A statistics teacher claims that, on the average, 15% of her students get a grade of A, 15% get a B, 25% get a C, 15% get a D,and 30% get an F. The grades of a random sample of 130 students were recorded. The following table presents the results. Testthe hypothesis that the grades follow the distribution claimed by the teacher. Use the 0.05 level of significance and the P-valuemethod with the TI-84 Plus calculator.GradeB CDFObserved8.26312441Send date to ExcelPart: 0/5Part 1 of 5(a) How many of the students in the sample got an A? How many got a D?The number of students who got an A isThe number of students who got a D is

Given: Sample data: Grade frequency A 8 B 26 C 31 D 24 F 41

Answered: (a) How many of the students in the…

(a) How many of the students in the sample got an A? How many got a D? The number of students who got an A is The number of students who got a D is

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

A statistics teacher claims that, on the average, 15% of her students get a grade of A, 15% get a B, 25% get a C, 15% get a D,
and 30% get an F. The grades of a random sample of 130 students were recorded. The following table presents the results. Test
the hypothesis that the grades follow the distribution claimed by the teacher. Use the 0.05 level of significance and the P-value
method with the TI-84 Plus calculator.
Grade
B C
D
F
Observed
8.
26
31
24
41
Send date to Excel
Part: 0/5
Part 1 of 5
(a) How many of the students in the sample got an A? How many got a D?
The number of students who got an A is
The number of students who got a D is

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