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Statistics

Date Posted: 02/10/2021
Category: Math
Due Date: 02/10/2021
Instruction
All sourced information must be accompanied by at least 3-4 lines of student-written, original text, explaining each line of quoted content. Quoted, summarized, or paraphrased material, derived from a source must always be cited/referenced. Properly credit the author per APA citation guidelines both in-text and as a reference at the end of the response. Question 1 In July 2010, a survey conducted by Webroot, a software security firm, found that 32% of the respondents use the same password for all of the social networking web sites they log on to (which, by the way, is not the best idea). Suppose a follow-up survey was conducted in late 2010 to investigate if the proportion had changed. Out of a random sample of 225 Internet users, it was found that 86 used the same password for all their social networking web sites. State the null and alternative hypothesis. Question 2 Explain the difference between convenience, non-probability, probability, stratified, clustered, and systematic samples. Write a multi-paragraph response. Question 3 What is the difference between a point estimate and an interval estimate? Question 4 What is the difference between a one- and two-tail hypothesis test on a population? Question 5 What is the difference between systematic and stratified samples? Question 6 How can survey questions lead to non-sampling errors? Question 7 GMAC reported that 85% of drivers incorrectly answered a question asking them what they are supposed to do when approaching a yellow light. To verify this surprising result, 330 drivers in a random sample were asked the same question. From this sample, 274 answered incorrectly. Using a 90% confidence interval, are the results reported by GMAC validated? Question 8 One of Super Giant’s grocery stores in Pennsylvania sells, on average, 1120 cases of Pepsi products a week with a standard deviation of 146 cases. Josh Nelson, who is the Pepsi account manager for this store, receives a bonus if the store’s weekly sales over a four-week period during the month average more than 1200 cases. What is the probability that Josh will receive a bonus next month? Question 9 What is the p-value equivalent to with regards to hypothesis testing? Select one: a. Alternate hypothesis b. Null hypothesis c. Critical value d. Observed level of significance Question 10 What is meant by a 90% confidence level?
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    Euphrates | Oct 02, 2021, 06:01 AM
  • Hi can you please make sure there is no plagerism. thank you
    User_30083 | Oct 02, 2021, 06:31 AM
  • No problem. Thanks
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  • Hello I forgot one question.
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  • What is meant by the “power of the hypothesis test,” 1 –β?
    User_30083 | Oct 04, 2021, 04:19 AM
  • Hi. Probability of rejecting the null hypothesis when it's false
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