Mathematics, 15.04.2020 04:49, alessandrotabares
Suppose that a restaurant launched a new advertising campaign in conjunction with a new menu. After one month they take a random sample of 250 bills (tables) and find an average bill of 73.4. In that sample they also find the standard deviation is 38.6. Conduct a hypothesis test to determine whether the new campaign and menu have increased the average bill above the previous average of 71.6. Hint, the null hypothesis is that mu<=71.6 and we assume that the standard deviation is unknown so we use the estimate of 38.6 from the sample. What is the test statistic? Answer to three decimal places. (Remember that when a value for alpha is not explicitly stated in this class then you can assume it is .05; use alpha=.05 in this problem.)
Answers: 3
Mathematics, 20.06.2019 18:04, genyjoannerubiera
30 points! i am confused. what does it mean by game time? you can use a table of random numbers or a random number generator to create random samples. also, you can obtain random samples directly using wolframalpha. com. for example, typing in randomsample[{1,2,3,4,5},2] will give you a sample of size 2 from the list {1,2,3,4,5}. a sample result is {1,5}. refreshing the page will generate a new random sample of size 2. 2. create five random samples of size two from the population. record the game times for the samples and calculate the mean game time of each sample. 3. create 5 random samples of size 11 from the population. record the game times for the samples and calculate the mean game time of each sample.
Answers: 2
Mathematics, 22.06.2019 01:10, hellicuh
Evaluate 8x2 + 9x β 1 2x3 + 3x2 β 2x dx. solution since the degree of the numerator is less than the degree of the denominator, we don't need to divide. we factor the denominator as 2x3 + 3x2 β 2x = x(2x2 + 3x β 2) = x(2x β 1)(x + 2). since the denominator has three distinct linear factors, the partial fraction decomposition of the integrand has the formβ 8x2 + 9x β 1 x(2x β 1)(x + 2) = correct: your answer is correct. to determine the values of a, b, and c, we multiply both sides of this equation by the product of the denominators, x(2x β 1)(x + 2), obtaining 8x2 + 9x β 1 = a correct: your answer is correct. (x + 2) + bx(x + 2) + cx(2x β 1).
Answers: 3
Mathematics, 22.06.2019 02:00, nininichole431
Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?
Answers: 2
Suppose that a restaurant launched a new advertising campaign in conjunction with a new menu. After...
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