1. A business entrepreneur that sells a particular bottled fruit juice claims that the average capacity of their product is equal or higher than 300 mL. To test the claim, a business analyst gets a sample of 20 such bottles, and found out that the mean capacity is lower, that is 275 mL and a standard deviation of 25.5 mL. Use a = 5% to test the claim. Answer the following Но: На: a. Level of significance a= c. Type of test. Choices: one-mean, two-tailed t-test two-mean, one-tailed t-test one-mean, one-tailed z-test two-mean, two-tailed z-test
1. A business entrepreneur that sells a particular bottled fruit juice claims that the average capacity of their product is equal or higher than 300 mL. To test the claim, a business analyst gets a sample of 20 such bottles, and found out that the mean capacity is lower, that is 275 mL and a standard deviation of 25.5 mL. Use a = 5% to test the claim. Answer the following Но: На: a. Level of significance a= c. Type of test. Choices: one-mean, two-tailed t-test two-mean, one-tailed t-test one-mean, one-tailed z-test two-mean, two-tailed z-test
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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Pls help me answer this question. Thank you. The other picture is a guide
Transcribed Image Text:1. A business entrepreneur that sells a particular
bottled fruit juice claims that the average capacity
of their product is equal or higher than 300 mL. To
test the claim, a business analyst gets a sample of
20 such bottles, and found out that the mean
capacity is lower, that is 275 mL and a standard
deviation of 25.5 mL. Use a = 5% to test the claim.
Answer the following
Но:
На:
a. Level of significance
a=
с. Туре of test.
Choices: one-mean, two-tailed t-test
two-mean, one-tailed t-test
one-mean, one-tailed z-test
two-mean, two-tailed z-test
d.Tabulated value and computed value
e. Decision
f. Interpretation
Transcribed Image Text:The mean score obtaingd by OLFU students in entrance examination is 87. A group of 25 freshman students
scored an average of 85 with a standard deviation of 5. Based on this result the admission officeasserts
that the group's average score is lower than 87. if you were one of those students, would you agree?
Make a necessary statistical analysis to support your answer. Use 0.05 level of significance.
The group's average score is
at least 87.
4. Area of Rejection t-tu
1. Ho:
HZ87
df =n -1
The group's average score is
lower than 87.
df = 25 - 1
df = 24
V Ha:
H< 87
nj et th
2. Level of significance:
0.05
-1.7110
Decision Rule:
3. Test Statistic:
Reject H, if the computed value is
< -1.7110
25
-test; one -mean/s; one.tailed test
Otherwise do not reject H
,.
CRITICAL VALUES of t
Level of significance for one-tailed test
Level of significance for one-tailed test
0.005
df
0.10
0.05
0.025
0.01
.0005
df
0.10
0.05
0.025
0.01
0.005
.0005
Level of significance for two-tailed test
Level of significance for two-tailed test
0.05
df
0.20
0.10
0.02
0.01
0.001
df
0.20
0.10
0.05
0.02
0.01
0.001
16
1.3370
1.7460
2.1200
2.5830
2.9210
4.0150
17
1.3330
1.7400
2.1100
2.5670
2.8980
3.9650
3.0780
1.8860
1
6.3140
12.7060
31.8210
63.6570
636.6190
18
1.3300
1.7340
2.1010
2.5520
2.8780
2,8610
3.9220
2.9200
2.3530
2.1320
1.3030
6.9650
1.3260
1.3250
9.9250
31.5980
2.0930
19
20
1.7290
2.5390
3.8830
3.8500
1.7250
12.9410
8.6100
3
1.6380
3.1820
4.5410
5.8410
2.0860
2.5280
2.8450
4
1.5330
2.7760
3.7470
4.6040
21
1.3230
1.7210
2.0800
2.5180
2.8310
3.6190
5
1.4760
2.0150
2.5710
3.3650
4.0320
6.8590
22
1.3210
1.7170
2.0740
2.5080
2.8190
3.7920
23
1.3190
1.7140
2.0690
2.5000
2.8070
3.7670
6.
1.4400
1.9430
2.4470
3.1430
3.7070
5.9590
24
1.3180
1.7110
2.0640
2.4920
2.7970
3.7450
7
1.4150
1.8950
2.3650
2.9980
3.4990
5.4050
25
1.3160
1.7080
2.0600
2.4850
2.7870
3.7250
1.3970
1.8600
2.3060
2.8960
3.3550
5.0410
26
1.3150
1.7060
2.0560
2.4790
2.7790
3.7070
9
1.3830
1.8330
2.2620
2.8210
3.2500
4.7810
27
1.3140
1.7030
2.0520
2.4730
2.7710
1.3720
2.2280
3.6900
3.6740
10
1.8120
2.7640
3.1690
4.5870
28
1.3130
1.7010
2.0480
2.4670
2.7630
29
1.3110
1.6990
2.0450
2.4620
2.7560
3.6590
11
1.3630
1.7960
2.2010
2.7180
3.1060
4.4370
30
1.3100
1.6970
2.0420
2.4570
2.7500
3.6460
1.3560
1.3500
1.3450
1.3410
2.6810
2.6500
2.6240
2.6020
12
1.7820
2.1790
3.0550
4.3180
4.2210
13
1.7710
2.1600
3.0120
40
1.3030
1.6840
2.0210
2.4240
2.7040
3.5510
2.6600
2.6170
2.5760
60
1.2960
1.6710
2.0000
2.3900
3.4600
1.7610
1.7530
2.1450
2.1310
14
2.9770
4.1400
120
1.2890
1.6580
1.9800
2.3580
3.3730
15
2.9470
4.0730
1.2820
1.6450
1.9600
2.3260
3.2910
Example # 4
The mean score obtained by OLFU students in entrance examination is 87. A group of 25 freshman
students scored an average of 85 with a standard deviation of §. Based on this result the
admission office asserts that the group's average score is lower than 87. if you were one of those
students, would you agree?
Make a necessary statistical analysis to support your answer. Use 0.05 level of significance.
5. Compute for the value:
アー!
t =
7. Interpretation: R+ Ha NX + Ma
85 - 87
Rejection
+ the group's average score is lower than 87
-2
of the null hypothesis (Ho) means that
%3D
V25
base on the sample of 25 students_using 0.05
of significance. Therefore, the claim of_ Admission office
level
Caleu: (85 - 87) + (5+ 25)
6. Decision:
-1 < -17)
Since, the computed t-value L
-2
correct
) is
is
less than
the tabular value (-1.711).
Therefore,
reject
the null hypothesis
(Ho) at 0.05 level of significance.
Fajact
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