People claim that women say more words per day than men. Estimates claim that a woman...
People claim that women say more words per day than men. Estimates claim that a woman uses roughly 20,000 words per day, while a man uses approximately 7,000. To investigate this, a researcher recorded conversations of male college students over a 5-day period. The results are as follows:
7220 13932 4727 10419
9258 9717 10728 5265
12215 9944 7979 12252
9307 9086 10780 3357
The researcher believes that many use more than 7,000 words per day.
a) State the problem in your own words.
b) Create a plan for testing the researcher's claim. Be sure to state the null and alternate hypotheses.
c) Carry out the appropriate hypothesis test. Begin by finding the sample mean and standard deviation. Give the value of the t statistic and give the p-value (or an estimate).
d) Formulate the statistical conclusion in terms of the null hypothesis and a practical conclusion. You may compare the p-value to 0.05 to determine if the null hypothesis should be rejected. When the p-value is less than 0.05, we reject the null hypothesis, otherwise we fail to reject the null.
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People claim that women say more words per day than men.
Estimates claim that a woman...
20.37 Men of few words? Researchers claim that women speak signif words per day than men. One est...
20.37 Men of few words? Researchers claim that women speak signif words per day than men. One estimate is that a woman uses about 20,000 words per day while a man uses about 7,000. To investigate such claims, one study used a special device to record the conversations of male and female university students over a four-day period. From these recordings, the daily word counts of the 20 men in the study were determined. Here are their daily word counts:24...
(20.37) Researchers claim that women speak significantly more words per day than men. One estimate is...
(20.37) Researchers claim that women speak significantly more words per day than men. One estimate is that a woman uses about 20,000 words per day while a man uses about 7,000. To investigate such claims, one study used a special device to record the conversations of male and female university students over a four- day period. From these recordings, the daily word count of the 20 men in the study was determined. Here are their daily word counts 28406 10578...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducte...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
< Question 15 of 18 > Researchers claim that women speak significantly more words per day...
< Question 15 of 18 > Researchers claim that women speak significantly more words per day than men. One estimate is that a woman uses about 20,000 words per day while a man uses about 7,000. To investigate such claims, one study used a special device to record the conversations of male and female university students over a four-day period. From these recordings, the daily word count of the 20 men in the study was determined. The table contains their...
The accompanying table gives results from a study of words spoken in a day by men...
The accompanying table gives results from a study of words spoken in a day by men and women. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the numbers of words spoken in a day by men vary more than the numbers of words spoken in a day by women. Men Women 186 210 15,668.6 16,215.3 8,632.9 7,301.2 What are the null and alternative hypotheses?...
A researcher wishes to test the claim that the average number of Apple iPad sold per...
A researcher wishes to test the claim that the average number of Apple iPad sold per week is different than the average number of Samsung Galaxy Tab sold per week in a local wireless store. If random sample of 12 weeks is selected for both tablets and the test value is t -1.86, what is your decision using the P-value interval with a-0.05? 0.05 P>0.025, reject the null hypothesis 0.10> P>0.05, do not reject the null hypothesis 0.20 P>10 do...
Listed below are the numbers of words spoken in a day by each member of eight...
Listed below are the numbers of words spoken in a day by each member of eight different randomly selected couples. Complete parts (a) and (b) below. Male 16,054 27,338 1411 8019 19,507 15,326 13,597 25,343 Female 25,186 13,173 18,067 17,119 13,192 17,360 16,313 18,554 a. Use a 0.05 significance level to test the claim that among couples, males speak fewer words in a day than females.In this example, μd is the mean value of the differences d for the population...
The accompanying table gives results from a study of words spoken in a day by men...
The accompanying table gives results from a study of words spoken in a day by men and women. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the numbers of words spoken in a day by men vary more than the numbers of words spoken in a day by women. Men 185 Women 212 15,667.7 6,214.3 8,632.1 7,301.9 What are the null and altenative hypotheses?...
1.) Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim. A...
1.) Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim. A researcher claims that 62% of voters favor gun control. Assuming that a hypothesis test to reject this claim has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms. Group of answer choices There is not sufficient evidence to support the claim that 62% of voters favor gun control. There is not sufficient evidence to...
Test the claim that the proportion of people who own cats is smaller than 80% at...
Test the claim that the proportion of people who own cats is smaller than 80% at the 0.05 significance level The null and alternative hypothesis would be: H: H: = 0.8 H.:P = 0.8 H.:P = 0.8 >0.8 Hp > 0.8 H P 0.8 H:u=0.8 H.:P = 0.8 H: = 0.8 0.8 H:p < 0.8 H H < 0.8 O The test is: left-tailed right-tailed two-tailed O Based on a sample of 200 people, 146 owned cats What is pto...
20.37 Men of few words? Researchers claim that women speak signif words per day than men. One estimate is that a woman uses about 20,000 words per day while a man uses about 7,000. To investigate such claims, one study used a special device to record the conversations of male and female university students over a four-day period. From these recordings, the daily word counts of the 20 men in the study were determined. Here are their daily word counts:24...
(20.37) Researchers claim that women speak significantly more words per day than men. One estimate is that a woman uses about 20,000 words per day while a man uses about 7,000. To investigate such claims, one study used a special device to record the conversations of male and female university students over a four- day period. From these recordings, the daily word count of the 20 men in the study was determined. Here are their daily word counts 28406 10578...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
< Question 15 of 18 > Researchers claim that women speak significantly more words per day than men. One estimate is that a woman uses about 20,000 words per day while a man uses about 7,000. To investigate such claims, one study used a special device to record the conversations of male and female university students over a four-day period. From these recordings, the daily word count of the 20 men in the study was determined. The table contains their...
The accompanying table gives results from a study of words spoken in a day by men and women. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the numbers of words spoken in a day by men vary more than the numbers of words spoken in a day by women. Men Women 186 210 15,668.6 16,215.3 8,632.9 7,301.2 What are the null and alternative hypotheses?...
A researcher wishes to test the claim that the average number of Apple iPad sold per week is different than the average number of Samsung Galaxy Tab sold per week in a local wireless store. If random sample of 12 weeks is selected for both tablets and the test value is t -1.86, what is your decision using the P-value interval with a-0.05? 0.05 P>0.025, reject the null hypothesis 0.10> P>0.05, do not reject the null hypothesis 0.20 P>10 do...
The accompanying table gives results from a study of words spoken in a day by men and women. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the numbers of words spoken in a day by men vary more than the numbers of words spoken in a day by women. Men 185 Women 212 15,667.7 6,214.3 8,632.1 7,301.9 What are the null and altenative hypotheses?...
Test the claim that the proportion of people who own cats is smaller than 80% at the 0.05 significance level The null and alternative hypothesis would be: H: H: = 0.8 H.:P = 0.8 H.:P = 0.8 >0.8 Hp > 0.8 H P 0.8 H:u=0.8 H.:P = 0.8 H: = 0.8 0.8 H:p < 0.8 H H < 0.8 O The test is: left-tailed right-tailed two-tailed O Based on a sample of 200 people, 146 owned cats What is pto...
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