Answer:
143
Step-by-step explanation:
Your equation to find x is:
140+146/2 = 143
Answer:
0.38
Step-by-step explanation:
Divide 19 by 50.
Answer:
I feel like its C or B
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given that
sample size n = 55: x bar = 654.16 and s = sample sd = 162.34
Std error = 162.34/sqrt 55 = 21.889
For 95% CI we can use t critical value as population std dev is not known.
df = 54
t critical = 2.004
Margin of error = 2.004 *21.889 = 43.866
Confidence interval lower bound = 654.16-43.866 =610.294
Upper bound = 654.16+43.866=698.026
Confidence interval rounded off at 95% = (610.29, 698.23)
He went on the roller coaster 7 times and the boat ride 3 times.
4 x 7 = 28
3 x 3 = 9
28 + 9 = 37
