Complete the following four hypotheses, using α = 0.05 for each.
a. Mean sales for all stores is at least $52,000 (Mean sales = $53,332.8, standard dev = 21,448.14, n = 100)
b. Proportion of stores with a medium market size is less than 55% (Medium market size n = 52, market size = 100)
c. Mean sales for promotion #3 is more than $45,000 per week (Mean sales for promo 3 = $61,899.38, n = 48, standard dev = 19,625.52)
d. Mean store age is greater than 8 years.
1. Using the same data set from part A, perform the hypothesis test for each speculation in order to see if there is evidence to support the manager's belief. Use the Seven Elements of a Test of Hypothesis from Section 7.1 of your text book, as well as the p-value calculation from Section 7.3, and explain your conclusion in simple terms.
2. Compute 99% confidence intervals for each of the variables described in a.-d., and interpret these intervals.
3. Write a report about the results, distilling down the results in a way that would be understandable to someone who does not know statistics. Clear explanations and interpretations are critical.
Complete the following four hypotheses, using α = 0.05 for each. a. Mean sales for all...
Math533 Keller graduate university Project B Complete the following four hypotheses, using α = 0.05 for each. a. Mean sales for all stores is at least $52,000 b. Proportion of stores with a medium market size is less than 55% c. Mean sales for promotion #3 is more than $45,000 per week d. Mean store age is greater than 8 years. 1. Using the same data set from part A, perform the hypothesis test for each speculation in order to...
Complete the following four hypotheses, using α = 0.05 for each. The week 5 spreadsheet can be used in these analyses. 1. Mean sales per week exceed 42.5 per salesperson 2. Proportion receiving online training is less than 55% 3 Mean calls made among those with no training is at least 145 4. Mean time per call is 14.7 minutes Using the same data set from part A, perform the hypothesis test for each speculation in order to see if...
PLEASE USE THE BELOW GIVEN DATA TO SOLVE THIS PROBLEM. INCLUDING
THE BRIEF REPORT.
THANK YOU.
Sales (Y)
Calls (X1)
Time (X2)
Years (X3)
Type
47
167
12.9
5
ONLINE
47
167
16.1
5
ONLINE
44
165
14.2
5
GROUP
43
137
16.6
4
NONE
34
184
12.5
4
GROUP
36
173
14.3
4
GROUP
44
160
14.1
4
NONE
34
132
18.2
4
NONE
48
182
14.1
4
ONLINE
41
158
13.8
4
GROUP
38
163
10.8
4
GROUP...
There are choices for each blank
1. An increase in a (such as using a =0.1 instead of a= 0.05 / A
decrease in a (such as using a = 0.01 instead of a 0.05)
2. An increase / A decrese
3. numerator / denominator
4. increase / decrease
5. more / less
6. standard deviation / (standard deviation/root n) / X bar /
n
7. A decrease / An increase
8. decrease / increase
9. increase / decrease
9....
Use the following information to complete steps (a) through (d) below. A random sample of size n = 31 results in a sample mean of 123.3 and a sample standard deviation of 8.5. An independent sample of size n2 = 50 results in a sample mean of 129.8 and sample standard deviation of 7.3. Does this constitute sufficient evidence to conclude that the population means differ at the x = 0.005 level of significance? (a) What type of test should...
A grocery store analyst is studying daily sales for establishments located along the Gulf coast. The daily sales are known to follow a normal distribution. A random sample of 35 stores exhibited a sample mean (in thousands of dollars) of 9.43. The population standard deviation (in thousands of dollars) is known to be 2.85. Suppose the analyst's status quo understanding is that daily sales for this class of establishment averages (in thousands of dollars) no more than 8.00. What would...
Hypothesis Problems For the following hypothesis tests: a. State the null (Ho) and alternative (Hi) hypotheses b. State the type of test (right-tailed, left-tailed, or two-tailed) c. State the multiplier for an a (level of significance) of .05. The Chamber of Commerce states that only 15% of Boston tourists stay more than 2 days. A new chamber employee feels that the percentage staying more than 2 days is greater than 15%, and plans to sample a set of tourists to...
You wish to test the following claim (HaHa) at a significance level of α=0.05α=0.05. Ho:μ≤86.2Ho:μ≤86.2 Ha:μ>86.2Ha:μ>86.2 You believe the population is normally distributed and you know the standard deviation is σ=16.8σ=16.8. You obtain a sample mean of ¯x=89x¯=89 for a sample of size n=72n=72. What is the test statistic for this sample? (Report the answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The...
Data Summaries Sample Mean Sample Std Dev Sample Size 79.998 11.588 1000 Hypothesis Testing Confidence Interval Creation Level of Confidence: 95% Alpha (a) Value: 0.05 MOE 0.719 9 - MOE: 79.279 9 + MOE: 80.717 Confidence Interval Question What is the confidence interval telling you about the population parameter? Use the formula: df = n-1 Use the formula: (9-4_0)/(s/sqrt(n)) Degrees of Freedom: Alpha (a) Value: Test Statistic Value: Is your test statistic a z value or at value? P-Value Method...
For each of the following studies, the samples were given an experimental treatment and the researchers compared their results to the general population (all populations are normally distributed). For each, carry out a Z test using the 5 steps of hypothesis testing for a two-tailed test. Figure the 95% confidence intervals for each study. Be sure your answers for each study include the: SDM, Cut-off Z, Sample Z, Conclusion, and 95% Confidence Interval. Study Population Sample size Sample mean Significance...