o a recent​ survey, 74​% of college students did not use student loans to pay for college. Let p be the proportion of college students who did not use student loans to pay for c

Let a, b > 0. Show that the geometric mean ,Jab is not larger than the arithmetic mean (a+ b)/2. Hint: Consider (a 1/2 - b 1/2)2.

Suppose z is the standard normal variable. It is suggested that you draw the normal curve for each of the following probability statements to visualize the required area. Report answers accurate to at least 4 decimal places.

In a random sample of seven people, the mean driving distance to work was 22.5 miles and the standard deviation was 5.9 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 95% confidence interval for the population mean. (Round to one decimal place as needed.) Interpret the results. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. With % confidence, it can be said that most driving distances to work (in miles) in the population are between the interval's endpoints. O B. It can be said that % of the population has a driving distance to work (in miles) that is between the interval's endpoints. OC. With % confidence, it can be said that the population mean driving distance to work…

A realtor is displaying the histogram below, which summarizes the percentage appreciation in value (over the past five years) for each of a random sample of 25 houses in Newburg Park. Relative frequency 0.4 0.32 03- 0.2 0.2 0.2 016 0.12 0.1 10 20 40 Appreciation (in percent) Based on the histogram, draw the ogive (the ccumulative relative frequency polygon) for the sample data. Cumulative relative froquency 0.6 0.4 02 0.00 0.00 [0.00 T0.00 0.0 10 20 30 40 30 Appreciation (in percent)

Explain the power of the test in words, in context. In the answer options below I have used the word “certain” because I don’t want to give away exactly what type of relationship it is.

Some states now allow online gambling. As a marketing manager for a casino, you need to determine the percentage of adults in those states who gamble online. How many adults must you survey in order to be 90% confident that your estimate is in error by no more than one percentage point? Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of adults who gamble online. n=0 (Round up to the nearest integer.) b. Assume that 18% of all adults gamble online. n= (Round up to the nearest integer.)

ind the number of successes x suggested by the given​ statement:   From a​ CNN/USA Today/Gallup​ poll: Among 1299   survey​ subjects, 13.7 ​% say that the opinion of a celebrity would influence their own opinion. x​ = nothing   ​(round off to a whole​ number)

A survey was done where one question asked of the participants was, “How many meals per week do you typically eat at a restaurant”.  The numerical answers ranged from a low of 0 to a high of 12.  How could you ask a question that would treat this as a categorical variable?  Give the question and give the choices for the answer.