In a study of 788 randomly selected medical malpractice​ lawsuits, it was found that 504 of them were dropped or dismissed. Use a 0.01 significance level to test the claim that most medical malpractice lawsuits are dropped or dismissed. What is the test​ statistic Determine P-value

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The accompanying table shows the results of challenged referee calls in a major tennis tournament. Use a 0.05 significance level to test the claim that the gender of the tennis player is independent of whether a call is overturned. Using stat crunch find the test statistics and p-value. Thank You Was the Challenge to the Call​ Successful?     Yes No   Men 407   687   Women 257   783

Conduct the hypothesis test and provide the test statistic and the critical​ value, and state the conclusion.   A person randomly selected 100100 checks and recorded the cents portions of those checks. The table below lists those cents portions categorized according to the indicated values. Use a 0.050.05 significance level to test the claim that the four categories are equally likely. The person expected that many checks for whole dollar amounts would result in a disproportionately high frequency for the first​ category, but do the results support that​ expectation?   Cents portion of check ​0-24 ​25-49 ​50-74 ​75-99   Number 3131 2424 2020 2525     Click here to view the chi-square distribution table. LOADING...       Question content area bottom Part 1 The test statistic is enter your response here. ​(Round to three decimal places as​ needed.) Part 2 The critical value is enter your response here. ​(Round to three decimal places as​…

It was claimed recently that more than 55% of high school students in the United States use computers for educational purposes. We wish to examine this claim. We choose a random sample of 225 U.S. high school students and find that 140 of these students use computers for educational purposes. Based on this, can we conclude, at the 0.05 level of significance, that more than 55% of high school students in the United States use computers for educational purposes? In your answers, denote the proportion of all U.S. high school students who happen to use computers for educational purposes by p. State the null hypothesis H0 and the alternative hypothesis H1 Find the z-test value find the critical value Can we conclude that more than 55% of high school students in the United States use computers for educational purposes? Yes or No?

Every year during home football games the Carroll College fans do push-up contests to see how many they can do. Suppose that a curious stats student in the stands kept track of the number of push-ups completed for several students of both genders. 0.05 significance level to test the claim  Males 25 13 31 23 27 17 27 31 24 18 Females 15 8 15 13 5 23 25 8 30 3 (a) What is the test statistic? ________ (b) Construct a 95% confidence interval fro the mean of the differences between males and females.  __________< u < _________

The dataset "nurses" is a random sample of 1,000 cases from “Health Care Provider Credential Data” from Washington State Open Data Portal. In the sample, there are 418 CNA's and 278 of the CNA's have expired credentials. Use the statistics from the nurses dataset to answer the following question: "With 90% confidence, what percent of all CNA's on Washington State's healthcare provider list are expired?"