Author Archives: Anonymous
This question is worth 2 points. You will use a statistical…
This question is worth 2 points. You will use a statistical program of your choice (Statcrunch, Excel, etc) to find the following: A fashion researcher who studies viral style trends is investigating the popularity of wearing socks with sandals on social media. She randomly selects a sample of 50 Instagram posts tagged with #sockandsandals and finds that, on average, each post received 1,850 likes, with a standard deviation of 470 likes. Construct a 95% confidence interval to estimate the true mean number of likes for Instagram posts featuring this trend. What is the lower bound? (It is sometimes referred to as the “lower limit) Round your answer to 2 decimal places.
Read DetailsAs part of a Master’s thesis project, a mathematics teacher…
As part of a Master’s thesis project, a mathematics teacher is interested in the effects of two different teaching methods on mathematics achievement. She randomly chooses one class of students to learn an algebraic concept using traditional methods and another class of students to learn the same algebraic concept using manipulatives. The teacher then compares their test scores. Determine whether the samples are dependent or independent.
Read DetailsA manufacturer claims that their machine can produce at leas…
A manufacturer claims that their machine can produce at least 100 widgets per hour. However, you suspect that the machine produces more than 100 widgets per hour on average. You want to test if the machine’s output is greater than 100 widgets per hour. Is this a left-tailed, right-tailed, or two-tailed test?
Read Details