Question

In: Math

According to a​ publication, 12.3​% of 18 to 25 dash year dash olds were users of...

According to a​ publication, 12.3​% of 18 to 25 dash year dash olds were users of marijuana in 2000. A recent poll of 1293 randomly selected 18 to 25 dash year dash olds revealed that 176 currently use marijuana. At the 5​% significance​ level, do the data provide sufficient evidence to conclude that the percentage of 18 to 25 dash year dash olds who currently use marijuana has changed from the 2000 percentage of 12.3​%? Use the​ one-proportion z-test to perform the appropriate hypothesis​ test, after checking the conditions for the procedure. What are the hypotheses for the​ one-proportion z-test? Upper H 0​: pequals nothing​; Upper H Subscript a​: p ▼ greater than not equals less than nothing ​(Type integers or​ decimals.)

Solutions

Expert Solution


Related Solutions

Supposed you were asked to estimate the proportion of 25-30 year olds that have a home...
Supposed you were asked to estimate the proportion of 25-30 year olds that have a home (land line) telephone. In order to make this estimate, you polled 600 people in this age range and the bellows were reported below: [25] pts. Total]             Home Phone              Frequency             NO                                    450             YES                                  150                                                         600 1. What is the proportion of the sample that report YES, they have a home phone line? [5 pts] 2. What condition must be met in...
Hw 28 #2 A recent poll of 2500 randomly selected 18-25-year-olds revealed that 290 currently use...
Hw 28 #2 A recent poll of 2500 randomly selected 18-25-year-olds revealed that 290 currently use marijuana or hashish. According to a publication, 12.5 % of 18-25-year-olds were current users of marijuana or hashish in 1997. Do the data provide sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.5 %? Use α=0.01 significance level. test statistic z= positive critical z score= negative critical z score= The...
(1 point) A recent poll of 2300 randomly selected 18-25-year-olds revealed that 266 currently use marijuana...
(1 point) A recent poll of 2300 randomly selected 18-25-year-olds revealed that 266 currently use marijuana or hashish. According to a publication, 12.5% of 18-25-year-olds were current users of marijuana or hashish in 1997. Do the data provide sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.5%? Use α=0.01 significance level. test statistic z= positive critical z score     negative critical z score      The final conclusion is...
A recent survey reported that 57% to 18 to 29 year olds in a certain country...
A recent survey reported that 57% to 18 to 29 year olds in a certain country own tablets. Using the binomial distribution , complete parts a through e below. a. What is the probability that in the next six​ 18- to​ 29-year-olds surveyed, four will own a​ tablet? b. What is the probability that in the next six? 18- to? 29-year-olds surveyed, all six will own a? tablet? c. What is the probability that in the next six? 18- to?...
A study indicates that 18- to 24- year olds spend a mean of 145 minutes watching...
A study indicates that 18- to 24- year olds spend a mean of 145 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normally distributed and that the standard deviation is 15 minutes. Complete parts (a) through (d) below. a. What is the probability that an 18- to 24-year-old spends less than 115 minutes watching video on his or her smartphone per month? The probability that an 18- to...
A study indicates that​ 18- to​ 24- year olds spend a mean of 115 minutes watching...
A study indicates that​ 18- to​ 24- year olds spend a mean of 115 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normally distributed and that the standard deviation is 15 minutes. Complete parts​ (a) through​ (d) below. a. What is the probability that an​ 18- to​ 24-year-old spends less than 95 minutes watching video on his or her smartphone per​ month? ​(Round to four decimal...
3. A Nielsen study indicates that 18 to 24 year olds spend a mean of 135...
3. A Nielsen study indicates that 18 to 24 year olds spend a mean of 135 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normally distributed and that the standard deviation is 15 minutes. a. What is the probability that an 18-to 24 year old spends less than 112 minutes watching video on his or her smartphone per month? b. What is the probability that an...
A study indicates that​ 18- to​ 24- year olds spend a mean of 115 minutes watching...
A study indicates that​ 18- to​ 24- year olds spend a mean of 115 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normally distributed and that the standard deviation is 10 minutes. Complete parts​ (a) through​ (d) below. a. What is the probability that an​ 18- to​ 24-year-old spends less than 100 minutes watching video on his or her smartphone per​ month? b.What is the probability...
A study indicates that​ 18- to​ 24- year olds spend a mean of 135 minutes watching...
A study indicates that​ 18- to​ 24- year olds spend a mean of 135 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normally distributed and that the standard deviation is 20 minutes. a. What is the probability that an​ 18- to​ 24-year-old spends less than 95 minutes watching video on his or her smartphone per​ month? b. What is the probability that an​ 18- to​ 24-year-old...
A study indicates that​ 18- to​ 24- year olds spend a mean of 140140 minutes watching...
A study indicates that​ 18- to​ 24- year olds spend a mean of 140140 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normally distributed and that the standard deviation is 1515 minutes. Complete parts​ (a) through​ (d) below. a. What is the probability that an​ 18- to​ 24-year-old spends less than 120120 minutes watching video on his or her smartphone per​ month?The probability that an​ 18-...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT