Answer:
<h2>The probability isStep-by-step explanation:
The probability of having high blood pressure is 17%.
We need to find the probability of 2 or fewer have high blood pressure.
Possibility 1: No one have high blood pressure.
The probability is .
Possibility 2: Only one have high blood pressure.
The probability is .
Possibility 3: 2 among the 10 have the high blood pressure.
.
Any of the possibilities can happen.
Hence, the required probability is +
+
.
Complete Question
From a random sample of size 18, a researcher states that (11.1, 15.7) inches is a 90% confidence interval for mu, the mean length of bass caught in a small lake. A normal distribution was assumed. Using the 90% confidence interval obtain:
a. A point estimate of and its 90% margin of error.
b. A 95% confidence interval for .
Answer:
a
.
b
Step-by-step explanation:
From the question we are told that
The sample size is n = 18
The 90% confidence interval is (11.1, 15.7)
Generally the point estimate of is mathematically evaluated as
=>
Generally the margin of error is mathematically evaluated as
=>
From the question we are told the confidence level is 90% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of is
Generally the equation for the lower limit of the confidence interval is
=>
=>
From the question we are told the confidence level is 95% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of is
Generally the margin of error is mathematically represented as
=>
=>
Generally 95% confidence interval is mathematically represented as
=>
=>