How is the t-distribution similar to the standard normal z-distribution? a. Both are symmetrical distributions around...
How is the t-distribution similar to the standard normal z-distribution?
a. Both are symmetrical distributions around zero.
b. Both are discrete distributions.
c. Both have probability density functions are are defined by "degrees of freedom"
d. Both are skewed distributions.
Homework Answers
Solution :
The t-distribution similar to the standard normal z-distribution is ,
a. Both are symmetrical distributions around zero.
Add Answer to:
How is the t-distribution similar to the standard normal
z-distribution?
a. Both are symmetrical distributions around...
QUESTION 5 Which statement concerning the t-distribution is false? O AT follows a standard normal distribution...
QUESTION 5 Which statement concerning the t-distribution is false? O AT follows a standard normal distribution OB. The smaller the degrees of freedom the flatter the curve. OC. The t-distribution has a larger standard deviation than the Standard Normal Curve. OD. T-distributions have a mean of 0. o E. The total area under the density curve depends on the degrees of freedom. QUESTION 6 The t-procedures are robust when A. sample size is 12 and the sample data is not...
The t distribution is a discrete probability distribution. b) TrueFalseTrue The t distribution tends toward the standard...
The t distribution is a discrete probability distribution. b) TrueFalseTrue The t distribution tends toward the standard normal distribution as the degrees of freedom increase. c) FalseTrueClick for List The t distribution has a greater variance than the standard normal distribution. d) FalseTrueClick for List If T is a random variable with a t distribution, then P(T < 0) = 0.5. e) FalseTrueFalse For the t distribution, the mean and variance are always equal.
2. Fill this table with the appropriate critical values from the normal (z) or Student'st(t) distributions,...
2. Fill this table with the appropriate critical values from the normal (z) or Student'st(t) distributions, or indicate that none of these is applicable: Confidence level Population Sample size N standard deviation Distribution shape Z critical T critical 95% Unknown Normal Unknown Normal Known Skewed Known Skewed Unknown Normal 90% Skewed 98% Normal 98% Unknown Normal
The figure on the right shows three unimodal and symmetric curves: the standard normal (z) distribution,...
The figure on the right shows three unimodal and symmetric curves: the standard normal (z) distribution, the t-distribution with 5 degrees of freedom, and the t-distribution with 1 degree of freedom. Determine which is which, and explain your reasoning.
Below are the graphs of a standard Normal distribution and a t-distribution with 3 degrees of...
Below are the graphs of a standard Normal distribution and a t-distribution with 3 degrees of freedom 1. (a) Indicated which graph is which and explain how you know. Dotted graph- standord Normet Solid graph +distmbuton with d3 4 3 -2 1 2 4 (b) On the same figure sketch a graph of a t-distribution with 1 degree of freedom.
A z score of 1.25 represents an observation that is a) 1.25 standard deviation below the...
A z score of 1.25 represents an observation that is a) 1.25 standard deviation below the mean. b) 0.25 standard deviations above the mean of 1. c) 1.25 standard deviations above the mean. d) both b and c Assume that your class took an exam last week and the mean and standard deviation of the exam were 85 and 5, respectively. Your instructor told you that 30 percent of the students had a score of 90 or above. You would...
The difference between the T distribution and the standard normal (z) distribution decreases as the degrees...
The difference between the T distribution and the standard normal (z) distribution decreases as the degrees of freedom increase. True False When estimating the number of responses to be collected in order to achieve a desired margin of error on a proportion, what value should be used for the population proportion if no estimate is available? Enter your answer as a decimal to 2 decimal places. A population is believed to have a standard deviation of 23.1. An analyst wants...
Which is NOT a property of a normal distribution? A - Discrete X variables B -...
Which is NOT a property of a normal distribution? A - Discrete X variables B - Symmetrical distribution C - Bell-shaped distribution D -Approximately 68% of the scores fall between + and -1 standard deviation from the mean If the mean of a distribution is 84, the mode is 52 and the median is 58, the distribution is: A Positively skewed B Negatively skewed C Symmetric D Cannot tell from this information A few people do very poorly on a...
As degrees of freedom increases, the similarity between the t and z distributions: A. decreases. &
As degrees of freedom increases, the similarity between the t and z distributions: A. decreases. B. stays the same. C. increases. D. cannot be determined.
QUESTION 1 The normal curve is particularly useful as a model for a. data in which...
QUESTION 1 The normal curve is particularly useful as a model for a. data in which mean and median differ b. many populations of psychological and educational data c. distributions of sample statistics d. both (b) and (c) above QUESTION 2 A distribution has a mean of 60 and a standard deviation of 8. For a score of 72, the equivalent z score a. is +1.5 b. is between 0 and +1.0 c. is + 1.2 d. cannot be determined...
QUESTION 5 Which statement concerning the t-distribution is false? O AT follows a standard normal distribution OB. The smaller the degrees of freedom the flatter the curve. OC. The t-distribution has a larger standard deviation than the Standard Normal Curve. OD. T-distributions have a mean of 0. o E. The total area under the density curve depends on the degrees of freedom. QUESTION 6 The t-procedures are robust when A. sample size is 12 and the sample data is not...
2. Fill this table with the appropriate critical values from the normal (z) or Student'st(t) distributions, or indicate that none of these is applicable: Confidence level Population Sample size N standard deviation Distribution shape Z critical T critical 95% Unknown Normal Unknown Normal Known Skewed Known Skewed Unknown Normal 90% Skewed 98% Normal 98% Unknown Normal
The figure on the right shows three unimodal and symmetric curves: the standard normal (z) distribution, the t-distribution with 5 degrees of freedom, and the t-distribution with 1 degree of freedom. Determine which is which, and explain your reasoning.
Below are the graphs of a standard Normal distribution and a t-distribution with 3 degrees of freedom 1. (a) Indicated which graph is which and explain how you know. Dotted graph- standord Normet Solid graph +distmbuton with d3 4 3 -2 1 2 4 (b) On the same figure sketch a graph of a t-distribution with 1 degree of freedom.
Most questions answered within 3 hours.
-
Industry standards suggest that 16% of new vehicles require
warranty service within the first year. Jones...
asked 8 minutes ago -
1) Comment of this statement: “A compiler transforms high-level
language statements directly into object codes”.
asked 11 minutes ago -
Calculate the molality, mole-fraction and percent mass of 28.9M
HF at 25 degrees Celcius of the...
asked 20 minutes ago -
A developmental psychologist believes that children raised in
bilingual families will have higher verbal fluency at...
asked 27 minutes ago -
A fast food meal has 5660 kJ of energy. A person uses energy at
a rate...
asked 39 minutes ago -
The pKb for a generic amine(R-NH2)) in
aqueous solution is 6.30. What is its pKa?
asked 40 minutes ago -
The following reactions have the indicated equilibrium constants
at a particular temperature: N2(g) + O2(g) ⇌...
asked 43 minutes ago -
Please Help ASAP.
1Consider the below code which iterates over a linked
list of n nodes...
asked 59 minutes ago -
Determine the air to fuel ratio of:
Canadian natural gas, with 93.9% methane, 4.2% ethane, 0.3%...
asked 59 minutes ago -
A manufacturer of power tools claims that the average amount of
time required to assemble their...
asked 1 hour ago -
"electron-withdrawing substituents on carbon encourage back
donation", then on the next page he says that "greater...
asked 1 hour ago -
On December 31, 2016, the shareholders’ equity section of the
balance sheet of R & L...
asked 1 hour ago