Question

For each problem a) State the null and alternative hypotheses, b) Verify that the requirements that...

For each problem a) State the null and alternative hypotheses, b) Verify that the requirements that allow use of the normal model to test the hypothesis are satisfied, c) Show work for calculating the test statistic, d) Compare the critical value with the test statistic, and e) State the conclusion.

The standard deviation of the waiting times experienced by patients in the minor emergency department of a local hospital is 0.5 minutes. A random sample of 25 waiting times has a standard deviation of 0.7 minutes. Is there enough evidence to conclude that the standard deviation of the waiting times is more than 0.5 minutes? Use an α = 0.10 level of significance.  Assume the population is normally distributed.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
For each problem a) State the null and alternative hypotheses, b) Verify that the requirements that...
For each problem a) State the null and alternative hypotheses, b) Verify that the requirements that allow use of the normal model to test the hypothesis are satisfied, c) Show work for calculating the test statistic, d) Compare the critical value with the test statistic, and e) State the conclusion. 1) The proportion of people who cover their mouth when they sneeze is 0.733. Sue observed 150 randomly selected people sneeze and found that 114 covered their mouth when they...
a) State the null and alternative hypotheses, b) Verify that the requirements that allow use of...
a) State the null and alternative hypotheses, b) Verify that the requirements that allow use of the normal model to test the hypothesis are satisfied, c) Show work for calculating the test statistic, d) Compare the critical value with the test statistic, and e) State the conclusion. The mean annual cost of raising a child (age 2 and under) by husband-wife families in the U.S. is $13,960. In a random sample of husband-wife families in the U.S., the mean annual...
A hospital spokesperson claims that the standard deviation of the waiting times experienced by patients in...
A hospital spokesperson claims that the standard deviation of the waiting times experienced by patients in its minor emergency department is no more than 0.4 minutes. A random sample of 22 waiting times has a standard deviation of 0.9 minutes. At alphaequals 0.05​, is there enough evidence to reject the​ spokesperson's claim? Assume the population is normally distributed. Complete parts​ (a) through​ (e) below. a- Write the claim mathematically and identify H0 & Ha b-find critical Value(s) c-find Standaridized test...
For each of the following studies, state both the null and alternative hypotheses and the decision...
For each of the following studies, state both the null and alternative hypotheses and the decision rule, then work the problem. Look up the critical value of t that would cut off the tails of the distribution. Note that each study specifies the alpha value to use and whether to use a one- or two-tailed test. Decide whether to reject or fail to reject the null and answer the question. The first example does not include a sample size, I...
a) Identify the claim: state the null and alternative hypotheses. b) Determine the test: left-tailed, right-tailed,...
a) Identify the claim: state the null and alternative hypotheses. b) Determine the test: left-tailed, right-tailed, or two-tailed. c) Identify the degree of freedom and determine the critical value. d) Graph your bell-shaped curve and label the critical value. e) Find your standardized test statistic ? and label it on your graph. f) Decide whether to reject or fail to reject the null hypothesis. g) Interpret your result. A dealership projected that the mean waiting time at a dealership is...
Two hospital emergency rooms use different procedures for triage of their patients. A local health care...
Two hospital emergency rooms use different procedures for triage of their patients. A local health care provider conducted a study to determine if there is a significant difference in the mean waiting time of patients for both hospitals. The 40 randomly selected subjects from Medina General Hospital (population 1) produce a mean waiting time of 18.3 minutes and a standard deviation of 2.1 minutes. The 50 randomly selected patients from Southwest General Hospital (population 2) produce a mean waiting time...
1) For each problem, state the null and alternative hypotheses, calculate the critical value(s) of the...
1) For each problem, state the null and alternative hypotheses, calculate the critical value(s) of the statistic by which you would reject the null hypothesis and state whether or not you would reject the null hypothesis for a level α specified by each problem. If the hypothesis test requires an unpaired t-test, then you may assume that the population variances are equal. Then calculate the appropriate statistic value by hand and use the appropriate probability table to obtain the exact...
a) State the null and alternative hypothesis. b) Select the distribution to use. c) Write the...
a) State the null and alternative hypothesis. b) Select the distribution to use. c) Write the decision rule. (Define the rejection region.) d) Calculate the test statistic. e) Calculate the p-value. f) Make a decision. g) (Additional step for this worksheet) State the type I and II error in context of the problem. It has been reported that the average credit card debt for college seniors at the college book store for a specific college is $3262. The student senate...
A local retailer claims that the mean waiting time is less than 7 minutes. A random...
A local retailer claims that the mean waiting time is less than 7 minutes. A random sample of 20 waiting times has a mean of 5.5 minutes with a standard deviation of 2.1 minutes. At α = 0.01, test the retailer's claim. Assume the distribution is normally distributed. Round the test statistic to the nearest thousandth. a) State the Null and Alternate Hypotheses. b) Is this a left, right or two-tailed test? c) Find the sample test statistic. d) Use...
a. Please state both the null and alternative hypotheses for this question. b. Provide the decision...
a. Please state both the null and alternative hypotheses for this question. b. Provide the decision rule for making this decision. Use an alpha level of .05. c. Show all the work necessary to calculate the appropriate statistic. d. What conclusion are you allowed to draw? Write a conclusions sentence in APA format (i.e., it includes the appropriate statistical information). In a study of the effectiveness of an antipsychotic drug, patients treated with the drug were compared to patients receiving...