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- When determining whether grounding accidents and hull failures result in different spillage (is there a difference between spills caused by grounding or hull failures) would I use a two tail t test to decide this?A one sample hypothesis test examines whether a sample significantly differs from a population. However, in “real” life, we rarely know the descriptive statistics of a population, which is why we do inferential statistics. Because we don’t have access to a data set that has information for a population, in the lab we are going to make a few assumptions in order to review one-sample hypothesis testing. One-Sample Hypothesis Testing Let’s assume that the United States population is evenly split; so exactly half of the U.S. are men and the other half of the U.S. are women. In SPSS, the variable sex has been coded as 1=male, 2=female. Recode it so that it equals 1=female, 0=male. Then, this variable’s mean can be interpreted as a proportion. Therefore, if we were to poll the entire U.S. population, we would expect a population mean of around .5, or 50% female. Is there a significant difference between the gender representation in our 2018 GSS sample and our hypothetical U.S. population?…14.) Using a sample to compute a __________ as a proxy for a parameter is generally called point estimation and is a form of statistical inference.
- What is the decision making for this hypothesis test? A is the positive critical value for this question, what is/are the possible critical region(s) for this hypothesis test? A. Greater than -A and smaller than A B. Greater than A or smaller than -A C. Greater than A D. None of the above E. Smaller than -AA student majoring in Management who has passed the Business Statistics course suspects that the average price of lunch at the canteen has increased during the pandemic. Before the pandemic, the price for lunch he paid was $21, $22, $22.50, $23, $23.50. After the pandemic, he paid $25, $25.50, $30, $27, and $26.50. a) Perform a hypothesis test analysis to find out whether there has been an average increase in the price of lunch (Use six Hypothesis Testing Steps) ! b) Interpret (and explain) the results of point a above!A quality control inspector needs to know if customers are getting fewer ounces of a soft drink than the 28 ounces stated on the label. After the inspector collects data, she is going to conduct a hypothesis test. She should use A. A two-tailed test. B. A one-tailed test with the rejection region on the right tail. C. A one-tailed test with the rejection region on the left tail. D. Either a one-tailed or a two-tailed test. Clear selection
- The mean IQ of statistics teachers is greater than 130. Identify the type I and type II errors for the hypothesis test of this claim. Rejecting or failing to reject Ho: μ ≤ 130 when μ ≤ 130 Rejecting or failing to reject Ho: μ ≤ 130 when μ > 130A mobile phone manufacturer buys mobile phone batteries in batches of 500 pieces from the factory that manufactures batteries. In accordance with the quality control procedures, 2% of the lot is randomly selected, if 30% or less of the batteries in this sample are found to be defective, the party is accepted, otherwise it is rejected. a)Calculate the acceptance probabilities of the lot for cases where the defective percentage is 3%, 8%, 15%, 25% and 40%. b)Plot the OC curve. c)If the producer risk is 7%, find and interpret the acceptable quality level. d)If the consumer risk is 35%, find the level of refusable quality and interpret. e)Show the acceptable quality level and the rejected quality level on the OC curve.Applying the Concepts and SkillsIn Exercises, perform a Kruskal–Wallis test by using either the critical-value approach or the P-value approach.TV-Commercial Placement. In the article “Violence and Sex Impair Memory for Television Ads” (Journal of Applied Psychology, Vol. 87, No. 3, pp. 557–564), B. Bushman and A. Bonacci studied whether the type of television program in which commercials are placed affects a viewer’s ability to remember the product. Participants watched a violent, sexually explicit, or neutral TV program that contained nine advertisements. The next day, participants were asked to recall the advertised brands. The number of brands the participants were able to recall are presented in the following table. Violent Sexually explict Neutral 0 0 4 0 2 1.000 2 2 2 1 2 3 1 0 2 0 1 7 At the 5% significance level, do the data provide sufficient evidence to conclude that a difference exists in the median number of advertised brands a viewer is able to recall…
- Please explain how to prove this using these definitions. NOTE: I’m NOT looking to prove that the expected value of z is 0 and the variance of z is 1.Test the hypothesis that the average weekly allowance of female and male ACC 215 students the same, at 5% level of significance. Weekly Allowance of Students (Php) Male: 1500 2000 2500 2500 2000 1750 2000 1800 Female:1500 2000 1750 1500 2000 2500 3000 3500 Ho: Ha: α = Decision Rule: Computation: Decision: Conclusion:
