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MATH SOLVE
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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
10 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
10 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
10 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
10 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
10 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
10 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
10 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
10 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
10 months ago
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
10 months ago
An elementary school art class teacher plans to display artwork next to the door of each of the classrooms in the school. Each classroom door will only have one piece of artwork displayed, and the school has 22 such doors. If the teacher has 12 sketches and 16 oil paintings, what is the probability that 10 sketches and 12 oil paintings are chosen to be displayed?
General
10 months ago
Flip a coin 100 times. We want the chance of getting exactly 50 heads. What is the exact probability, correct to six decimal places? What is the Normal approximation of the probability, to six decimal places?
General
10 months ago
Consider a credit card with a balance of $8500 and an APR of 15.99%. In order to pay off the balance in 3 years, what monthly payment would you need to make?
General
10 months ago
If two dice are thrown, and you sum the digits. What number has the highest probability of appearing?
General
10 months ago
Let x be a random variable that represents the pH of arterial plasma (i.e., acidity of the blood). For healthy adults, the mean of the x distribution is μ = 7.4.† A new drug for arthritis has been developed. However, it is thought that this drug may change blood pH. A random sample of 31 patients with arthritis took the drug for 3 months. Blood tests showed that x = 8.6 with sample standard deviation s = 2.9. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH level of the blood (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution.What is the value of the sample test statistic? (Round your answer to three decimal places.)
General
10 months ago
An electric scale gives a reading equal to the true weight plus a random error thatis normally distributed with mean 0 and standard deviation s = .1 mg. Supposethat the results of five successive weighings of the same object are as follows: 3.142,3.163, 3.155, 3.150, 3.141.(a) Determine a 95 percent confidence interval estimate of the true weight.(b) Determine a 99 percent confidence interval estimate of the true weight.
General
10 months ago
for two weeks the highest temperature each day was recorded in four different cities lines l,m,n, and p are graphs of the temperature over time in Lubbock, Memphis, New Orleans, and phoenix which statement is true
General
10 months ago
Bryan wants to purchase a skateboard. He has $50 to spend. he finds one that regularly sells for $70.00 and is on sale for 40% off. Sales tax is 7%. Bryan says he has enough money to buy the skateboard. is he correct?
General
10 months ago
It takes 60 minutes to make 2000 copies on an old copy machine. The newer copier works with the old copier to create 2000 sheets and it only takes 15 minutes. How many minutes would the new copier need to create the 2000 copies on its own?
General
10 months ago
Which of the following is a zero does the function f (x) =(x+3) (x-7) (x+5)X=-7X=-3X=3X=5
General
10 months ago
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