Q11 According to the Ministry of Health national study among public hospitals, the  average mean of patient waiting time before consultation is 55 minutes. A random  sample of 25 patients was conducted with the findings indicated patients’ waiting  time is 60 minutes and standard deviation is 5 minutes. With the 5% significance  level and the data is assumed normal distribution, you as the public health  researcher is required to determine your hypothesis correctness that the sample  mean waiting time is less equal to 55 minutes. Use the critical value approach  method to answer it.

The mean age when smokers first start is 13 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS- electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 30 smokers found that their mean starting age was 12.2 years old. Do the data support the claim at the 1% significance level? What are the correct hypotheses? Ho: Select an answer v ? v years H3: Select an answer v years The test is: O One-tailed O Two-tailed

A shareholders' group is lodging a protest against your company. The shareholders group claimed that the mean tenure for a chief exective office (CEO) was different 10 years. A survey of 75 companies reported in The Wall Street Journal found a sample mean tenure of 8.1 years for CEOs with a standard deviation of s= 4.4 years (The Wall Street Journal, January 2, 2007). You don't know the population standard deviation but can assume it is normally distributed.You want to formulate and test a hypothesis that can be used to challenge the validity of the claim made by the group, at a significance level of α=0.001. Your hypotheses are:      Ho:μ=10      Ha:μ≠10What is the test statistic for this sample? test statistic = (Report answer accurate to 3 decimal places.)What is the p-value for this sample? p-value = (Report answer accurate to 4 decimal places.)The p-value is... less than (or equal to) α greater than α This test statistic leads to a decision to... reject the null accept the…

What is the verbal SAT score such that only 16% of admitted students had a higher score? Mean=660 Standard Deviation = 40

Total blood volume (in ml) per body weight is important in medical research. For healthy adults, the red blood cell volume mean is about 34 ml/kg. Red blood cell that is too low or too high can indicate a medical problem. Suppose that Roger has 20 blood tests and the mean is 35.4 ml/kg. Suppose that red blood cell volume follows normal distribution with standard deviation 2.34 ml/kg. With 5% significance level, test that the mean blood cell volume is different from 28ml/kg. Which test to use? a.) None of the answer choices b.) T-test for the Mean c.) T-test for Proportion   d.) Z-test for the Mean   e.) Z-test for Proportion

can someone please help me? I keep getting this wrong so if someone could explain that would help so much. Thanks!!     the t statistic test is -3.108 by the way!

Your research group has been hired to determine if college men and women drink different amounts of soft drinks at Illinois State University. After a careful study, your group has determined that males drink an average of 12 sodas per week with a standard deviation of 3.5 whereas female students drink an average of 9 soft drinks per week with a standard deviation of 2 sodas. The sample size of males is 200 and the sample size of females is 200. Based on this information, your group calculates the z-score to be: [____].

The mean age when smokers first start is 13 years old with a population standard deviation of 1.8 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS—electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 32 smokers found that their mean starting age was 12.4 years old. Do the data support the claim at the 1% significance level? What are the correct hypotheses? H0: Select an answer s² s p̂ x̄ σ p σ² μ  ? ≥ = > ≠ < ≤   yearsH1: Select an answer p s s² σ² μ σ p̂ x̄  ? ≤ = ≥ < ≠ >   years Based on the hypotheses, find the following: Test Statistic z =  (Give answer to at least 4 decimal places)Critical Values =±±  (Give answer to at least 4 decimal places) Based on the above we choose to Select an answer Accept the null hypothesis Accept the alternative hypotheis Fail to reject the null hypothesis Reject the null hypothesis  The correct summary would…

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