Just answer: According to the P value, what is the mean difference statistically significant?Based on the results, can you reject the null hypothesis?Is the entire staff operating at a good level? Case 2: Secret Shoppers"Secret shoppers" are often employed by retailers to randomly rate the customer servicequality of their employees. One such retailer has just received ratings for 15 of theiremployees. Ratings are measured on a scale of 1 to 5 (5 being the highest). The retailer setsa value of 3 as "good." The retailer wants to determine if the entire staff is operating at at-Test: One-SampleMean (rating)2.88Variance2.41Observations15"good" level, or at some other level. The retailer wants to be 90% confident that the resultsare true and not a result of random chance. The retailer conducts a one-sample, t-test (seet-statistic-0.30P(t T) two-tail0.766results in K2:M7).#:QuestionsWhat is the sample size?According to the case, what should be the Hypothesized Mean (M)? Enter a numeric value.115What is the null hypothesis (Ho) of this test?HO: µ = 3 (rating equal to 3)What is the alternative hypothesis (H,) of this test?Calculate the difference between the Sample Mean and the Hypothesized Mean? (x - M)What value is the Degrees of Freedom?Given the desired confidence level, what alpha should be used?H1: µ #3 (rating not equal to 3)-0.12614a = 0.1What is the p-value equal to for this this test?According to the p-value, is the mean difference statistically significant?8p= 0.7669[select]10Based on the results, can you reject the null hypothesis (H,)?[select]11Is the entire staff operating at a "good" level?[select]

Given that P-value = 0.766 Level of significance = 0.1

Answered: According to the P value, what is the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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Just answer: According to the P value, what is the mean difference statistically significant? Based on the results, can you reject the null hypothesis? Is the entire staff operating at a good level?

Case 2: Secret Shoppers
"Secret shoppers" are often employed by retailers to randomly rate the customer service
quality of their employees. One such retailer has just received ratings for 15 of their
employees. Ratings are measured on a scale of 1 to 5 (5 being the highest). The retailer sets
a value of 3 as "good." The retailer wants to determine if the entire staff is operating at a
t-Test: One-Sample
Mean (rating)
2.88
Variance
2.41
Observations
15
"good" level, or at some other level. The retailer wants to be 90% confident that the results
are true and not a result of random chance. The retailer conducts a one-sample, t-test (see
t-statistic
-0.30
P(t T) two-tail
0.766
results in K2:M7).
#:
Questions
What is the sample size?
According to the case, what should be the Hypothesized Mean (M)? Enter a numeric value.
1
15
What is the null hypothesis (Ho) of this test?
HO: µ = 3 (rating equal to 3)
What is the alternative hypothesis (H,) of this test?
Calculate the difference between the Sample Mean and the Hypothesized Mean? (x - M)
What value is the Degrees of Freedom?
Given the desired confidence level, what alpha should be used?
H1: µ #3 (rating not equal to 3)
-0.12
6
14
a = 0.1
What is the p-value equal to for this this test?
According to the p-value, is the mean difference statistically significant?
8
p= 0.766
9
[select]
10
Based on the results, can you reject the null hypothesis (H,)?
[select]
11
Is the entire staff operating at a "good" level?
[select]

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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