Geoff has been running a restaurant in the city for many years. He knows from experience...
Geoff has been running a restaurant in the city for many years. He knows from experience that the proportion of customers that leave tips at this restaurant is 0.67. Geoff has recently opened a restaurant in a suburban area. It seems that tipping habits are different in the suburbs: Geoff believes that the proportion of customers that tip at his new restaurant (p) may be different to 0.67. He conducts a hypothesis test to find out. The null and alternative hypotheses are: H0: p = 0.67 Ha: p ≠ 0.67 Geoff takes a random sample of 119 customers and notes whether or not they leave a tip. In this sample, the proportion of people that leave a tip is 0.71. a)Calculate the test statistic (z). Give your answer to 2 decimal places. z = b)Calculate the P-value. Give your answer as a decimal to 4 decimal places. P-value =
Homework Answers
The statistical software output for this problem is :
z = 0.93
P-value = 0.3534
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Geoff has been running a restaurant in the city for many years.
He knows from experience...
Geoff has been running a restaurant in the city for many years. He knows from experience...
Geoff has been running a restaurant in the city for many years. He knows from experience that the proportion of customers that leave tips at this restaurant is 0.55. Geoff has recently opened a restaurant in a suburban area. It seems that tipping habits are different in the suburbs: Geoff believes that the proportion of customers that tip at his new restaurant (p) may be different to 0.55. He conducts a hypothesis test to find out. The null and alternative...
Suppose Jonathan works for the local transportation authority and knows that for the last few years,...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 347 buses arrived on time. He conducts a one-sample, right-sided z-test...
Suppose Jonathan works for the local transportation authority and knows that for the last few years,...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 347 buses arrived on time. He conducts a one-sample, right-sided z-test...
Suppose Jonathan works for the local transportation authority and knows that for the last few years,...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 346 buses arrived on time. He conducts a one-sample, right-sided z-test...
Suppose Jonathan works for the local transportation authority and knows that for the last few years,...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 328 buses arrived on time. He conducts a one-sample, right-sided z-test...
Suppose Jonathan works for the local transportation authority and knows that for the last few years,...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 347 buses arrived on time. He conducts a one-sample, right-sided z-test...
he proportion of women working in jobs that require analytical skills has been on the rise...
he proportion of women working in jobs that require analytical skills has been on the rise for several decades. A 2018 study by Pew Research showed that the proportion of women working in jobs that require analytical skills was 0.423. An economist wants to determine if the actual proportion of women working in jobs that require analytical skills is different from the value reported by the Pew Research study. A normal distribution is used to carry out the following hypothesis...
People tend to be more generous after receiving good news. Are they less generous after receiving...
People tend to be more generous after receiving good news. Are they less generous after receiving bad news? The average tip left by adult Americans is 21%. Give 20 patrons of a restaurant a message on their bill warning them that tomorrow's weather will be bad and record the percentage tip they leave. Given are the tips as a percentage of the total bil. 18 19.119.2 18.8 18.4 19 18.5 16.1 16.8 18.2 14 1713.6 17.5 20 20.2 18.818 23.2...
updated Question 5 of 9 > People tend to be more generous after receiving good news....
updated
Question 5 of 9 > People tend to be more generous after receiving good news. Are they less generous after receiving bad news? The average tip left by adult Americans is 21%. Give 20 patrons of a restaurant a message on their bill warning them that tomorrow's weather will be bad and record the percentage tip they leave. Given are the tips as a percentage of the total bill. 18 19.1 19.2 18.8 18.4 19 18.5 16.1 16.8 18.2...
Question 16 Jason is a baseball player who has batted both left-handed and right-handed during hi...
Question 16 Jason is a baseball player who has batted both left-handed and right-handed during his career. Among 3,281 left-handed at- bats, he recorded a hit on 810 of them, and he recorded a hit on 670 of 2,412 right-handed at-bats. Perform a two- proportion hypothesis test to determine whether there is a difference in Jason's true batting averages (hits divided byat- bats) between batting left and right-handed. Assume that the conditions for inference are satisfied Usea0.05. Let the eft-handed...
Geoff has been running a restaurant in the city for many years. He knows from experience that the proportion of customers that leave tips at this restaurant is 0.55. Geoff has recently opened a restaurant in a suburban area. It seems that tipping habits are different in the suburbs: Geoff believes that the proportion of customers that tip at his new restaurant (p) may be different to 0.55. He conducts a hypothesis test to find out. The null and alternative...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 347 buses arrived on time. He conducts a one-sample, right-sided z-test...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 347 buses arrived on time. He conducts a one-sample, right-sided z-test...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 346 buses arrived on time. He conducts a one-sample, right-sided z-test...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 328 buses arrived on time. He conducts a one-sample, right-sided z-test...
Suppose Jonathan works for the local transportation authority and knows that for the last few years, only 62% of buses have arrived at their destination on time. However, the city recently completed improvements to the main roads, and Jonathan thinks that a higher proportion of buses now arrive on time because of these improvements. Jonathan collects a random sample of bus arrival times for 500 buses and finds that 347 buses arrived on time. He conducts a one-sample, right-sided z-test...
People tend to be more generous after receiving good news. Are they less generous after receiving bad news? The average tip left by adult Americans is 21%. Give 20 patrons of a restaurant a message on their bill warning them that tomorrow's weather will be bad and record the percentage tip they leave. Given are the tips as a percentage of the total bil. 18 19.119.2 18.8 18.4 19 18.5 16.1 16.8 18.2 14 1713.6 17.5 20 20.2 18.818 23.2...
updated
Question 5 of 9 > People tend to be more generous after receiving good news. Are they less generous after receiving bad news? The average tip left by adult Americans is 21%. Give 20 patrons of a restaurant a message on their bill warning them that tomorrow's weather will be bad and record the percentage tip they leave. Given are the tips as a percentage of the total bill. 18 19.1 19.2 18.8 18.4 19 18.5 16.1 16.8 18.2...
Question 16 Jason is a baseball player who has batted both left-handed and right-handed during his career. Among 3,281 left-handed at- bats, he recorded a hit on 810 of them, and he recorded a hit on 670 of 2,412 right-handed at-bats. Perform a two- proportion hypothesis test to determine whether there is a difference in Jason's true batting averages (hits divided byat- bats) between batting left and right-handed. Assume that the conditions for inference are satisfied Usea0.05. Let the eft-handed...
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