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Prof Rea’s Exam Question 4. Show as much work as possible and clearly show all four steps of a hypothesis test to earn credit: Last year, researchers determined that adults in the US spent an average of 152 minutes on social media per day. You wonder if the amount of time people have been spending on social media has increased since last year. You randomly survey 120 adults in the US and find that they spend an average of 145 minutes on social media per day. You compute the sample standard deviation to be 35 minutes. Test your claim using a 5% level of significance. Round all calculated values to three decimal places.

Exam Question 4 IQ is normally distributed with a mean of 110 points and a standard deviation of 13 points. Einstein’s IQ is 3.8 standard deviations above the mean. What is Einstein’s IQ? Is it unusual? Explain how and why or why not. Find the proportion of people with an IQ of at most 130. Write probability notation in your answer and write the desmos function you used to do the calculation. Round Z-scores to two decimal places. Round your answer to three decimal places. Alfred wants to know the IQ’s of the people who encompass the middle 60% of the population. His solution is below. Describe two errors he made and explain to him how to fix them.

Which of the following cell release histamines and involves in the inflammatory response?

Which of the following cell is involved in resistance to parasitic helminths?

An injection of “naked” DNA into muscle cells to induce an immune response against the proteins encoded by the DNA is an example of a subunit vaccine.

A reaction between an antibody and soluble antigen-forming lattices is called a(n) ____________________.

The cells responsible for the production of circulating antibodies are cytotoxic T cells. 

When an antibody binds to a toxin, the resulting action is referred to as _______________.

This step in the risk assessment will identify and describe the population exposed, and determine where and how the exposure occurs.

This individual determined the link between cholera cases and a London water pump in 1854.