In a sample of 12 participants, a researcher estimates the 80% ci for a sample with a mean of m = 22.3 and an estimated standard error (sm) of 4.7. what is the confidence interval at this level of confidence? 80% ci 12.1, 32.5 80% ci 17.6, 27.0 80% ci 15.9, 28.7 there is not enough information to answer this question.

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?