﻿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