Suppose we need to do a one-sample hypothesis test about a population mean. A sample of 50 data values is randomly selected from the population. Which of the following assumptions is certain to be true for this test? Both of these. The population has a normal distribution. Neither of these. The sample size is large enough to satisfy the central limit theorem.

Suppose we need to do a one-sample hypothesis test about a population mean. A sample of 50 data values is randomly selected from the population. Which of the following assumptions is certain to be true for this test? Both of these. The population has a normal distribution. Neither of these. The sample size is large enough to satisfy the central limit theorem.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99% confidence that the sample mean is within 5 IQ points of the true mean. Assume that σ =10 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation. A. The required sample size is____ B. Would it be reasonable to sample this number of students?
Suppose x1, x2, and x3 are predictor variables and y is the response variable of a population. Consider the population consisting of all members of the original population having specied values of the three predictor variables. Thedistribution, mean, and standard deviation of the response variable on that population are called, respectively, the ________, _______, and ___________ of the response variable corresponding to the specied values of the predictor variables.
?Which of the following is not one of the assumptions made in the analysis of variance The distribution of the respomse variable is a normal A O Each sample is an independent random sample .B O None of these.C O .The different populations all have the same mean .D O o The different populations all have the same standard deviation E O
Default value of a. If a is not given, use .05. A random sample from a certain population consists of the following 5 observations: 12, 10, 18, 18, 17. Test the claim that the population mean is less than 19, and give the 5 elements of the test. Assume normality if necessary.
When we test the hypothesis that the population proportions are equal, we can use the Z test for a one-sided as well as a two-sided alternative. Select one: a. False b. True C. Not sure
When data is said to be binomial, this means that ___________. a. They will always be normally distributed b. There are only 2 sets of data c. There are only 2 categories in which a measurement could possibly belong d. The data is classified into 2 or more categories
(c) Calculate the test statistic. d) Decide whether to reject or fail to reject the null hypothesis. Then interpret the decision in the context of the original claim.
Fill in the blanks please. a) It is often the case in practical applications that a normality assumption is not tenable. In these circumstances, it is desirable to base inference on tests that are valid over a wide range of distributions of the parent population. Such tests are called .............................. tests b) Of all possible estimators of α and β that are linear in the Yi and unbiased, the least squares estimators that have the smallest variances are said to be………………………….…………….……………………………. according to the …..………………………..……………… theorem thanks
Parametric Inferential Statistics
Which one of the following statements is false? O 4 statistical hypothesis is a statement about the parameters of one or more populations. T = has a t- distribution with n – 1 degrees of freedom. s/ n P(type I error) = P(reject H, when H, is true) Failing to reject the null hypothesis when it is false is defined as a type II error.
K ● ● Part 2 of 4 OC. Ho: μ> 13 µg/g H₁:μ13 μg/g Listed below are the lead concentrations in µg/g measured in different traditional medicines. Use a 0.05 significance level to test the claim that the mean lead concentration for all such medicines is less than 13 µg/g. Assume that the sample is a simple random sample. 3 16.5 3 19.5 5 6 22.5 19.5 2.5 9.5 Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? A. Ho: p=13 μg/g H₁:μ13 μg/g Determine the test statistic. (Round to two decimal places as needed.) iew an example Get more help points x Points: 0 of 1 (en OB. Ho: P=13 µg/g H₁:μ 13 µg/g D. Ho: μ-13 µg/g H₁: μ> 13 μg/g tv Clear all Save MA Check answer W rect:
Independent simple random samples are taken to conduct a simple comparative test of the means of two populations. The sample sizes are n1 = 20 and n2 = 30. It is assumed that the variances of the populations are equal and that the populations are normally distributed. Which is the appropriate statistical test? a. pooled variance t test b.paired t test c. separate variance t test d. independent samples z test Which of the following must be used? a. z distribution b. t distribution with how many degrees of freedom?