Reference no: EM131071929
1. Sales at a fast-food restaurant average $6,000 per day. The restaurant decided to introduce an advertising campaign to increase daily sales. To determine the effectiveness of the advertising campaign, a sample of 49 days of sales was taken. It found that the average daily sales were $6,400 per day. From past history, the restaurant knew that its population standard deviation is about $1,000. The value of the test statistic is _______.
2. In a distribution, the second quartile corresponds with the __________.
3. Consider the following regression analysis between sales (Y in $1,000) and social media advertising (X in dollars). = 55,000 + 7X
The regression equation implies that an: (select one)
increase of $7 in advertising is associated with an increase of $7,000 in sales.
increase of $1 in advertising is associated with an increase of $62,000 in sales.
increase of $1 in advertising is associated with an increase of $7,000 in sales.
increase of $1 in advertising is associated with an increase of $7 in sales.
4. When a class interval is expressed as 100 up to 200, _________________________. (select one)
Observations with values of 200 are excluded from the class
Observations with values of 100 are excluded from the class
Observations with values of 200 are included in the class
The class interval is 99
5. The first card selected from a standard 52-card deck was a king. If it is returned to the deck, what is the probability that a king will be drawn on the second selection? (select one)
1/4 or 0.25
12/13 or 0.923
1/13 or 0.077
1/3 or 0.33
|
Quality-assurance department
: At the Warren Road MacBurger, the quality-assurance department sampled 50 customers and found that the mean waiting time was 2.75 minutes. At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
|
|
Define a correlation and provide an example
: 1. Define a correlation and provide an example 2. Define causality? 3. Explain if correlation causes causality.
|
|
Estimate the average age of the students
: The president of a large university wishes to estimate the average age of the students presently enrolled. From past studies, the variance is known to be 4 years. A sample of 49 students is selected and the mean is found to be 23.2.
|
|
What is job bidding
: Which of the following terms refers to a procedure commonly used during layoffs, in which employees with greater seniority whose jobs are eliminated displace employees with lesser seniority?
|
|
Population standard deviation
: The restaurant decided to introduce an advertising campaign to increase daily sales. To determine the effectiveness of the advertising campaign, a sample of 49 days of sales was taken. It found that the average daily sales were $6,400 per day. Fro..
|
|
Half-wave, full-wave and bridge rectifiers
: What differences exist between half-wave, full-wave and bridge rectifiers? Is it possible to interchange them in a circuit without effecting the output? Please explain your answer.
|
|
Advantages and disadvantages associated with strategies
: What kind of corporate-level strategies did News Corp pursue to build its multibusiness model - what are the advantages and disadvantages associated with these strategies?
|
|
Estimating the confidence interval
: Please explain the Central Limit Theorem and then the importance of it to your research. What is the key difference when to use a Z or a T Distribution when you are estimating the confidence interval?
|
|
Describe the biopsychosocial using only information obtained
: Describe the biopsychosocial using only information obtained by research. Who is the founder of the model? Provide some history of and needs for the model.
|