Apoint estimate of a population parameter θis a single number that can be regarded as a sensible value of θ. b. a point estimate of a population parameter θis obtained by selecting a suitable statistic and computing its value from the given sample data. the selected statistic is called the point estimator of θ. c. the sample mean xis a point estimator of the population mean µ. d. the sample variance 2sis a point estimator of the population variance 2σ. e. all of the above statements are true.

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?

Common binomial factor of 6x(3x+7)+5(3x+7)

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?