Aweb based software company is interested in estimating the proportion of individuals who use the firefox browser. in a sample of 200 of individuals, 20 users stated that they used firefox. using this data, construct a 99% confidence interval for the proportion of all individuals that use firefox. a) what is the lower limit on the 99% confidence interval? give your answer to three decimal places. 045 correct: your answer is correct. b) what is the upper limit on the 99% confidence interval? give your answer to three decimal places. 155 correct: your answer is correct. c) google states that the proportion of all individuals that use firefox is 0.2. based on the interval above, does the google claim seem reasonable? yes because 0.2 is inside the interval. no because 0.2 is not inside the interval. no because 0.2 is inside the interval. yes because 0.2 is not inside the interval. correct: your answer is correct. d) if you hadn't already taken the sample listed above, what sample size would be required so that the width of the 99% confidence interval would be at most 0.02 units wide? be as conservative as possible with your answer! 1493 incorrect: your answer is incorrect.

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?

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?

The function show two sisters' savings account and the rate at which they plan to deposit money