For the following conjecture, state the null and alternative hypotheses. The average age of attorneys is at least 25.4 years. The null hypothesis is Ho: The alternative hypothesis is H:

For each of the following hypotheses, identify which statistical test we could run in order to address the specific research question being asked. Your options are: z-Test, One-Sample t-Test, Independent-Samples t-Test, and Paired-Samples t-Test. Be sure to mention a bit about the research design to explain why you chose that specific test: 1) Do the Dodgers and Giants differ in the number of strikeouts they have per game? 2) Does our stats class differ from the national average in IQ? 3) Do people perform better or worse on a cognitive task after they eat cookies? 4) Do "only children" drive safer than other children with siblings? 5) Do people have more friends in college than they did in high school? 6) Do people experience higher levels of sadness or anger after a specific negative outcome?

Select the null and the alternative hypotheses for the following claims: a. “I am going to get the majority of the votes to win this election.”  multiple choice 1 H0: μ = 0.50; HA: μ ≠ 0.50 H0: p ≤ 0.50; HA: p > 0.50 H0: p ≥ 0.50; HA: p < 0.50  b. “I suspect that your 10-inch pizzas are, on average, less than 10 inches in size.”  multiple choice 2 H0: μ ≥ 10; HA: μ < 10 H0: p ≥ 10; HA: p < 10 H0: μ = 10; HA: μ ≠ 10  c. “I will have to fine the company since its tablets do not contain an average of 250 mg of ibuprofen as advertised.”  multiple choice 3 H0: μ = 250; HA: μ ≠ 250 H0: p ≤ 250; HA: p > 250 H0: p = 250; HA: p ≠ 250

A machine in a factory is supposed to fill vials with approximately 50mL of a liquid. The quality control manager wants to test whether the machine is working properly. If the machine is found to be over  or under-filling then the assembly line will need to be shut down so that it can be recalibrated. A. State the Null and Alternative hypothesis to the scenario using the correct symbols B. What would it mean to mean to make a Type 1 erryin this situation? C. What would it mean to make a Type 2 error in this situation? D. Why might it be worse toale a Type 1 error in this scenario? E. Suppose that we fail to reject the null hypothesis. Write a conclusion statement in the context of the problem. Assume no errors were made.

The solution for H0 or H1 was not given or explained in the expert solution provided.

For the following hypothesis tests, ONLY write out the type of test you would use and the hypotheses. You do not need to work out the test! 1. A magazine looks at how fast three smartphones can download a webpage (in seconds). the data is as follows: iPhone 2.4 1.4 3.2 2.7 1.5 4.3 2.2 Android 1.3 3.1 4.2 2.4 5.1 2.2 3.3 5.2 Galaxy 0.9 2.3 3.6 2.7 1.8 Can we say that there is a significant difference between these three phones? Type of Test: Hypotheses: 2. A study claims that a higher percentage of children in California suffer from allergies than children in Minnesota. You sample 19 Californian children, of whom 11 have allergies, and 28 children from Minnesota, of whom 13 have allergies. Is this enough evidence to show the study is correct? Type of Test: Hypotheses: 3. You read in the newspaper that the average age of the workers in the Biden campaign is 28.4 years old. You call the local Biden campaign office, sample 11 workers, and find the average age to be 25.4 years old, with a…

You watch people exiting Dodgers stadium after a game and you write down the number of males and the number of females that exit the stadium past you during the 20 minutes that you spend watching. You assumed that there would be a perfectly equal number of males and females attending a Dodgers game, but you look at the number of males and females that you actually counted, and you see if you still think that is actually true. What kind of hypothesis test would allow you to do this? a. One-Factor, Independent-Measures ANOVA b. Two-Factor ANOVA c. Correlation/Regression d. Chi-Square Goodness of Fit

A hospital claims that the proportion of full-term babies born in the hospital who weigh less than seven pounds is no more than 42%. Suppose that we want to carry out the hypothesis test for this claim, suspecting otherwise. State the null hypothesis H0 and the alternative hypothesis H1 that we would use for this test.