1. If we had made an error when determining if my students were on average taller...

1. If we had made an error when determining if my students were on average taller than I am, which type would it have been? Write out in words, in context, what making such an error would mean.

3. Hypothesis Test A had a P-value of 0.0034. Hypothesis Test B had a P-value of 0.034. Which test showed stronger evidence against its null hypothesis, Test A or Test B?

4. What is the smallest significance level at which you would reject the null hypothesis in a P-value approach hypothesis test?

5. True/False? If the alternative hypothesis was “the population mean is greater than 10”, then we would reject the null hypothesis when the P-value is greater than the significance level (alpha).

Expert Solution

1.In the situation for coming to a conclusion about tall or short a relative concept, arithmentic mean is not appropriate. Here we must use median test becuase arithmetic mean is influenced by extreme values . So, by getting error we increase chance of type 1 error.

3.Hypothesis Test A had a P-value of 0.0034. Hypothesis Test B had a P-value of 0.034. Both values are less than prescribed value 0.05. But more small the p-value, more stronger evidence against null hypothesis. So, Hypothesis A showed stronger evidence against its null hypothesis.

4The convention in most research is to use a significance level of 0.05. This means that if the P value is less than 0.05, you reject the null hypothesis; if P is greater than or equal to 0.05, you don't reject the null hypothesis

5.False. p-value greater than 0.05 leads to accept null hypothesis.

orchestra answered 2 years ago

In this exercise, we examine the effect of the margin of error on determining the sample...

In this exercise, we examine the effect of the margin of error on determining the sample size needed. Find the sample size needed to give, with 99% confidence, a margin of error within ±7. Within ±3. Within ±1. Assume that we use σ˜=20 as our estimate of the standard deviation in each case. Round your answers up to the nearest integer. ME=7 : n= ? ME=3 : n= ? ME=1 : n= ?

Last semester, the students in my Finite Math class had an average quiz score of 83...

Last semester, the students in my Finite Math class had an average quiz score of 83 with a standard deviation of 2. Assume that the scores are approximated by a normal distribution. a) What percent of students scored higher than an 86 on the quiz? b) What percent of students scored less than a 79 on the quiz? c) What percent of students scored between a 79 and an 86? d) What happens when you try to find the percent...

QUESTION 1 A Type II error occurs when we ________. reject the null hypothesis when it...

QUESTION 1 A Type II error occurs when we ________. reject the null hypothesis when it is actually true reject the null hypothesis when it is actually false do not reject the null hypothesis when it is actually false do not reject the null hypothesis when it is actually true QUESTION 2 A lower level of significance makes it harder to reject the null hypothesis. True False QUESTION 3 A professional sports organization is going to implement a test for...

When I was suffering from a lot of phlegm in my throat, one of my students...

When I was suffering from a lot of phlegm in my throat, one of my students recommended I take a shot of apple cider vinegar, which was quite sour. The transduction process that enabled me to taste it was initiated by A. sodium ions traversing the apical plasma membrane of my taste cells. B. protons traversing the apical plasma membrane of my taste cells. C. calcium-mediated activation of voltage-gated Na+ channels. D. calcium-mediated activation of Cl- channels.

1. We know that average _ cost is when marginal cost is less than average...

1. We know that average _______ cost is ______ when marginal cost is less than average total cost. variable; rising fixed; rising total; falling total; rising 2. In the short run, if a company shuts down, which of the following will happen? Total revenue will be zero, but total fixed costs will still have to be paid. Total revenue will be zero, and total costs will be zero. Total economic profit will be zero, and total costs will be positive....

While preparing the bank reconciliation, an accountant with Elliter noticed that an error had been made...

While preparing the bank reconciliation, an accountant with Elliter noticed that an error had been made in recording a deposit received by the company. The receipt had been recorded by the company as $729 yet the correct amount of the deposit on the bank statement was $279. Which of the following reconciling adjustments is necessary? 1. Deduct $450 from the bank statement balance 2. Add $450 to the bank statement balance 3. Add $450 to the company's records 4. Deduct...

1. Describe an example of a decision you've made when you had to weigh the marginal...

1. Describe an example of a decision you've made when you had to weigh the marginal cost and marginal benefit of the choice.

In my lab we found OUR average molarity to be 0.83334 M, but we used 3%...

In my lab we found OUR average molarity to be 0.83334 M, but we used 3% H2O2 (hydrogen peroxide), so I'm not sure how to do this or what numbers to even use. 7. Convert the average molarity of hydrogen peroxide into % (wt) of hydrogen peroxide (the density of the solution = 1.009g/ml). 8. Comparing the above calculated % of hydrogen peroxide with the known (labeled on the bottle) value, calculate the % experimental error.

Students performing vinegar analyses made several mistakes in their experiments. Explain in detail how each error...

Students performing vinegar analyses made several mistakes in their experiments. Explain in detail how each error below will affect the final result (% weight of acetic acid in vinegar) of each student's experiment. Show all steps of logic followed in analyzing the effects of the mistake (remember that the experiment had two parts): 1.Student A used a wet beaker to transfer the NaOH solution to be standardized from its original container to the buret. 2.Student B did not fill the...

1. A Type I error occurs when we: A. reject a true null hypothesis B. reject...

1. A Type I error occurs when we: A. reject a true null hypothesis B. reject a false null hypothesis C. do not reject a false null hypothesis D. do not reject a true null hypothesis 2. Whenever the null hypothesis is not rejected, the alternative hypothesis: A. is true B. must be modified C. is rejected D. is not rejected

Question