A random sample of 8 experts has been chosen to rate brand A tea and brand...
A random sample of 8 experts has been chosen to rate brand A tea and brand B tea with 1 = extremely unpleasing, 6= extremely pleasing, see data below. Is there evidence of a difference in the mean ratings between the two brands at 0.05 level of significance?
|
Expert |
A |
B |
|
1 |
4 |
1 |
|
2 |
3 |
6 |
|
3 |
6 |
1 |
|
4 |
5 |
1 |
|
5 |
2 |
4 |
|
6 |
2 |
6 |
|
7 |
6 |
6 |
|
8 |
1 |
5 |
a. State the appropriate null and alternative hypotheses
b. Calculate test statistics
c. Find critical value
d. Make appropriate statistical and managerial decision
Homework Answers
from the given data, mean and sd of the difference
mean = -0.1250
sd = 3.6815
a)
H0: mu(d) = 0
Ha: mu(d) not equals to 0
b)
Test statistic,
t = -0.125/(3.6815/sqrt(8))
t = -0.0960
c)
critical value = -2.3646 and 2.3646
d)
As t-statistic is greater than -2.3646, we fail to reject H0
There are not significant evidence to conclude that there is
difference in two brands
Add Answer to:
A random sample of 8 experts has been chosen to rate
brand A tea and brand...
How do I solve these problems and input the answers into Excel 10.20 Nine experts rated...
How do I solve these problems and input the answers into Excel 10.20 Nine experts rated two brands of Colombian coffee in a taste testing experiment. A rating on a 7-point scale (1=extremely unpleasing, 7=extremely pleasing) is given for each of four characteristics: taste, aroma, richness, and acidity. The following data stored in Coffee contain the ratings accumulated over all four characteristics: a. At the 0.05 level of significance, is there evidence of a difference in the mean ratings between...
Assume that you have a sample of n1=7?, with the sample mean X1=42?, and a sample...
Assume that you have a sample of n1=7?, with the sample mean X1=42?, and a sample standard deviation of S1=4,and you have an independent sample of n2=13 from another population with a sample mean of X2=33 and the sample standard deviation S2=6. a. What is the value of the? pooled-variance tSTAT test statistic for testing H0: ?1=?2?? A local college newsletter reported that the average American college student spends one hour? (60 minutes) on a social media website daily. But...
Nine experts rated wo brands o coffee in a aste esing experiment. A rating on a...
Nine experts rated wo brands o coffee in a aste esing experiment. A rating on a 7-port scale extremely unpleasing. 7 = extremely pleasing is given or each o our characteristics: aste, aro ma nchness and ac dit The accompanying data table contains the ratings accumulated over all four characteristics. Complete parts (a) through (d) below. EEB Click the icon to view the data table. a. At the 0.01 level of significance, is there evidenoe of a difference in the...
Nine experts rated two brands of coffee in a taste-testing experiment. A rating on a 7-point scal...
Nine experts rated two brands of coffee in a taste-testing experiment. A rating on a 7-point scale (1 = extremely unpleasing, 7= extremely pleasing) is given for each of four characteristics: taste, aroma, richness, and acidity. The accompanying data table contains the ratings accumulated over all four characteristics. Complete parts (a) through (d) below 囲Click the icon to view the data table a. At the 0.10 level of significance, is there evidence of a difference in the mean ratings between...
thats the only other information i got Does co-browsing have positive effects on the customer experience?...
thats the only other information i got
Does co-browsing have positive effects on the customer experience? Co-browsing refers to the ability to have a contact center agent and customer jointly navigate an online document or mobile application on a real-time basis through the web. A study of businesses indicates that 83 of 132 co-browsing organizations use skills-based routing to match the caller with the right agent, whereas 86 of 173 non-co-browsing organizations Complete parts (a) and (b) below use skills-based...
2,-/12 pointsDevoreSta19 10.Е.027 Although tea is the world's most widely consumed beverage after...
2,-/12 pointsDevoreSta19 10.Е.027 Although tea is the world's most widely consumed beverage after water, little is known about its nutritional value. Folacin is the only B vitamin present in any significant amount in tea, and recent advances in assay methods have made accurate determination of folacin content feasible. Consider the accompanying data on folacin content for randomly selected specimens of the four leading brands of green tea. 1: 7.8 6.3 6.6 8.7 9.0 10.1 9.6 2: 5.8 7.5 9.8 6.2...
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand...
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same random sample of 8 cars. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the left front...
Help Save & Exit Check my A consumer advocate researches the length of life between two...
