Arecent survey was conducted with a simple random sample of 35 shoppers at the food court in a local mall. the mall claims that the mean price for lunch is less than $4.65. the mean of the sample is $4.49, and the standard deviation of the population of lunch shoppers is $0.36. a p-value of 0.0043 is found using a 0.01 significance level to test the claim that the mean price for lunch is less than $4.65. state the conclusion about the null hypothesis.

fail to accept the null hypothesis

reject the null hypothesis

fail to reject the null hypothesis

accept the null hypothesis

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.

In a tutoring session, 2/3 of an hour was spent reviewing math problems. adelina attended 3/4 of the tutoring session. how much time did adelina spend at the tutoring session?

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.