Suppose a geyser has a mean time between eruptions of 74 minutes74 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 28 minutes28 minutes. What is the probability that a randomly selected time interval between eruptions is longer than 86 minutes? (b) What is the probability that a random sample of 15 time intervals between eruptions has a mean longer than 86 minutes? (c) What is the probability that a random sample of 32 time intervals between eruptions has a mean longer than 86 minutes? What effect does increasing the sample size have on the probability? Provide an explanation for this result. Fill in the blanks below. If the population mean is less than 8686 minutes, then the probability that the sample mean of the time between eruptions is greater than 8686 minutes ▼ decreases increases because the variability in the sample mean ▼ decreases increases as the sample size ▼ decreases. increases. (e) What might you conclude if a random sample of 32 time intervals between eruptions has a mean longer than 86 minutes? Select all that apply. A. The population mean is 74 , and this is just a rare sampling. B. The population mean must be more than 74 , since the probability is so low. C. The population mean may be less than 74. D. The population mean is 74 , and this is an example of a typical sampling result. E. The population mean may be greater than 74. F. The population mean cannot be 74 , since the probability is so low. G. The population mean must be less than 74, since the probability is so low.

You first need to compute the demand function associated with the data set and use that demand function to compute the optimal price for the product. You can use 20% of the average price as the cost of the product.

please show excel work

A university is trying to determine what price to charge for tickets to football games. At a price of ​$27 per​ ticket, attendance averages 40,000 people per game. Every decrease of ​$33 adds 10,000 people to the average number. Every person at the game spends an average of ​$4.50 on concessions. What price per ticket should be charged in order to maximize​ revenue? How many people will attend at that​ price?

The comparative balance sheets for 2018 and 2017 are given below for Surmise Company. Net income for 2018 was $74 million.

SURMISE COMPANY
Comparative Balance Sheets
December 31, 2018 and 2017
($ in millions)
2018 2017
Assets
Cash $ 27 $ 35
Accounts receivable 86 100
Less: Allowance for uncollectible accounts (19 ) (2 )
Prepaid expenses 15 13
Inventory 129 110
Long-term investment 116 80
Land 92 92
Buildings and equipment 377 255
Less: Accumulated depreciation (128 ) (102 )
Patent 22 23
$ 717 $ 604
Liabilities
Accounts payable $ 16 $ 36
Accrued liabilities 2 17
Notes payable 42 0
Lease liability 113 0
Bonds payable 61 123
Shareholders’ Equity
Common stock 66 50
Paid-in capital—excess of par 255 205
Retained earnings 162 173
$ 717 $ 604

Required:
Prepare the statement of cash flows of Surmise Company for the year ended December 31, 2018. Use the indirect method to present cash flows from operating activities because you do not have sufficient information to use the direct method. You will need to make reasonable assumptions concerning the reasons for changes in some account balances. A spreadsheet or T-account analysis will be helpful. (Hint: The right to use a building was acquired with a seven-year lease agreement. Annual lease payments of $9 million are paid at January 1 of each year starting in 2018.) (Enter your answers in millions (i.e., 10,000,000 should be entered as 10). Amounts to be deducted should be indicated with a minus sign.)

Alfred Marshall developed a very important model that is considered one of the cornerstones of modern economic theory. Under this model, when the Supply increases, we can expect that

Select one: a. prices will decrease and the quantity traded in this market will increase

b. prices will increase and the quantity traded in this market will increase

c. prices will decrease and the quantity traded in this market will decrease

d. prices will increase and the quantity traded in this market will decrease

e. the prices and quantity will remain constant

This economist argued that workers invariably lose under capitalism the ability to determine life and destiny when deprived of the right to think of themselves as the director of their own actions; to determine the character of said actions; to define relationships with other people; and to own those items of value from goods and services, produced by their own labour.

Select one: a. Karl Marx b. Adam Smith c. Jeremy Bentham d. David Ricardo e. Thomas Malthus

To test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, a chemical company obtained the following data on the time (in minutes) needed to mix the material.

a) Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use α = 0.05.

Find the value of the test statistic. (Round your answer to two decimal places.)

Find the p-value. (Round your answer to three decimal places.)

p-value =

b) At the α = 0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3.

Find the value of LSD. (Round your answer to two decimal places.)

LSD =

Find the pairwise absolute difference between sample means for manufacturers 1 and 3.

x₁ − x₃ =

In one of Sue's experiments, 500 plants were treated with a chemical and 350 of them were found to have a plant disease. Use a 0.01 significance level to test the claim that the rate of plant disease among all plants treated with the chemical is equal to 74%.

State the final conclusion.

Applicable answers:

1. The sample evidence does NOT support the rejection of the null hypothesis claim that the rate of plant disease among all plants treated with the chemical is equal to 74%
2. The sample evidence does support the rejection of the null hypothesis claim that the rate of plant disease among all plants treated with the chemical is equal to 74%
3. The sample evidence does NOT support the rejection of the Sue's claim that the rate of plant disease among all plants treated with the chemical is equal to 74%
4. The sample evidence does support the rejection of the Sue's claim that the rate of plant disease among all plants treated with the chemical is equal to 74%

National Bearings manufactures bearings at plants located in Portland Oregon, Houston Texas, and Jacksonville Florida. To measure employee knowledge of Total Quality Management (TQM), six employees were randomly selected at each plant and tested. The test scores for these employees are given in DATA. Managers want to know if, on average, knowledge of TQM is equal across the 3 plants. Test equality of mean scores at x = 0.05

A. none of the answers are correct

B. Equality of means is not rejected with pvalue 0.295. Knowledge of TQM is equal across the 3 plants.

C. Equality of means in not rejected with pvalue of 0.060. Knowledge of TQM is equal across the 3 plants.

D. Equality of means is rejected with pvalue 0.010. Knowledge of TQM is not equal across the 3 plants.

E. Equality of means is rejected with pvalue 0.003. Knowledge of TQM is not equal across the 3 plants

An article in Knee Surgery, Sports Traumatology, Arthroscopy (2005, Vol. 13, pp. 273–279) “Arthroscopic meniscal repair with an absorbable screw: results and surgical technique” showed that only 25 out of 37 tears (67.6%) located between 3 and 6 mm from the meniscus rim were healed.

(a) Calculate a 99% two-sided confidence interval on the proportion of such tears that will heal. Round the answers to 3 decimal places.

--------------------- ≤p≤ --------------------------

(b) Calculate a 99% lower confidence bound on the proportion of such tears that will heal. Round the answer to 3 decimal places.

------------------- ≤p