Help Save & Exit Check my A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data (measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. (You may find it useful to reference the appropriate table: z table or table) 10 points Brand A Brand B Brand A Brand B eBook **************** 3322282292393282939 Click...
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand...
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same random sample of 12 cars. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the left front...
Does a statistics course improve a student's mathematics skills, as measured by a national test? Suppose...
Does a statistics course improve a student's mathematics skills, as measured by a national test? Suppose a random sample of 13 students takes the same national mathematics exam prior to enrolling in a stats course and just after completing the course. At a 1% level of significance determine whether the scores after the stats course are significantly higher than the scores before. Take the differences = before - after. Before 430 485 520 360 440 500 425 470 515 430...
Nine experts rated wo brands o coffee in a aste esing experiment. A rating on a 7-port scale extremely unpleasing. 7 = extremely pleasing is given or each o our characteristics: aste, aro ma nchness and ac dit The accompanying data table contains the ratings accumulated over all four characteristics. Complete parts (a) through (d) below. EEB Click the icon to view the data table. a. At the 0.01 level of significance, is there evidenoe of a difference in the...
Nine experts rated two brands of coffee in a taste-testing experiment. A rating on a 7-point scale (1 = extremely unpleasing, 7= extremely pleasing) is given for each of four characteristics: taste, aroma, richness, and acidity. The accompanying data table contains the ratings accumulated over all four characteristics. Complete parts (a) through (d) below 囲Click the icon to view the data table a. At the 0.10 level of significance, is there evidence of a difference in the mean ratings between...
thats the only other information i got
Does co-browsing have positive effects on the customer experience? Co-browsing refers to the ability to have a contact center agent and customer jointly navigate an online document or mobile application on a real-time basis through the web. A study of businesses indicates that 83 of 132 co-browsing organizations use skills-based routing to match the caller with the right agent, whereas 86 of 173 non-co-browsing organizations Complete parts (a) and (b) below use skills-based...
2,-/12 pointsDevoreSta19 10.Е.027 Although tea is the world's most widely consumed beverage after water, little is known about its nutritional value. Folacin is the only B vitamin present in any significant amount in tea, and recent advances in assay methods have made accurate determination of folacin content feasible. Consider the accompanying data on folacin content for randomly selected specimens of the four leading brands of green tea. 1: 7.8 6.3 6.6 8.7 9.0 10.1 9.6 2: 5.8 7.5 9.8 6.2...
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same random sample of 8 cars. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the left front...
Help Save & Exit Check my A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data (measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. (You may find it useful to reference the appropriate table: z table or table) 10 points Brand A Brand B Brand A Brand B eBook **************** 3322282292393282939 Click...
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same random sample of 12 cars. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the left front...
Does a statistics course improve a student's mathematics skills, as measured by a national test? Suppose a random sample of 13 students takes the same national mathematics exam prior to enrolling in a stats course and just after completing the course. At a 1% level of significance determine whether the scores after the stats course are significantly higher than the scores before. Take the differences = before - after. Before 430 485 520 360 440 500 425 470 515 430...
Most questions answered within 3 hours.
-
Assume an array list is declared as follows:
int list[100]
and that all other variables have...
asked 1 minute ago -
Do you believe that as the pool of engineers decrease, or become
in higher demand, that...
asked 9 minutes ago -
A
700 kg car is coasting along a level road, slowing down at an
acceleration of...
asked 18 minutes ago -
find dB IL for a sound with the intensity of 3x10^-13 w/sq meter
with a reference...
asked 19 minutes ago -
Case 7-3: Wentworth Hospital Discussion Questions: essay
paragraph
Is there anything irregular here?
What is your...
asked 21 minutes ago -
1- A) How many milliliters of 0.100 M NaOH are needed to
neutralize 50.00 mL of...
asked 38 minutes ago -
It is determined that a reaction is 1st order in [BrO3-], 1st
order in [Br-] and...
asked 40 minutes ago -
Write a JavaScript program to implement the Least-Squares Linear
Regression algorithm shown below, for an arbitrary...
asked 51 minutes ago -
Determine the solubility of Cadmium in equilibrium with Cadmium
hydroxide, Cd(OH)2, as a function of pH....
asked 55 minutes ago -
When 34.2 grams of strontium reacts with excess molecular
oxygen, how many grams of the product...
asked 1 hour ago -
nformation related to the Berkley Company for the calendar year
2015 follows:
Liabilities, December 31, 2015...
asked 57 minutes ago -
Please help!
A voltaic cell consists of a Mn/Mn2+ anode (E°= -1.18 V) and a
Fe/Fe2+...
asked 1 hour ago