Blog

(06.06 MC)  Total points in a board game based on the average number of hours played is predicted using the least-square regression line, ŷ = 280.3 + 85.7x, where ŷ represents the total points scored and x represents the average number of hours spent playing the game. A player plays the game for an average of 3 hours and has a point total of 550. What is the residual for the player? (3 points)

(05.01 LC)  Tiara, a quality assurance inspector at a chocolate factory, checks for product quality using a random sample of 18 pieces of chocolate from a batch of 60, with 17 white chocolates and 43 dark chocolates. Let p̂ be the proportion of white chocolates in the sample. Part A: Is the 10% condition met in this case? Justify your answer. (5 points) Part B: Is the Normal condition met in this case? Justify your answer. (5 points) (10 points)

Which of the following is true regarding E-cigarette use:

Evaluate the function f (x) = 8x 2 + 9x – 3 at f (9). ​

(05.04 MC)  Two opposing opinions were shown to a random sample of 1,744 US buyers of a particular political news app. The opinions, shown in a random order to each buyer, were as follows:Opinion A: Prescription drug regulation is more important than border security.Opinion B: Border security is more important than prescription drug regulation. Buyers were to choose the opinion that most closely reflected their own. If they felt neutral on the topics, they were to choose a third option of “Neutral.”The outcomes were as follows:30% chose Opinion A, 64% chose Opinion B, and 6% chose “Neutral.”Part A: Create and interpret a 95% confidence interval for the proportion of all US buyers who would have chosen Opinion A. (5 points)Part B: The number of buyers that chose Opinion A and the number of buyers that did not choose Opinion A are both greater than 10. Why must this inference condition be met? (5 points) (10 points)

(05.04 MC)  A researcher has conducted a survey using a simple random sample of 500 golf club members to create a confidence interval to estimate the proportion of golf club members favoring a 1% annual increase in dues to remodel the clubhouse. Assume that the sample proportion does not change. The researcher now decides to survey a random sample of 125 people instead of 500 golf club members. Which of the following statements best describes how the confidence interval is affected by this change? (3 points)

When aligning the body in a neutral spine position which of the following cue should not be followed?  

(05.02 LC)  The Central Limit Theorem says that when sample size n is taken from any population with mean μ and standard deviation σ when n is large, which of the following statements are true? (4 points) The distribution of the sample mean is approximately Normal. The standard deviation is equal to that of the population. The distribution of the population is exactly Normal. The distribution is biased.

According to the article on overuse injuries, posted by your peer, which of the following puts a child at risk for overuse injury:

For each of the following equilibrium constants, indicate whether you would expect      an equilibrium reaction to be dominated by reactants, to be dominated by products, or to contain significant amounts of both.          (a) KC   =   95.7                                       (b) KC   =   5 x 10-3