Question

# A researcher is testing whether the percentage of freshmen at the school is greater than 30%....

A researcher is testing whether the percentage of freshmen at the school is greater than 30%. Which of the following would represent a Type I error?

The researcher concludes that the percentage of freshmen at the school is greater than 30%, but the true percentage is not greater than 30%.

The researcher concludes that the percentage of freshmen at the school is greater than 30%, but the true percentage is equal to 30%.

The researcher concludes that the percentage of freshmen at the school is equal to 30%, but the true percentage is greater than 30%.

The researcher concludes that the percentage of freshmen at the school is equal to 30%, but the true percentage is not equal 30%.

Correct option is:

The researcher concludes that the percentage of freshmen at the school is greater than 30%, but the true percentage is not greater than 30%.

#### Earn Coins

Coins can be redeemed for fabulous gifts.

Similar Homework Help Questions
• ### 1. A university researcher is interested in whether efforts to recruit more top high school students...

1. A university researcher is interested in whether efforts to recruit more top high school students have been successful. To test this, she randomly selects 50 freshmen from the university and records their high school GPA. The mean is 2.75 with a standard deviation of 0.50. The researcher also knows that the mean high school GPA of all freshmen enrolled at the university five years ago was 3.00 with a standard deviation of 0.66. The researcher wants to know if...

• ### A researcher wants to assess the mean cost of textbooks for one class is greater than...

A researcher wants to assess the mean cost of textbooks for one class is greater than \$130. Determine which statement is true regarding errors. If a sample evidence leads the researcher to believe that the mean cost is not greater than \$130 when, in fact, the mean cost is greater than \$130, then type Il error is made. If a sample evidence leads the researcher to believe that the mean cost is greater than \$130 when, in fact, the mean...

• ### A researcher asks: Are high school students who have tried alcohol more likely to have had...

A researcher asks: Are high school students who have tried alcohol more likely to have had sex than students who have never had alcohol? Using the data from the YRBS study, the researcher finds that only 16.7% of high school students who have never tried alcohol have had sex, whereas 56.3% of high school students who have tried alcohol have had sex. Based on these findings, the researcher concludes that drinking alcohol causes high school students to have sex. What...

• ### pus An education researcher is studying whether adults over 25 years old in the US, are...

pus An education researcher is studying whether adults over 25 years old in the US, are becoming better educated as a group. Specifically, she wishes to test whether the proportion of adults in this age range with an associate's degree or higher le, two or more years of college is greater than 0.42, which is the most recent proportion reported by the US Census. She will conduct the test at the 0.05 level of significance. Regardless of your answers to...

• ### 1) The area that is less than 4 (<4) and the area that is greater than...

1) The area that is less than 4 (<4) and the area that is greater than or equal to 4 (≥4) would be considered ______. Group of answer choices complements a continuous distribution binomial outcomes z scores 2) As the z-score decreases, the cumulative area under the curve to the left of that value will _______. Group of answer choices increase go to 1 decrease remain the same 3) As the z-score increases, the cumulative area under the curve to...

• ### If a researcher believed that the average young adult (under age 30) carries less than \$10...

If a researcher believed that the average young adult (under age 30) carries less than \$10 in cash with them, then the Null Hypothesis for the hypothesis test should be: a) The mean is less than \$10 b) The mean is not equal to \$10 c) The mean is equal \$10 d) The mean is at most \$10 For a hypothesis test, a sample is gathered. The sample mean and P-value are found. What is the meaning of the P-value?...

• ### 1. In testing hypotheses, the researcher initially assumes that the alternative hypothesis is true and uses the sample d...

1. In testing hypotheses, the researcher initially assumes that the alternative hypothesis is true and uses the sample data to reject it. True False 2. The first step in testing a hypothesis is to establish a true null hypothesis and a false alternative hypothesis. True False 6. The power curve provides the probability of Correctly accepting the null hypothesis Incorrectly accepting the null hypothesis Correctly rejecting the alternative hypothesis Correctly rejecting the null hypothesis 7. Suppose that                  Ho: μ ≤...

• ### Hypothesis Testing . It is claimed that the mean IQ of statistics instructors is greater than...

Hypothesis Testing . It is claimed that the mean IQ of statistics instructors is greater than 120. Write the null and alternative hypothesis statements . A dean at JWU claims that the mean time for students to eam a Master's Degree in Business is at most 5.2 years. Write the null and alternative hypothesis statements. A researcher claims that 65% of voters favor gun control. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed The mean...

• ### Hypothesis Testing . It is claimed that the mean IQ of statistics instructors is greater than...

Hypothesis Testing . It is claimed that the mean IQ of statistics instructors is greater than 120. Write the null and alternative hypothesis statements . A dean at JWU claims that the mean time for students to eam a Master's Degree in Business is at most 5.2 years. Write the null and alternative hypothesis statements. A researcher claims that 65% of voters favor gun control. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed The mean...

• ### A college Statistics student randomly surveys 200 fellow students to determine whether students on campus prefer...

A college Statistics student randomly surveys 200 fellow students to determine whether students on campus prefer Cheetos or Doritos for their favorite study snack. The Statistics student rejects the null hypothesis that the proportion who prefer Cheetos is 0.5. Later a marketing firm surveys a large number of UMW students and concludes that there is no statistically significant difference between the students preference for Cheetos versus Doritos. Answer whether there was a Type I error, Type II error, or neither...