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The p-value for a two-sided test of the null hypothesis H0: μ = 10 is 0.06.(a) Would a 95% confidence interval for μ include the value 10? Why?(b) Would a 90% confidence interval for μ include the value 10? Why?
General
6 months ago
The 3 × 3 matrix P satisfies the matrix equation P^2 = P.(a) What are the possibilities for the determinant of P?(b) Explain why there are no other possibilities.(c) For each possible determinant, give an example of P with that determinant.
General
6 months ago
Find the x-coordinates of all critical points of the given function. Determine whether each critical point is a relative maximum, minimum, or neither by first applying the second derivative test, and, if the test fails, by some other method. f(x) = 5x4 − 2x3
General
6 months ago
The monthly starting salaries of students who receive an MBA degree have a population standard deviation of $120. What sample size should be selected to obtain a .95 probability of estimating the population mean monthly income within a margin of $20? [sample size]
General
6 months ago
After checking to ensure that the sample data follows the necessary condition for using the t-procedure, we use Minitab to get a 90% confidence interval to estimate mu. We find it to be (118.51 ounces, 124.29 ounces). What does this interval tell us?
General
6 months ago
A survey is taken among customers of a fast-food restaurant to determine preference for hamburger or chicken. Of 200 respondents selected, 75 were children and 125 were adults. 120 preferred hamburger and 80 preferred chickens. 55 of the children preferred hamburger and 20 preferred chickens. Set up a 2x2 contingency table using this information and answer the following questions:FoodAge Hamburger Chicken TotalChild 55 20 75Adult 65 60 125Total 120 80 200a) What is the probability that a randomly selected individual is an adult?b) What is the probability that a randomly selected individual is a child and prefers chicken?c) Given the person is a child, what is the probability that this child prefers a hamburger?d) Assume we know that a person has ordered chicken, what is the probability that this individual is an adult?
General
6 months ago
Abscissa is: a. the first number (or x value) of an ordered pair coordinate plane b. a way of locating points in a plane that consists of a horizontal and a vertical number line intersecting at the zeros coordinates c. an ordered pair, (x, y), that describes the location of a point in the coordinate plane ordinate d. the second number (or y-value) of an ordered pair origin e. the point of intersection, (0, 0), of the axes in the coordinate plane quadrant f. region in the coordinate plane x-axis g. the horizontal axis in the coordinate plane y-axis h. the vertical axis in the coordinate plane
General
6 months ago
In a triangle ABC, measure of angle B is 90 degrees. AB is 3x-2 units and BC is x+3. If the area of the triangle is 17 sq cm, form an equation in terms of x and solve it.
General
6 months ago
Thomas borrowed 4800$ to buy a new car. He will be paying 96$ a each month for the next 60 months. Find the simple interest rate for his car loan.
General
6 months ago
The probability of rolling a fair die and not getting an outcome less than 3 is
General
6 months ago
Please help! :) Need answer fast!
General
6 months ago
For a scientific Experiment, A physicist must make sure that the temperature of a metal at 0°C gets to no colder than -80°C. the physicist changes the metals temperature at a steady rate of -4°C per hour. Let t represent the temperature in degrees Celsius. Write an inequality. use the fact that the rate of change in temperature times the number of hours equals the final temperature.
General
6 months ago
George has 1/3 pan of brownies.He eats 1/4 of them.What fraction did George eat?
General
6 months ago
A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knowsthat some proportion of these spare parts will have deteriorated to the point where they are no longerusable. In order to estimate this proportion, the firm tests 75 parts, and finds that 0.25 of them are notusable. Find the 95% confidence interval for the population proportion of parts that are not usable. a. 0.25(1 0.25) 0.25(1 0.25) C 0.25 1.96 p 0.25 1.96 0.95 75 75 b. 0.25(1 0.25) 0.25(1 0.25) C 0.25 1.96 p 0.25 1.96 0.95 75 75c. 0.25(1 0.25) 0.25(1 0.25) C 0.25 1.645 p 0.25 1.645 0.95 75 75 d. 0.25(1 0.25) 0.25(1 0.25) C 0.25 1.645 p 0.25 1.645 0.95 75 75
General
6 months ago
Suppose that a manager is interested in estimating the average amount of money customers spend in her store. After sampling 36 transactions at random, she found that the average amount spent was $35.25. She then computed a 95% confidence interval to be between $31.84 and $38.66. Which statement gives a valid interpretation of the interval? The store manager is 95% confident that the average amount spent by the 36 sampled customers is between S31.84 and $38.66. There is a 95% chance that the mean amount spent by all customers is between $31.84 and $38.66. O There is a 95% chance that a randomly selected customer will spend between $31.84 and $38.66. The store manager is 95% confident that the average amount spent by all customers is between $31.84 and S3866
General
6 months ago
In a survey of 269 college students, it is found that69 like brussels sprouts,90 like broccoli,59 like cauliflower,28 like both Brussels sprouts and broccoli,20 like both Brussels sprouts and cauliflower,24 like both broccoli and cauliflower, and10 of the students like all three vegetables.a) How many of the 269 college students do not like any of these three vegetables?b) How many like broccoli only?c) How many like broccoli AND cauliflower but not Brussels sprouts?d) How many like neither Brussels sprouts nor cauliflower?
General
6 months ago
You read that a study is planned for which a test of hypothesis will be done at significance level α = 0.10. Statisticians have calculated that for a certain effect size, the power is 0.7. What are the probabilities of Type I and Type II errors for this test?
General
6 months ago
Jada bought $53 worth of snacks. She used a 10% off coupon. She then paid 8% tax on the original amount. What is the total she paid after the discount and tax?
General
6 months ago
Two concentric spheres have radi of 5" and 6". Find the volume of the space between them.
General
6 months ago
What percent of 9 is 8.46
General
6 months ago
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