Step-by-step explanation:
Assuming the data is as shown, restaurant X has a mean service time of 180.56, with a standard deviation of 62.6.
The standard error is SE = s/√n = 62.6/√50 = 8.85.
At 95% confidence, the critical value is z = 1.960.
Therefore, the confidence interval is:
180.56 ± 1.960 × 8.85
180.56 ± 17.35
(163, 198)
Restaurant Y has a mean service time of 152.96, with a standard deviation of 49.2.
The standard error is SE = s/√n = 49.2/√50 = 6.96.
At 95% confidence, the critical value is z = 1.960.
Therefore, the confidence interval is:
152.96 ± 1.960 × 6.96
152.96 ± 13.64
(139, 167)
Answer:
1,170 cookies
Explanation:
the baker works 8 hour, subtract 1 hour(lunch break) and 30 mins(both breaks) and you get 6 1/2 hours. then you multiply 6 by 180(90 cookies in 30 mins= 180 cookies an hour). once you multiply that you should get 1080, then you add 90 for the half hour.
Answer:
336 ft
Explanation: Because of the value of how far they went
