Login
Premium
Home Question Bank Math Statistics
Question
upstudy study bank question image url

To determine her blood pressure, Carolyn divides up her day into three parts: moming, aftemoon, and evening. She then measures her blood pressure at
3 randomly selected times during each part of the day.
What type of sampling is used?
A. Cluster
B. Systematic
C. Stratified
D. Convenience
E. Simple random

Ask by Huff Cox. in the United States
Jan 22,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

The sampling method used is Stratified.

Solution

To determine the type of sampling used in Carolyn’s method of measuring blood pressure, let’s analyze the situation:
  1. Dividing the day into parts: Carolyn divides her day into three distinct parts: morning, afternoon, and evening. This indicates that she is considering different segments of the population (in this case, different times of the day).
  2. Measuring at random times: She then measures her blood pressure at 3 randomly selected times during each part of the day. This means that within each segment (morning, afternoon, evening), she is selecting times randomly.
Based on this analysis, the sampling method used is C. Stratified sampling. This is because she is dividing the population (the day) into strata (the three parts of the day) and then taking random samples from each stratum.
Thus, the correct answer is C. Stratified.

Answered by UpStudy AI and reviewed by a Professional Tutor

error msg
Explain
Simplify this solution

Bonus Knowledge

What Carolyn is using in her method is a combination of stratifying her day into three distinct parts and then randomly selecting times within each part to measure her blood pressure. This allows her to ensure that each segment of the day is represented in her data collection, enhancing the reliability of her findings!
In real-world applications, stratified sampling is often used in surveys or studies to ensure that various subgroups within a population are adequately represented. For example, when conducting market research, companies may stratify their customers by age or income level. This makes sure that the feedback gathered reflects the opinions of all segments, leading to better-informed decision-making!

Related Questions

The batteries from a certain manufacturer have a mean lifetime of 840 hours, with a standard deviation of 70 hours. Assuming that the lifetimes are normally distributed, complete the following statements. (a) Approximately 99.7% of the batteries have lifetimes between ◻ hours and ◻ hours. (b) Approximately 3 B of the batteries have lifetimes between 700 hours and 980 hours.
Statistics United States Mar 31, 2025
Pew Research in 2018 polled a random sample of 1058 U.S. teens (ages 13-17) about Internet use. 44.7% reported that they were online "almost constantly" -a fact of great interest to advertisers. Complete parts a through c below. a) Explain the meaning of p^=0.447 in the context of this situation. Choose the correct answer below. A. The meaning of p^=0.447 is that 44.7% of the 1058 teens in the sample reported that they were online "almost constantly." This is the researchers' best estimate of p, the proportion of all U.S. teens who would say that. B. The meaning of p^=0.447 is that 44.7% of the 1058 teens in the sample reported that they were online "almost constantly." This is the researchers' best estimate of p^, the proportion of the 1058 teens in the sample who said that. C. The meaning of p^=0.447 is that the researchers have 95% confidence that 44.7% of all U.S. teens would report that they were online "almost constantly." D. The meaning of p^=0.447 is that the researchers have 95% confidence that 44.7% of the 1058 teens in the sample reported that they were online "almost constantly." b) Calculate the standard error of p^. SE(p^)= ◻ (Round to five decimal places as needed.)
Statistics United States Mar 31, 2025
\begin{tabular}{l} ter 13 Review \\ \( 1 \leftarrow \quad \begin{array}{l}\text { A Morning Consult/Politico poll of } 1997 \text { registered voters in July } 2020 \text { asked a standard polling question of whether the United States was headed in the "Right Direction" or } \\ \text { was on the "Wrong Track." } 75.3 \% \text { said that things are on the wrong track vs. } 24.7 \% \text { who said "right direction." Complete parts a and b. } 51.35 \%, 19 \text { of } 37 \text { points } \\ \text { Part } 1 \text { of 2 }\end{array} \) \\ \( \begin{array}{l}\text { a) Calculate the margin of error for the proportion of all U.S. adults who think things are on the wrong track for } 99 \% \text { confidence. } \\ \text { ME }=\square \text { (Round to three decimal places as needed.) }\end{array} \) \\ \hline\end{tabular}
Statistics United States Mar 31, 2025
2. Pew Research in 2018 polled a random sample of 1058 U.S. teens (ages 13−17 ) about Internet use, 44.7% reported that they were online "almost constantly"-a fact of great interest to advertisers. Complete parts a through c below. a) Explain the meaning of p^=0.447 in the context of this situation. Choose the correct answer below. A. The meaning of p^=0.447 is that 44.7% of the 1058 teens in the sample reported that they were online "almost constantly." This is the researchers' best estimate of p, the proportion of all U.S. teens who would say that. B. The meaning of p^=0.447 is that 44.7% of the 1058 teens in the sample reported that they were online "almost constantly." This is the researchers' best estimate of p^, the proportion of the 1058 teens in the sample who said that. C. The meaning of p^=0.447 is that the researchers have 95% confidence that 44.7% of all U.S. teens would report that they were online "almost constantly." D. The meaning of p^=0.447 is that the researchers have 95% confidence that 44.7% of the 1058 teens in the sample reported that they were online "almost constantly."
Statistics United States Mar 31, 2025
A Moring ConsulvPoifico poll of 1997 registered voters in July 2020 asked a standard poling question of whether the United States was headed in fhe Right Drection" or was on the "Wrong Track" 75.3% said that things are on the wrong track ve. 24.7% who said "right direction. "Complete parts a and b. a) Calculate the margin of error for the proportion of all U.S. adults who think things are on the wrong track for 99% confidence. ME = ◻ 0.025 (Round to three dochat phoes mes nootod.) b) Explain what this margin of error means. Select the correct choice below and firir in the answer box within your choice. (Round to three decimal places as needed.) A. The probability that ary given adult surveyed from the population will respond "Wrong Track" is ◻ B. One is 99% conflident that the observed proportion of adults that responded "Wrong Track" is within ◻ of the sample proportion. C. The probatility that miny given adut gurvoyod from the sample responded whong Track" is ◻ ? D. Ono is 90\% contident that the observed proportion of adulys that responded Whong Tracte is with ◻ of the popetation proportion
Statistics United States Mar 31, 2025

