1. The following sample contains the number of chocolate chips in a sample of Chips Ahoy regular cookies. The mean is 21.4 chocolate chips and the standard deviation is about 3.4 chocolate chips. Construct a 99% confidence interval estimate of the mean number of chocolate chips in all such cookies. (21,20,16,25,20,26,19,24)

2. A 3M Privacy Filters poll in which 806 respondents were asked to identify their favorite seat when they fly and 61% chose the window seat. Create a 98% confidence interval estimate of the population proportion prefers the window seat.

3. A sociologist develops a test to measure attitudes about public transportation, and 29 randomly selected subjects are given the test. The sample variance of their score is 457.96 points. Construct 95% confidence interval estimate for the population standard deviation o and por population variance o^2

If 90° < θ < 180° and cotθ = -1/3, then cscθ =

You and three friends will be going out to eat at your favorite restaurant! each of you will order three items of your choice. you will also need to leave a tip. if you split the bill evenly among all four of you, how much will each person need to contribute? locate a menu for your favorite restaurant and pick three items for yourself and each friend. list the restaurant name, items, and prices in a table like the one below. in the column labeled subtotal, determine the cost of each person’s order. the customary tip is 20% of the total bill. in the column labeled tip, calculate the amount of tip each person should leave. in the column labeled total bill, determine the total of each person’s order, including the tip. restaurant name: names item 1 price item 2 price item 3 price subtotal tip total bill your name friend #1 friend #2 friend #3 part 2: questions answer the following questions, showing all work: what is the total cost of the entire bill (all four meals), including tip? write an expression using fractions to show how to determine the amount that each person will pay. then calculate each person's contributions showing all steps in long division. if each person paid an equal amount, who would save the most money? explain your reasoning using at least two complete sentences.

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?