Question

In: Statistics and Probability

​Claim: Fewer than 95​% of adults have a cell phone. In a reputable poll of 1234...

​Claim: Fewer than

95​% of adults have a cell phone. In a reputable poll of 1234 ​adults, 90​% said that they have a cell phone. Find the value of the test statistic.

Solutions

Expert Solution

We have for given example,              
Population proportion value is =0.95          
  
              
n=1234          
          
Estimate for sample proportion =0.9          
              
Z test statistic formula for proportion              


=-8.06      

orchestra answered 1 year ago
Next > < Previous

Related Solutions

A study is conducted to test a claim that fewer than 65% of adults believe there...
A study is conducted to test a claim that fewer than 65% of adults believe there is intelligent life elsewhere in the galaxy. In a survey of 80 adults, 48 indicated they believe there is intelligent life elsewhere in the galaxy. Test the claim at the 0.10 level of significance. Select the correct P-value and conclusion. Group of answer choices P = 0.3484, Do not reject H0 P = 0.1742, Do not reject H0 P = 0.1742, Reject H0 P...
How did you use your cell phone? A Pew Internet poll asked cell phone owners about...
How did you use your cell phone? A Pew Internet poll asked cell phone owners about how they used their cell phones. One question asked whether or not during the past 30 days they had used their phone while in a store to call a friend or family member for advice about a purchase they were considering. The poll surveyed 1003 adults living in the United States by telephone. Of these, 462 responded that they had used thier cell phone...
You wish to test the claim that fewer than 33% of households in a certain city...
You wish to test the claim that fewer than 33% of households in a certain city own pets. [3 points] Give the null and alternate hypotheses. [2 points] Is the test right-tailed, left-tailed or two-tailed? The P-value was found to be 0.0673, Choose using a significance level of 5%: Reject the null hypothesis or Fail to reject the null hypothesis Give the conclusion about the claim in an English sentence in the context of the scenario. A person wants to...
a). Consider the following. Fewer than 5% of adults in Los Angeles ride the bus to...
a). Consider the following. Fewer than 5% of adults in Los Angeles ride the bus to work. State the Type I and Type II errors in complete sentences. Type I error: We believe that at least 5% of adults in Los Angeles ride the bus to work when the percentage really is fewer than 5%. Type II error: We believe that fewer than 5% of adults in Los Angeles ride the bus to work when the percentage really is greater...
At the end of 2013, it was reported that 92% of U.S. adults owned a cell-phone....
At the end of 2013, it was reported that 92% of U.S. adults owned a cell-phone. If a sample of 10 U.S. adults is selected, what is the probability that: 8 own a cell phone? All ten own a cell phone? At least 8 own a cell phone? Between 6 and 8 own a cell phone (including 6 and 8)?
A poll of 2,160 randomly selected adults showed that 92​% of them own cell phones. The...
A poll of 2,160 randomly selected adults showed that 92​% of them own cell phones. The technology display below results from a test of the claim that 91​% of adults own cell phones. Use the normal distribution as an approximation to the binomial​ distribution, and assume a 0.01 significance level to complete parts​ (a) through​ (e). Test of p=0.91 vs p≠0.91 Sample=1 x=1,981 n=2,160 sample p= .917130 95%CI= ​(0.901850,0.932409) z-value=1.16 p-value= .247
A poll of 2017 randomly selected adults showed that 92% of them own cell phones. The...
A poll of 2017 randomly selected adults showed that 92% of them own cell phones. The technology display below results from a test of the claim that 93​% of adults own cell phones. Use the normal distribution as an approximation to the binomial​ distribution, and assume a 0.01 significance level to complete parts​ (a) through​ (e). Test of p=0.93 vs p≠0.93 Sample X N Sample p ​95% CI ​Z-Value ​P-Value 1 1849 2,017 0.916708 ​(0.900860​,0.932556​) −2.34 0.019 a) Is the...
Why are cell phone data plans cheaper in Europe? Why might cell phone data plans have...
Why are cell phone data plans cheaper in Europe? Why might cell phone data plans have different prices across markets?
14. Claim: The average cost to repair a smart phone is less than $100. Test at...
14. Claim: The average cost to repair a smart phone is less than $100. Test at α = 0.1. Data: 7 smart phone repairs are chosen at random. The average of these is $95.56, with a standard deviation of $20. (a) Are these data statistically significant evidence to support the claim? (b) Are these data statistically significant evidence to refute the claim?
In a study of 420,017 cell phone users,180 subjects developed brain cancer. Test the claim that...
In a study of 420,017 cell phone users,180 subjects developed brain cancer. Test the claim that cell phone users develop brain cancer at a rate that is different from the rate of 0.0340% for people who do not use cell phones. Because this issue has such great importance, use a 0.005 significance level. Use this information to answer the following questions. What is the test​ statistic? What is the​ P-value?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT