subject
Mathematics, 13.02.2020 23:53 21ghostrider21

A. A researcher reads that in the population of US students, the average income of students is $1500. In a random sample of 300 students, he finds that the mean monthly income is $1,445 with a standard deviation of $530. Conduct a one-tailed t-test to see if the mean in his sample is significantly (p<.05) lower than the population mean. What is the value of "t" that you find?

B. In the previous question, there were 300 respondents. Look at the t-test table in your book. If the t-score that was calculated was between 1.7 and 1.9, would you be able to reject the null hypothesis (p<.05) that the means of the sample and the population are the same? [Note: Because we have a prediction (that the sample might be less than the population) we use a one-tailed test.]

c. In the previous example, could you reject the null hypothesis with 99% confidence?

ansver
Answers: 1

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 19:50, dalejacksoniip5yf4y
Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit
Answers: 1
image
Mathematics, 21.06.2019 21:30, paolacorazza
Miss henderson wants to build a fence around a rectangular garden in her backyard in the scale drawing the perimeter of the garden is 14 in of the actual length of a b is 20 ft how many feet of fencing what you need
Answers: 3
image
Mathematics, 21.06.2019 23:00, leverso
You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax
Answers: 1
image
Mathematics, 22.06.2019 00:30, challenggirl
20 ! brainliest ! add and simplify your answer.
Answers: 1
You know the right answer?
A. A researcher reads that in the population of US students, the average income of students is $1500...

Questions in other subjects:

Konu
World Languages, 19.06.2020 19:57