Mathematics, 05.01.2021 17:00 yradf57441
Suppose a university advertises that its average class size is 30 or less. A student organization is concerned that budget cuts have led to increased class sizes and would like to test this claim. A random sample of 39 classes was selected, and the average class size was found to be 33.2 students. Assume that the standard deviation for class size at the college is 9 students. Using α=0.05, complete part a below.
a. Does the student organization have enough evidence to refute the college's claim?
Determine the null and alternative hypotheses.
H0: μ (greater than or equals≥ less than or equals≤ greater than> not equals≠equals= less than<)
H1: μ (equals= less than or equals≤ greater than or equals≥ less than< greater than> not equals≠)
The z-test statistic is
(Round to two decimal places as needed.)
The critical z-score(s) is(are) .
(Round to two decimal places as needed. Use a comma to separate answers as needed.)
Because the test statistic (does not fall within the critical values, is greater than the critical value, is less than the critical value, falls within the critical values)
(do not reject, reject) the null hypothesis.
Enter your answer in the edit fields
Answers: 2
Mathematics, 21.06.2019 14:10
Determine whether the samples are independent or dependent. upper a data set includes the morning and evening temperature for the lasta data set includes the morning and evening temperature for the last 90 days.90 days.
Answers: 1
Mathematics, 21.06.2019 22:00
Find the maximum value of p= 4x + 5y subject to the following constraints :
Answers: 1
Mathematics, 21.06.2019 23:20
Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?
Answers: 2
Mathematics, 22.06.2019 01:00
Which of the following statements is true? a. the irrational number system is not closed under multiplication, because the product of two irrational numbers is always a rational number. b. the irrational number system is not closed under multiplication, because the product of two irrational numbers is not always an irrational number. c. the irrational number system is closed under multiplication, because the product of two irrational numbers is always an irrational number. d. the irrational number system is closed under multiplication, because the product of two irrational numbers is always a rational numbers. reset submit
Answers: 1
Suppose a university advertises that its average class size is 30 or less. A student organization is...
Mathematics, 08.06.2021 20:10
Computers and Technology, 08.06.2021 20:10
Mathematics, 08.06.2021 20:10
Mathematics, 08.06.2021 20:10
World Languages, 08.06.2021 20:10
English, 08.06.2021 20:10
Mathematics, 08.06.2021 20:10
Mathematics, 08.06.2021 20:10
Social Studies, 08.06.2021 20:10
Computers and Technology, 08.06.2021 20:10
Mathematics, 08.06.2021 20:10