Question

Step 1

**a.**

**Confidence Interval:**

The form of the confidence interval is,

*CI *= Point estimate ± Margin of error

The approximate 100*(1–α)% confidence interval for the population proportion will be obtained using the formula given below:

Step 2

**Obtain the sample proportion of registered voters who favor drilling for oil in national parks:**

It is given that among a sample of 1,500 registered voters in a opinion poll, 230 registered voters responded that they would favor drilling for oil in national parks.

The sample size is *n *= 1,500.

The number of specified characteristics is *x* = 230.

The sample proportion of registered voters who favor drilling for oil in national parks is obtained as 0.1533 from the calculation given below:

Step 3

**Obtain the critical value:**

The given confidence level is 100*(1–α)% = 95%.

From this, the level of significance value is α = 0.05.

The critical value corres...

Tagged in

Q: A research group claims that 20% of patients with dementia never develop full Alzheimer's. In a simp...

A: According to the given question, to test the hypothesis that the research group claims that 20% of p...

Q: 15.) The age in years of 11 children and the number of words in their vocabulary is given below: ...

A: The equation of the regression line is:

Q: Let x be a random variable that represents hemoglobin count (HC) in grams per 100 milliliters of who...

A: (A)The sample mean and standard deviation is calculated below:

Q: Could you help me with these questions in regaurds to the table provided? (2) Calculate covariance b...

A: Click to see the answer

Q: A biologist looked at the relationship between number of seeds a plant produces and the percent of t...

A: The estimated regression line is as follows:

Q: Let A and B be two events with P(A) = 0.71 and P(B) = 0.44. What is the smallest possible value of P...

A: According to the given question, A and B be two events with probability P(A)=0.71 and P(B)=0.44 the...

Q: A farmer wants to test if a new fertilizer will produce more massive crops. In order to do this, he ...

A: Paired t-test statistic:In order to test a hypothesis regarding whether the difference between a pai...

Q: The data 17.7 33.5 26.3 22.9 21.4 e 28.9 24.2 18.3 27.9 21.2 19.2 22.121.6 37.7 37.4 presents the bo...

A: Frequency distribution:Frequency of an interval is the number observations that fall in that interva...

Q: Compute the sample correlation coefficient r for each of the following data sets and show that r is ...

A: We know the sample correlation coefficient r between x and y variable as:

Sorry about that. What wasn’t helpful?