat horizontal area 1.0 m2 and thickness 1.9 cm ? Assume that the Sun's rays make an angle of 32 ∘ with the vertical and that the emissivity of ice is 0.050.
Express your answer to two significant figures and include the appropriate units.
In: Physics
Cesium-124 has a half-life of 30.9 s.
a) How many Cs-124 nuclei are in 19 micrograms of said isotope?
b) How about after 2.4 min?
c) How strong is its activity then?
d) After which time has activity dropped below 1.0 Bq?
In: Physics
Select the most efficient member for the following LRFD required moments and unsupported lengths. Assume Cb = 1.0.
|
Mr |
Lb |
|
630 kip-ft |
30 ft |
|
160 kip-ft |
10 ft |
|
350 kip-ft |
16 ft |
|
400 kip-ft |
8 ft |
In: Civil Engineering