Reference no: EM13712849
1. For a population with m = 50 and a standard deviation of s = 10,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
a. Find the z-score for eachof the following X values.
X= 55 X = 60 X = 75
X= 45 X = 30 X = 35
b. Find the score (X value) thatcorresponds to each of the following z-scores.
z = 1.00 z= 0.80 z = 1.50
z = -0.50 z= -0.30 z = -1.50
2. Find the z-scorecorresponding to a score of X = 60 for each of the following
distributions.
a. m= 50 and s = 10
b. m= 50 and s = 5
c. m= 70 and s = 20
d. m= 70 and s = 5
3. For a sample with a standarddeviation of s = 6, a score of X = 65 corresponds to z = 1.50.What is the sample mean?
4. For each of the following,identify the exam score that should lead to the better grade.
a. A score of X = 43, on an examwith µ = 40 and σ = 2, or a score of X = 60 on an exam with µ = 50 and σ = 20.
b. A score of X = 55, on an examwith µ = 60 and σ = 5, or a score of X = 40 on an exam with µ = 50 and σ =20.
5. A distribution with a mean of m = 64 and a standard deviation of s = 4 is being transformed into a standardizeddistribution with m= 100 and a s= 20. Find the new, standardized score for each of thefollowing values from the original population.
a. X = 60 c. X = 52
b. X = 72 d. X = 66
6.A kindergarten class consists of 14 boys and 11 girls. If the teacher selectschildren from the class using random sampling,
a. What is the probability that thefirst child selected will be a girl?
b.If the teacher selects a random sample of n = 3 children and the first twochildren are both boys, what is the probability that the third child selectedwill be a girl?
|
Complete dissociation of solute
: What would be the vapor pressure of water at 97 degrees C above a solution made by dissolving 68.86 of copper (II) nitrate, Cu(NO3)2, in 282.4 g of water? The vapor pressure of pure water at this temp is 682.1 mmHg. Assume complete dissociation of..
|
|
What is an interaction
: What is an interaction? Describe an example and identify the variables within your population (work, social, academic, etc.) for which you might expect interactions?
|
|
What is the closest value to the molecular weight of the gas
: A certain bike tire deflates (via effusion) through a hole in 60.00 minutes when filled with pure Nitrogen gas. If the same bike tire, inflated to the same pressure with an unknown gas under all the same conditions, deflates in 71.71 minutes, what..
|
|
Explain what is the partial pressure of cl2
: Question- 5.00 grams each of F2 and Cl2 are in a container with a total pressure of 2.00atm at 298K. What is the partial pressure of Cl2?
|
|
Find the z-score for eachof the following x values. x= 5
: 1. For a population with m = 50 and a standard deviation of s = 10,
|
|
What percentage of the atoms of carbon in the biosphere
: In a living organism, the decay of C-14 produces 15.3 disintegrations per minute per gram of carbon. The half-life of C-14 is 5730 years. A bone sample with 2.8 g of carbon has 25.0 disintegrations per minute. How old is the bone sample in years? ..
|
|
Define with no change in the temperature or moles of gas
: A sample of ideal gas at room temperature occupies a volume of 12.0L at a pressure of 272torr. If the pressure changes to 1360torr, with no change in the temperature or moles of gas, what is the new volume, V2?
|
|
How many grams of barium hydroxide were added
: The vapor pressure of pure water at 96 degrees C is normally 657.6 mmHg, but decreased to 622.8 mmHg upon addition of an unknown amount of barium hydroxide, Ba(OH)2, to 247.5 g of water at this temp. How many grams of barium hydroxide were added? ..
|
|
A local corporation was interested in the purchasing habits
: A local corporation was interested in the purchasing habits of Wake County residents.Specifically one of the things they were interested in was the proportions of residents that did a major home improvement project in the last year.
|