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A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 447 gram setting. It is believed that the machine is underfilling the bags. A 19 bag sample had a mean of 443 grams with a standard deviation of 21. A level of significance of 0.025 will be used. Assume the population distribution is approximately normal. Determine the decision rule for rejecting the null hypothesis. Round your answer to three decimal places.
General
3 months ago
According to the National Association of Realtors, it took an average of three weeks to sell a home in 2017. Suppose data for the sale of 39 randomly selected homes sold in Greene County, Ohio, in 2017 showed a sample mean of 3.6 weeks with a sample standard deviation of 2 weeks. Conduct a hypothesis test to determine whether the number of weeks until a house sold in Greene County differed from the national average in 2017. Useα = 0.05for the level of significance, and state your conclusion.(a)State the null and alternative hypothesis. (Enter != for ≠ as needed.)H0:_____________Ha:__________(b)Find the value of the test statistic. (Round your answer to three decimal places.)Find the p-value. (Round your answer to four decimal places.)p-value =___________.
General
3 months ago
A landscape architect wished to enclose a rectangular garden on one side by a brick wall costing $20/ft and on the other three sides by a metal fence costing $10/ft. If the area of the garden is 122 square feet, find the dimensions of the garden that minimize the cost.
General
3 months ago
How much difference do a couple of weeks make for birth weight? Late-preterm babies are born with 34 to 36 completed weeks of gestation. The distribution of birth weights (in grams) for late-preterm babies is approximately N(2750, 560).1. What is the probability that a randomly chosen late-preterm baby would have a low birth weight (less than 2500 grams)? Round your answer to 4 decimal places.2. What is the probability that a randomly chosen late-preterm baby would have a very low birth weight (less than 1500 grams)? Round your answer to 4 decimal places.
General
3 months ago
the radius of the aluminum atom is 143pm. the radius of the aluminum atom is 54pm. by what percentage did the radius change as the ion formed?
General
3 months ago
Pizza is served in the school cafeteria every fourth school day. Tacos are served every third school day. Both Pisa and tacos were served today. In how many school days will pizza and tacos be served on the same day again?
General
3 months ago
There are 740 tickets purchased for a Major League Baseball game. The lower reserved tickets cost $9.50 and the upper reserve cost $8.00. The total amount of money was $6482.50. How many of each kind of ticket were purchased
General
3 months ago
a salesperson works 40 hours per week at a job where he has two options for getting paid. Option A is an hourly wage of $19. Option B is a commission rate of 8% on weekly sales. How much does he need to sell in a given week to earn the same amount with each option?
General
3 months ago
A box contains 3 coins. One coin has 2 heads and the other two are fair. A coin is chosen at random from the box and flipped. If the coin turns up heads, what is the probability that it is the two-headed coin? Is the answer 1/3? Was the answer intuitive?
General
3 months ago
Three years ago, the mean price of an existing single-family home was $243761. A real estate broker believes that existing home prices in her neighborhood are higher. (a) Determine the null and alternative hypotheses. (b) Explain what it would mean to make a Type I error. (c) Explain what it would mean to make a Type II error. (a) State the hypotheses.
General
3 months ago
What percent of 9 is 8.46
General
3 months ago
Two concentric spheres have radi of 5" and 6". Find the volume of the space between them.
General
3 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
3 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
3 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
3 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
3 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
3 months ago
George has 1/3 pan of brownies.He eats 1/4 of them.What fraction did George eat?
General
3 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
3 months ago
Please help! :) Need answer fast!
General
3 months ago
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