The histogram shows the ages years) of 25 customers that were in the freezer aisle at a large grocery store. Check the assumptions and conditions for an inference using Student's t-modelWhich assumptions and conditions are satisfied by the sample?▼satisfied.The Independence Assumption.The Randomization Condition.satisfied.The 10% Condition ▼satisfied.The Nearly Normal Conditionsatisfied.Number of customers15 30 45QQG

A histogram gives an idea of the distribution of the data.

Answered: The histogram shows the ages years) of…

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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When a person states at the outset of an experiment that a higher average score will be received by a group receiving some kind of treatment when it is compared to the mean of a group that did not receive the treatment, the need for a _________________ is apparent. a. one-tailed test b. two-tailed test c. an independent groups test d. a matched groups test
Carefully explain the steps for this question
An online retailer would like to know whether the proportion of customers who visit the site and make a purchase is different than 50%. A simple random sample of customers is taken. The results of the sample are shown below.
Eighty-three percent of adults in a certain country believe that life on other planets is plausible. You randomly select five adults and ask them whether they believe that life on other planets is plausible. The random variable represents the number of adults who believe that life on other planets is plausible. Find the mean, variance, and standard deviation of the binomial distribution for the random variable. Interpret the results find the mean, variance, and standard deviation
Data Management - Organization of Data for analysis
Textbook question for practise - A behavioural psychologist has developed a cognitive-behavioural therapy (CBT) technique modified from classic systematic desensitization to reduce her patients’ phobia of spiders. She decides to test the effectiveness of her new therapy approach by selecting ten patients at random to undergo the treatment for 3 months. The patients were asked to rate how much fear they feel/experience when in the presence of a spider/spiders using a scale from 0 (no fear at all) to 100 (extreme panic and fear). They were tested before and after the therapy. The ratings for each patient are as follows: For this question, be sure to do the following: ▪ State the statistical hypotheses (using the appropriate notation). ▪ Indicate whether the research hypothesis is non-directional or directional (and how you know). ▪ Set the decision rules, which will include: o State alpha - 0.05% o Compute the degrees of freedom o Providing the critical value for the test statistic…
Unbiased Sample? Suppose you attend a school that offers both traditional courses and online courses. You want to know the average age of all the students. You walk around campus asking those students that you meet how old they are. Would this result in an unbiased sample?
Statistics students believe that the mean score on the first statistics test is 65. Astatistics instructor thinks the mean score is lower than 65. He randomly samples 10statistics student scores and obtains the scores [62, 54, 64, 58, 70, 67, 63, 59, 69, 64].He performs a hypothesis test using a 5% level of significance. Draw the graph of thenormal distribution showing the rejection region & indicate your calculated value. Statethe null and alternative hypothesis.

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