Latest Statistics Questions

one university, the mean distance commited to campus by stubenits is 19.0 milles, with a standand deviation of 5.1 miles. Suppose that the cummute ances are nomally distributed. Complete the following statements. (a) Approximately 95% of the studenits have commute distances between and ◻ miles. (b) Approximates miles and 34.3 miles.
Statistics United States Mar 31, 2025
On a nationwide test taken by high schodi stubents, the thean soore was 52 and whe standard devation was 13 . the sodres were notmally distributad. Complete the following statements. (a) Approximately ? 8 of the students scored between 39 and 65 (b) Approximately 99.7% of the students scored between ◻ and ◻.
Statistics United States Mar 31, 2025
The Paralyzed Veterans of America is a philanthropic organization that relies on contributions. They send free malling labels and greeting cards to potential donors on their list and ask for a voluntary contribution. To test a new campaign, they recently sent letters to a random sample of 100,000 potential donors and received 4781 donations. (a) Give a 95% confidence interval for the true proportion of those from their entire maling list who may donate. (b) A staff member thinks that the true rate is 4.6%. Given the confidence interval you found, do you find that rate plausible? (a) What is the 95% confidence interval? The 95% confidence interval is from ◻% to ◻%. (Round to two decimal places as needed.)
Statistics United States Mar 31, 2025
The batteries from a certain manufacturer have a mean lifetime of 840 hours, with a standard deviation of 70 hours. Assuming that the lifetimes are normally distributed, complete the following statements. (a) Approximately 99.7% of the batteries have lifetimes between ◻ hours and ◻ hours. (b) Approximately 3 B of the batteries have lifetimes between 700 hours and 980 hours.
Statistics United States Mar 31, 2025
The Paralyzed Veterans of America is a philanthropic organization that relies on contributions. They send free mailing labels and greeting cards to potential donors on theif list and ask for a voluntary contribution. To test a new campaign, they recently sent letters to a random sample of 100,000 potential donors and received 4781 donations. (a) Give a 95% confidence interval for the true proportion of those from their entire mailing list who may donate. (b) A staff member thinks that the true rate is 4.6%. Given the confidence interval you found, do you find that rate plausible? (a) What is the 95% confidence interval? The 95% confidence interval is from ◻% to ◻%. (Round to two decimal places as needed.)
Statistics United States Mar 31, 2025
Prev Next
Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy
Pop-up title
Lorem ipsum dolor sit amet, te everti debitis assentior nam, ne illum utroque principes sed. Ridens phaedrum an vix, qui in dolore appareat.