Answer:
139
Step-by-step explanation:
14+14+28+33+33+17 = 139
Answer:
The sample size is
Step-by-step explanation:
From the question we are told that
The margin of error is E = 1.5 seconds
The standard deviation is s = 4 seconds
Given that the confidence level is 97% then the level of significance is mathematically represented as
=>
Generally from the normal distribution table the critical value of is
Generally the sample size is mathematically represented as
=>
=>
8.25% (decimal) and 33/400 (fraction)
Answer:
10 -.-
Step-by-step explanation: