Which of the following best descibes "validity" in aquantitative research?a) the degree to which the inference drawn from ascore is accurateb) the degree to which your measure can bereplicated across multiple adminstrationsc) the maximum risk you are willing to take that yourresults are attriutable to chanced) the assumption that the majority of values orscores you obserce are located near the mean

In quantitative research, "validity" refers to the extent to which the results of a study accurately…

Answered: Which of the following best descibes…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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(Accept, fail to reject, reject), the null hypothesis. There (is not, is) suffienct evidence at the 0.05 significance level to, (warrant rejection of, support) their claim that the mean los Angeles commute time is less than 36 minutes. The sample mean is ___ minute(s), (greater than, less than), the claimed mean of 36 minutes; this difference, (is, is not) statistically significant by the standard of this test. identify the test statistic indetify the p value 306040459050901411045256015453045153420256010155456025202070251530301413027307052010302040601515602075202060259035151515703020451540301235103030356012060253050173015354015155012252530104515451030306020452025551520121048525453090302520301015504157403015451030120601020904530121045351260303071030106060353045103060104515301030103060301065520302030452045153015305351040453010403045302040141204025
Suppose you are asked to conduct a two-tailed hypothesis test on the population mean. What type of hypothesis test would you use? Why? What assumptions do you need to make about the process when you are conducting a hypothesis test on the population mean in order for your results to be valid?
The ___________ is a value used in making a decision about the null hypothesis and is found by converting the sample statistic to a score with the assumption that the null hypothesis is true.
Teacher Salaries. Data on salaries in the public school system are published annually in Ranking of the States and Estimates of School Statistics by the National Education Association. The mean annual salary of (public) classroom teachers is $55.4 thousand. A hypothesis test is to be performed to decide whether the mean annual salary of classroom teachers in Ohio is greater than the national mean. a. determine the null hypothesis. b. determine the alternative hypothesis. c. classify the hypothesis test as two tailed, left tailed, or right tailed.
In general terms, what is a hypothesis test? Are hypothesis tests based on descriptive statistics or inferential statistics? Is a t test an inferential statistic? a. Enter your response here.
In conducting a significance test, is it easier or harder to reject the null hypothesis when it's a two-tailed test instead of a one-tailed test? A: easier B: harder
If an experimenter realizes that the consequences of a type one error are severe, then he will most likely set the significance level of the test at 5% or possibly higher if the consequences are particularly troublesome a. true b. false
If a significance test gives p-value 0.005... A.. the effect of interest is practically significant B...We do have good evidence against the null hypothesis C...we do not have good evidence against the null hypothesis D...the null hypothesis is very likely to be true E.. The margin of error is 0.005
According to some car loan statistics, 44% of Americans are relying on an auto loan to pay for their cars. Assuming this finding to be based on a simple random sample of 1500 Americans, construct and interpret the 95% confidence interval for the population proportion of Americans who have a car loan.
A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.
a. What is the value of our sample statistic? b. What is the critical value for this level of confidence? c. What is the standard error of our sample statistic? d. What is the margin of error for this level of confidence? e. The 95% confidence interval for the true proportion of adult residents who have smartphones is between _____ and ______
Suppose a sample of 9 customers spends an average of $200 with a standard deviation $20 what is a 95% confidence interval for the sample mean. Use the fact that 95% of sample means are within 2.306 standard errors of the sample mean.

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