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2. Don, a canteen owner claims that the average meal cost of his usual costumers
is 190 pesos. In order to test his claim, Don took a random sample of 25
costumers and found out that the meal cost is 210 with a standard deviation of
30 pesos. Test the hypothesis at 0.01 level of significance.
. One of the undersecretaries of the Department of Labor and Employment (DOLE) claims that the average salary of civil engineers is 18,000php. A sample of 19 civil engineers' salaries has a mean of 17,350php and a standard deviation of 1,230php. Is there enough evidence to reject the undersecretary's claim at a 0.01 level of significance?
In a biology class, a group of students brought 9 mice for their experiment. They measured the weight and the length of the body of each mouse from the tail to the nose. The findings are recorded below:
Length in cm
13
14
14
11
12
13
12
14
14
Weight in kg
10
10
12
11
16
14
14
17
17
What is the slope of the regression equation? Round your answers to the nearest hundredths.
A study was conducted to investigate the relationship between roadway surface temperature (x) and pavement deflection (y). The data are as follows:
x
65.3
66.4
70.8
70.7
69.8
71.6
72.1
72.4
73.5
y
0.6144
0.6273
0.6668
0.6781
0.6497
0.6678
0.6783
0.6755
0.6873
Calculate the Pearson correlation coefficient. Round your answers to the nearest hundredths.
In a biology class, a group of students brought 9 mice for their experiment. They measured the weight and the length of the body of each mouse from the tail to the nose. The findings are recorded below:
Length in cm
4
5
5
5
7
8
9
9
10
Weight in kg
6
7
8
10
10
11
12
12
13
Calculate the Pearson correlation coefficient. Round your answers to the nearest hundredths.
9 defective electric toothbrushes were accidentally shipped to a drugstore by Cleanbrush Products along with 29 nondefective ones.
What is the probability the first two electric toothbrushes sold will not be defective?
Considering the IQ results, the school administrator is also planning to offer additional math courses to the top 20%. What should be the IQ score of the student to be qualified to take the additional math course?
Mrs oli plans to select 360 grade eleven students obtained from the population. The selected respondents has an average height of 170 cm and a sample standard deviation of 25 cm. What is the 95% confidence interval of all the student's heights?
In a test of hypothesis about a mean, The critical value for = 0.05 and a two tailed test is 1.96. The resulting statistic value for the sample data is - 1.75.
Which is the correct decision on the null hypothesis based on the given information?
A. Reject the null hypothesis
B. Do not reject the null hypothesis
C. Change the alternative hypothesis
D. Redefine the hypothesis.
Given the following situation determine what test should be applied, write A, if it is two-tailed, B if one-tailed (left-tailed), C if one-tailed (right-tailed) and D if cannot be determined.
Comparing the survey results of votes to the actual votes received by a candidate in an election.
A government official claims that the traffic violations occurring in the city is not as much as 5 violations a day.
