Elementary Statistics (13th Edition)
13th Edition
ISBN: 9780134462455
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 11.2, Problem 2BSC
Ear Preference for Cell Phone Use
2. Hypotheses Refer to the data given in Exercise 1 and assume that the requirements are all satisfied and we want to conduct a hypothesis test of independence using the methods of this section. Identify the null and alternative hypotheses.
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Chapter 11 Solutions
Elementary Statistics (13th Edition)
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- female results male results sample size=14 sample mean= 1800 sample stand dev= 400 sample size= 11 sample mean= 2500 sample stand dev= 250 5% significance level 1. state the null and alternative hypotheses 2. what is the test statistic and p-value (show work ) 3. make a decision about the null hypothesis and whyarrow_forwardUse technology to find the P-value for the hypothesis test described below. The claim is that for a smartphone carrier's data speeds at airports, the mean is u = 12.00 Mbps. The sample size isn= 19 and the test statistic is t= - 2.084. P-value = (Round to three decimal places as needed.)arrow_forwardGiven the situation below, create a problem and determine (a) the null and alternative hypotheses, (b) test statistic, (c) rejection region, and (d) applicability of the CLT.arrow_forward
- I have 20 chickens and I average 16 eggs per day. Using this data, how would I find the null and alternative hypotheses. Define the population parameter, the appropriate test statistic formula, and if the hypothesis test is left-tailed, right-tailed, or two-tailed. Be sure to set up your hypotheses, too. How did you decide on constructing these hypotheses? What level of significance would you use? Why? The population parameters that you should use for this discussion are: μ: the population mean or p: the population proportion Be sure to include numerical values for your variables. Additionally, identify the Type I and Type II Errors that could occur with your decision‐making process.arrow_forwardThe critical boundaries for a hypothesis test are z = +1.96 and -1.96. If the z-score for the sample data is z =-1.90, what is the correct statistical decision? Reject H0 Fail to reject H1 Reject H1 Fail to reject H0arrow_forwardA random sample of 15 families representing three social classes has been observed for the frequency with which the parents administer physical punishment to the children over a period of a week. Are the differences significant? Use α = .05 and the five-step model to conduct your hypothesis test. Write a sentence or two interpreting your results. Working Class: 10,9,4,2,1 Middle Class: 11,10,5,2,0 Upper Class: 7,5,2,0,0arrow_forward
- For all hypothesis testing, you must use the five-step method. A researcher wants to compare Natural Sciences students and Liberal Arts students in terms of how many books they read per year (other than those required for their courses). She takes samples of the two types of student and gets the following results: Natural Sciences Liberal Arts (Number of books read) __ X1 = 13.7 X2 = 16.2 s1 = 9.0 s2 = 2.3 n1 = 45 n2 = 41 The researcher develops a hunch that in the population, Natural Science students read fewer books than Liberal Arts…arrow_forwardHW Score: 0%, 0 of 60 pts Question Help ▼ For the following hypothesis test, determine the null and altemative hypotheses. Also, classify the hypothesis test as two tailed, left tailed, or right tailed. The mean local monthly bill for cell phone users in this country was $52.52 in 2001. A hypothesis test is to be performed to determine whether last year's mean local monthly bill for cell phone users has decreased from the 2001 mean of $52.52. Choose the correct null and alternative hypotheses below. O A. Ho: u= $52.52 O B. Ho u#$52.52 H: u> $52.52 OC. Ho: u# $52 .52 H: u $52.52 O E. Ho: u=552.52 H u#$52.52 OF. Ho: u#$52.52 Ha: # = $52.52arrow_forwardWhat is the hypothesis test should be used in this problem: Has the mortality rate reduced for lung cancer caused by smoking? one-tailed t-test two-tailed t-test one tailed z-test two-tailed z-test What is the hypothesis test should be used in this problem: Is there a difference between the blood sugar levels of male & female? one-tailed t-test two-tailed t-test one tailed z-test two-tailed z-testarrow_forward
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