The answer would be D. Lol I dont think this is mathematics though
Answer:
Step-by-step explanation:
n = 400
Proportion p = 229/400= 0.5725
For 95% confidence interval we use Z value as 1.96
Std error = 0.025
margin of error = 1.96*0.025
Confidence interval 95% = 0.5725±Margin of error
= (0.524, 0.621)
b) When smiled x becomes 277
p = 0.6925
Std error = 0.023
Margin of error= 1.96*0.023
Confidence interval = (0.647, 0.738)
Smiling increases the chances of stopping since mean and conidence interval bounds are showing increasing trend.
Answer: Commission rate = $30.72
Step-by-step explanation: For this problem we want to find the commission rate for sales that are a total of $768. The commission rate is 4%.
Convert 4% to a decimal. 4/100 = 0.04.
Now, multiply the sales by the decimal 0.04 to find the commission rate.
768 x 0.04 = 30.72, or $30.72 for the commission rate.
Answer:
22
Step-by-step explanation:
a×c=4×7=28
3×b=3×2=6
ac-3b=28-6=22
