Answer:
143.31 < µ < 176.69
Step-by-step explanation:
The manager wants a 90% confidence interval based on the data. We are given 6 weekdays of data. We have to do 3 things:
1. Calculate the mean number of customers
2. Calculate the standard deviation of the number of customers
3. Construct the confidence interval
*For #1 and #2, see attached photo 1 for the calculations...
The sample mean is: 160
The sample standard deviation is: 20.29
The t-value we need is found using the t-distribution chart, with 5 degrees of freedom. Our t-value is: 2.015
*See attached photo 2 for construction of the confidence interval
Answer:
-9
Step-by-step explanation:
Answer:
36
Step-by-step explanation:
Number of points Fran won = points Fran had - points Calvin had
14 - (-22)
= 14 + 22
= 36
Answer: 16, 212
Step-by-step explanation:
Product means multiplication
Therefore, multiply 579 by 28 by punching the two numbers into a calculator:
579 x 28 = 16,212
I hope this answers your question.
Answer:
x = -3 +
, -3 - 
Step-by-step explanation:
Step 1: Isolate <em>x</em>'s
2x² + 12x = 7
Step 2: Factor
2(x² + 6x) = 7
x² + 6x = 7/2
Step 3: Complete the Square
x² + 6x + 9 = 7/2 + 9
(x + 3)² = 25/2
Step 4: Solve for <em>x</em>
√(x + 3)² = √25/2
x + 3 = 5√2/2
x = -3 ± 5√2/2