Question

In: Statistics and Probability

Please explain how to do 1a and b throughly, thank you! 1A) A psychologist specializing in...

Please explain how to do 1a and b throughly, thank you!

1A) A psychologist specializing in marriage counseling claims that, among all married couples, the proportion p for whom her communication program can prevent divorce is at least 76%. In a random sample of 225 married couples who completed her program, 164 of them stayed together. Based on this sample, can we reject the psychologist's claim at the 0.01 level of significance?Perform a one-tailed test. Then fill in the table below.

Carry your intermediate computations to at least three decimal places and round your answers as specified in the table.

The null hypothesis:

H0:

The alternative hypothesis:

H1:

The type of test statistic: (Choose one)Z t Chi square F
The value of the test statistic:
(Round to at least three decimal places.)
The critical value at the

0.01

level of significance:
(Round to at least three decimal places.)
Can we reject the psychologist's claim that the proportion of married couples for whom her program can prevent divorce is at least

76%

?
Yes No

1B) Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage over the years for Citrus cars has been about 1600 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 12 recent mileages of Citrus cars was taken. The mean of these 12 mileages was 1565 miles per month, and the standard deviation was 210 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.1 level of significance, can it be concluded that the mean recent monthly mileage, μ, of Citrus cars is less than 1600 miles per month?

Perform a one-tailed test. Then fill in the table below.

Carry your intermediate computations to at least three decimal places and round your answers as specified in the table.

The null hypothesis:

H0:

The alternative hypothesis:

H1:

The type of test statistic: (Choose one)Z t Chi square F
The value of the test statistic:
(Round to at least three decimal places.)
The p-value:
(Round to at least three decimal places.)
At the

0.1

level of significance, can it be concluded that the mean recent monthly mileage of Citrus cars is less than

1600

miles per month?
Yes No

Solutions

Expert Solution


Related Solutions

Please explain throughly ! thank you so much 1. What do we mean by economic growth?...
Please explain throughly ! thank you so much 1. What do we mean by economic growth? Why do economies grow? In principle, what are the main implications of such growth for the environment?
Please explain throughly ! thank you so much ! 6. Explain the challenges that countries face...
Please explain throughly ! thank you so much ! 6. Explain the challenges that countries face when considering how to coordinate over an international environmental agreement such as the Kyoto Protocol.
Please explain throughly! Thank you so much ! 4. Describe the key drivers that will either...
Please explain throughly! Thank you so much ! 4. Describe the key drivers that will either increase or decrease the costs of climate policy around the globe.
Please answer the following parts with good explanation. Thank you! 1A.)Explain how PIP2 is a membrane...
Please answer the following parts with good explanation. Thank you! 1A.)Explain how PIP2 is a membrane bound signaling molecule that can be modified by both GPCR and RTK pathways for different cell signaling pathways. 1B.) Why is it important that caspases are maintained in the cell as proenzymes prior to activation?
PLEASE REPLY ASAP please throughly explain: The aim of the assignment is to critically assess economic...
PLEASE REPLY ASAP please throughly explain: The aim of the assignment is to critically assess economic theory using a case study. That is, to analyze a real-world event using economic theory and data: Don't defend candy tax- instead evaluate the model based on the event (the focal point is the model not the event) Use data to assess whether or not your dependent variable acts in the way you expect it to use a case study to back it up...
Can you please explain how you get to this answer? Thank you! --- Suppose Home has...
Can you please explain how you get to this answer? Thank you! --- Suppose Home has unit Labor requirements: 3 units of labor (hours) to produce one pound of apples, 2 units of labor (hours) to produce one pound of banana. Suppose Foreign has unit Labor requirements: 5 units oflabor (hours) to produce a pound of apples, 1 unit of labor (hours) to produce one pound of banana. 1) Draw the Relative Supply of Apples for the world (Home and...
Please, kindly explain ETIOLOGY OF HIV. Thank you
Please, kindly explain ETIOLOGY OF HIV. Thank you
all 1a-f please 1a. Why is some pain necessary and sometimes beneficial? b. How can the...
all 1a-f please 1a. Why is some pain necessary and sometimes beneficial? b. How can the emotional response to pain impact someone's experience of pain? c. How does stress-induced analgesia work? d. What explanation does Sapolsky give for how acupuncture works? What explanation does he give for how placebos work? e. Why can stress cause people to sometimes experience more pain? What is this phenomenon called? f. What happens to stress induced analgesia and stress induced hyperalgesia, with regard to...
Please solve A, B, and C. Please use excel. Please show work. Thank you. A. Use...
Please solve A, B, and C. Please use excel. Please show work. Thank you. A. Use the stocks of Apple, SAP, IBM, Oracle, and Amazon Download the historical data of weekly stock prices and S&P 500 index prices from year 2017-2019 on the website of yahoo finance and save it on an excel file. B. Use a different sheet to save the market adjusted prices of Apple, SAP, IBM, Oracle, and Amazon t and the index. For each stock, compute...
HOW TO DO B PLEASE EXPLAIN IN DETAIL One measure of the risk or volatility of...
HOW TO DO B PLEASE EXPLAIN IN DETAIL One measure of the risk or volatility of an individual stock is the standard deviation of the total return (capital appreciation plus dividends) over several periods of time. Although the standard deviation is easy to compute, it does not take into account the extent to which the price of a given stock varies as a function of a standard market index, such as the S&P 500. As a result, many financial analysts...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT