Marketers believe that 93% of adults in California own a cell phone. A cell phone manufacturer...
Marketers believe that 93% of adults in California own a cell phone. A cell phone manufacturer believes that number is actually lower. 220 Californians are surveyed, of which 90% report having cell phones. Use a 1% level of significance to test the manufacturer’s hypothesis. (6 points) a. H0 : b. Ha : c. What is the test statistic? d. What is the p-value? e. Indicate the correct decision, reason for it, and write an appropriate conclusion using complete sentences. i. α = ii. Decision: iii. Reason for decision: iv. Conclusion: f. According to the hypothesis test you conducted using this survey data, is there evidence to support the manufacture’s hypothesis that fewer than 93% of Californians own cell phones? (Please give a yes/no answer.)
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Marketers believe that 93% of adults in California own a cell
phone. A cell phone manufacturer...
A poll of 2,142 randomly selected adults showed that 92% of them own cell phones. The...
A poll of 2,142 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 0.05 significance level to complete parts (a) through (e). Test of p=0.91 vs p≠0.91 Sample X N Sample p 95% CI Z-Value P-Value 1 1970 2,142 0.919701 (0.908193,0.931210) 1.57 0.117 a. Is the...
Claim: Fewer than 93% of adults have a cell phone. In a reputable poll of 1053 adults
Claim: Fewer than 93% of adults have a cell phone. In a reputable poll of 1053 adults, said that they have a cell phone. Find the value of the test statistic. The value of the test is _______ Round to two decimal places as needed
1. Claim Fewer than 97 % of adults have a cell phone
1. Claim Fewer than 97 % of adults have a cell phone. In a reputable poll of 1038 adults, 89 % said that they have a cell phone. Find the value of the test statistic.2. The test statistic of z=1.38 is obtained when testing the claim that p>0.2a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed.b. Find the P-value by the calculator or by the table.c. Using a significance level of α=0.05 should we reject H₀ or should...
a poll of 2094 randomly selected adults showed that 94% of them own cell phones A...
a poll of 2094 randomly selected adults showed that 94% of
them own cell phones
A poll of 2,094 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the claim that 92% 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 = 0.92 vs p*0.92 Samplex N...
a 2012 survey of 2254 american adults indicate that 17% of cell phone owners do their...
a 2012 survey of 2254 american adults indicate that 17% of cell phone owners do their browsing on their phone rather than a computer or other device. according to an online article, a report from a mobile research company indicates that 38% of chinese mobile web users only acess the internet through their phones. conduct a hypothesis test to determine if these data provide strong evidence that the proportion of americans who only use their phones to access the internet...
5. Researchers conducted a study of smartphone use among adults. A cell phone company calmed that...
5. Researchers conducted a study of smartphone use among adults. A cell phone company calmed that IPhone smartphones are more popular with whites (non-Hispanic) than with African Americans. The results of the survey Indicate that of the 232 African American cell phone owners randomly sampled, 5% have an iPhone. Of the 1,343 white cell phone owners randomly sampled, 10% own an iPhone. Test at the 5% level of significance. Is the proportion of white iPhone owners greater than the proportion...
1.The proportion of adults who own a cell phone in a certain Canadian city is believed...
1.The proportion of adults who own a cell phone in a certain Canadian city is believed to be 70%. Fifty adults are to be selected at random from the city. Let X be the number in the sample who own a cell phone. Under the assumptions given, the distribution of X is A. N(50,15)N(50,15) B. Bin(50,0.7) C. N(35,15)N(35,15) D. Bin(50,35)Bin(50,35) 2. BlueSky Air has the best on-time arrival rate with 75% of its flights arriving on time. A test is...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The technology display below ret from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the bin distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p+0.92 Z-Value P-value Sample p 95% CI N Sample X 0.000 4.01 (0.930869,0.956847) 1 1967 2,084 0.943858 a....
Suppose that students own an average of 4 pairs of jeans. 8 people from your class were surveyed to determine if the ave...
Suppose that students own an average of 4 pairs of jeans. 8 people from your class were surveyed to determine if the average for students in college is higher than 4. DATA TO USE: 3, 4, 4, 5, 5, 5, 7, 12 A) In words, CLEARLY state what your random variable X or P' represents. B) State the distribution to use for the test. If t, include the degrees of freedom. If normal, include the mean and standard deviation. C)...
PART F PART i In 1955, Life Magazine reported that a 25-year-old mother of three worked,...
PART F PART i
In 1955, Life Magazine reported that a 25-year-old mother of three worked, on average, an 80 hour week. Recently, many groups have been studying whether or not the women's movement has, in fact, resulted in an increase in the average work week for women (combining employment and at-home work). Suppose a study was done to determine if the mean work week has increased. 68 women were surveyed with the following results. The sample mean was 83;...
a poll of 2094 randomly selected adults showed that 94% of
them own cell phones
A poll of 2,094 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the claim that 92% 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 = 0.92 vs p*0.92 Samplex N...
5. Researchers conducted a study of smartphone use among adults. A cell phone company calmed that IPhone smartphones are more popular with whites (non-Hispanic) than with African Americans. The results of the survey Indicate that of the 232 African American cell phone owners randomly sampled, 5% have an iPhone. Of the 1,343 white cell phone owners randomly sampled, 10% own an iPhone. Test at the 5% level of significance. Is the proportion of white iPhone owners greater than the proportion...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The technology display below ret from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the bin distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p+0.92 Z-Value P-value Sample p 95% CI N Sample X 0.000 4.01 (0.930869,0.956847) 1 1967 2,084 0.943858 a....
PART F PART i
In 1955, Life Magazine reported that a 25-year-old mother of three worked, on average, an 80 hour week. Recently, many groups have been studying whether or not the women's movement has, in fact, resulted in an increase in the average work week for women (combining employment and at-home work). Suppose a study was done to determine if the mean work week has increased. 68 women were surveyed with the following results. The sample mean was 83;...
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