ECO254
____________defined as the difference between the sample statistic (s) and the population parameter being estimated (P).
*sampling error*
A statistical test in which the critical area of a distribution is one-sided so that it is either greater than or less than a certain value, but not both is _____________
*One tailed test*
A regression analysis with one explanatory variable is called a _____________
*Simple Regression*
One of the uses of statistics is to make a _____________
*Decisive decision*
Alternative hypothesis is denoted as _____________
*H1*
_____________ is said to be a measurement of how expectations are compared to results.
*Chi-square*
The regression equation for predicting number of speeding tickets (Y) from information about driver age (X) is Y = -.065(X) + 5.57. How many tickets would you predict for a twenty-year-old?
*4.27*
_____________ is a statistical process for estimating the relationship among variables.
*Regression analysis*
Regression analysis is widely used for _____________ and Forecasting
*Prediction*
Regression analysis is a statistical process for estimating the relationship among _____________
*Variables*
_____________ is generally performed on a small set of data.
*T test*
The calculation of sampling distribution is a step forward to look at different ways of obtaining distribution of proportion process of _____________ data
*Pooled*
{100:SHORTANSWER:%100%Negative}Negative
{100:SHORTANSWER:%100%positive}positive
_____________ of additivity is an approach used in ANOVA (that is a region analysis involving two qualitative factors) to detect whether the factor variables are additively related to the expected value of the response variables.
*Turkey’s Test*
_____________ is a statistical test that is used on paired nominal data
*McNemar’s Test*
_____________ statistics are collections of test statistics that is used for the analysis of stratified categorical data
*Cochram – Mantel*
_____________ occurs when/if an hypothesis (Null hypothesis) is rejected when it should be accepted and this occurs when the hypothesis value falls within acceptance region..
*type 1 error*
A _____________ can said to be a measurement of how expectations are compared to results.
*Chi-square*
Type 2 error is a situation when one accepts the hypothesis when it should be ________
*Rejected*
An _____________ can be defined as any statistical test in which the test statistics has an F distribution under a null hypothesis situation and it is usually used when comparing statistical models in a data set so that we can identify the mode that best fits the population where the date were sampled
*F-test*
The probability (or risk) or committing type 2 error is denoted by the Greek letter _____________
*β*
A t-test is any statistical test in which the test statistic follows a student’s t _____________ if the null hypothesis is supported.
*Distribution*
A _____________ is the set of all possible values of a particular statistic
*sampling distribution*
A _____________ connects the midpoints of the tops in the histogram
*Frequency polygon*
The probability (or risk) or committing type 1 error on a true null hypothesis is denoted by the Greek letter _____________
*α*
Matching is carried out by identifying pairs of values consisting of one observation from each of the two _____________
*Samples*
In an experimental research, the scientist may have two groups, an experimental group and a _____________
*control group*
The explained variable from the equation Z = Bo + B1X1 + B2X2 is _____________
*Z*
Interval estimation involves estimating an interval which is known as _____________
*confidence interval*
Another technique that can be employed with respect to the issue of rejecting or accepting Ho is _____________
*interval estimation*
The _____________ curve is one of the most popular models used in statistical tests of hypothesis
*Normal*
The standard deviation of the sampling distribution is known as the _____________
*standard error*
The two tailed test gets its name from testing the area under both of the tails (sides) of a _____________
*normal distribution*
The one tailed test gets its name from testing the area under one of the tails (sides) of a _____________
*normal distribution*
In test of hypothesis, the maximum probability of risking a type 1 error is known as the _____________
*level of significance*
A _________distribution is a probability distribution that has a probability density function.
Discrete probability
The values of a parameter and that of the corresponding statistics are not always the same _____
Population
A regression analysis is inappropriate when ________
There is heteroscedasticity in the scatter plot.
_______ measure is the standard way of assigning a measure to a subsets of an n-dimensional volume
Lebesgue
When a die is thrown once, the probability of getting one is _____
0.1667
Probability distributions is used for so many purpose such as ________
measurement of different possible outcome and a random experiment
______ is a tentative statement in a statistical analysis
None of the Options
___________shows the distributions of probabilities associated with values or ranges of a random variable.
Probability distributions
The two types of hypothesis are ______ and _____ hypothesis
Null and Alternative
Three out of the 9 finalists in an African American beauty competition are Nigerians. If two winner are to be selected, find the probability that; at least one of them would be a Nigerian.
0.58
When an equation is in a general term in a multinomial expansion it is called ____
Multinomial distribution
H1 in hypothesis testing is _______
None of the Options
If an individual were selected at random from a large group of adult females, the probability that it has height M is precisely 68 inches (that is 68.00 inches) would be zero. What is the probability that M is between 67.00 inches and 68.00 inches.
None of the Options
______ is a random variables that we assigns a probability to each possible value
Discrete random variables
In a statistics examination for secondary students, the 23 females used in the study has a mean score of 81 and a variance of 12 while the 20 males used has a mean score of 78 and a variance of 10. Do you think gender have an effect on the score of the secondary student at 99% level significance?
None of the Options
The Cauchy distribution is named after _____
None of the Options
A _____ is any statistical test in which the test statistic follows a student’s t distribution if the null hypothesis is supported.
T test
_____ error occurs when/if an hypothesis is rejected when it should be accepted
Type 1
The numerical value of the decision rule is called _____
All of the Options
A coin also has a uniform distribution because the _____ in a coin toss is the same
Probability of getting either heads or tails
Calculate the variance of uniform distribution given that (a + b) = 6/200 and b = 2.20 while a = 1.10
None of the Options
An F test is a statistical test in which the test statistics has ____ distribution under a null hypothesis situation
None of the Options
In statistical analysis the 99% confident level is also known as _____
0.01
Null hypothesis is denoted as ______
Ho
A deck of cards has a uniform distribution because the likelihood of drawing a heart, a club, a diamond or spade is equally _____
Likely
_____ is used to determine all reasonably likely values of the difference between two population means
None of the Options
A graph for frequency distribution can be supplied by a _____
All of the Options
Ho in hypothesis testing is a ___
None of the Options
When a random variable takes values from a continuous probabilities that are non- zero, this can only refer to _____
Infinite intervals
_____ statistical test in which the critical area of a distribution is one-sided
One-tailed test
One-tailed tests are used for asymmetric distributions that have a ______
single tail
_________are those parameters that are used in estimating variables of selected population parameters.
Sample parameters
The t-statistics was introduced in ________
1908
______ test is used when testing for independence in a contingency table
None of the Options
The t-statistic was introduced by Willian Sealey Gosset, a ______ working for Guinness Brewery in Dublin Finland
None of the Options