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A dermatologist will conduct an experiment to investigate the effectiveness of a new drug to treat acne. The dermatologist has recruited 36 pairs of identical twins. Each person in the experiment has acne and each person inthe experiment will receive either the new drug or a placebo. After each person in the experiment uses either the new drug or the placebo for 2 weeks, the dermatologist will evaluate the improvement in acne severity for each person on a scale from 0 (no improvement) to 100 (complete cure).  Identify the treatments [Blank1] experimental units [Blank2] response variable of the experiment [Blank3]   I will grade manaully.

Identify which type of sampling is used. A school wants to survey student opinions on a new school policy. They have a list of all students (the population). They assign each student a number, generate random numbers, and select students whose numbers match the generated random numbers.

A Washington DC tour company gives tours all year and offers a Weekend tour and a 7-Day tour. The table below shows the number of customers by season and by length of tour.   Spring Summer Winter Fall Total Weekend 68 194 97 46 405 7-Day 18 52 40 15 125 Total 86 246 137 61 530 Answer the following and present your answer as a proportion rounded to 3 decimals.  example 61/530 = .115 or 0.115. A.  Find the Joint probability for customers who book a weekend tour in the winter. [response1] B. Find the marginal probability that customers book a 7 day tour in the summer. [response2] C. What is the probability that a customer books a weekend tour given it is spring?  [response3]    

Correlation does not imply ________.

  I am interested in finding out how much time the typical college student spends on Snapchat. How should I collect my data?     a.  Select a sample from the population of college students.   b.  Select a population from the sample of college students.   c.  Conduct a census of all college students.   d.  None of the above

Researchers collect data by interviewing athletes who have won Olympic gold medals from 1992 to 2016. Identify the type of data

The volume of a sample of gas, initially at 25 °C and 158 mL, increases to 450. mL. What is the final temperature of the sample of gas, if the pressure and amount of gas in the container is kept constant?

What is the name of Cr(NO3)3 ?

The strongest interactions between molecules of ammonia, NH3, are

The VSEPR theory allows us to determine the most favorable