Mathematics problem solving
178175 questions • Page 146 / 3564
1. A researcher found that the relationship between the appraised value of a hou
1. A researcher found that the relationship between the appraised value of a house (in thousands of dollars) and its age (in years) could be summarized by the regression equation:…
1. A researcher groups college students in a study based on their year in colleg
1. A researcher groups college students in a study based on their year in college (freshman, sophomore, junior, senior) and the type of college they attend (junior, technical, uni…
1. A researcher has a total of 30 employees who were selected from six different
1. A researcher has a total of 30 employees who were selected from six different departments. There were five employees from each department. The employees were tested and score…
1. A researcher has a total of 30 employees who were selected from six different
1. A researcher has a total of 30 employees who were selected from six different departments. There were five employees from each department. The employees were tested and scored …
1. A researcher has asked you to re-evaluate this data below. Only, this time th
1. A researcher has asked you to re-evaluate this data below. Only, this time the researcher has asked you to estimate an OLS model regressing the effect of both the effect of tea…
1. A researcher is interested in identifying how the relationship between the bl
1. A researcher is interested in identifying how the relationship between the blood pressure levels of newborns and infants relate to subsequent adult blood pressure. The research…
1. A researcher is interested in the effect of prenatal alcohol exposure on birt
1. A researcher is interested in the effect of prenatal alcohol exposure on birth weight in rats. She hypothesizes that alcohol will have some sort of effect, either increasing or…
1. A researcher is interested inwhether students who attend private high schools
1. A researcher is interested inwhether students who attend private high schools have higheraverage SAT Scores than students in the general population. Arandom sample of 90 s…
1. A researcher is performing a two-way ANOVA using two factors. The first facto
1. A researcher is performing a two-way ANOVA using two factors. The first factor has 4 levels and the second factor has 5 levels. In the ANOVA Summary Table, the degrees of freed…
1. A researcher is testing the effect of a new cold and flu medication on mental
1. A researcher is testing the effect of a new cold and flu medication on mental alertness. A sample of n = 9 college students is obtained and each student is given the normal dos…
1. A researcher is testing the effect of a new cold and flu medication on mental
1. A researcher is testing the effect of a new cold and flu medication on mental alertness. A sample of n = 9 college students is obtained and each student is given the normal dos…
1. A researcher is testing the hypothesis that consuming a sports drink during e
1. A researcher is testing the hypothesis that consuming a sports drink during exercise will improve endurance. A sample of n = 50 male college students is obtained and each stude…
1. A researcher measures deviant behavior in a sample of 12 children from abusiv
1. A researcher measures deviant behavior in a sample of 12 children from abusive homes (Sample A). Another researcher measures the same behavior in a sample of 18 children from a…
1. A researcher measures the relationship between Internet use (hours per week)
1. A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the h…
1. A researcher measures the relationship between Internet use (hours per week)
1. A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the h…
1. A researcher ran a series of analyses looking at the associations among the b
1. A researcher ran a series of analyses looking at the associations among the burglary rate, robbery rate and assault rate in her home state. She wanted to see if there were any …
1. A researcher reports in a mainstream educational research journal that the st
1. A researcher reports in a mainstream educational research journal that the statistic she calculated had a p >.05. What does this statement mean? a. The probability of this o…
1. A researcher reports in a mainstream educational research journal that the st
1. A researcher reports in a mainstream educational research journal that the statistic she calculated had a p >.05. What does this statement mean? a. The probability of this o…
1. A researcher reports that stress levels among nurses are higher compared to s
1. A researcher reports that stress levels among nurses are higher compared to stress levels in the general population, t(20) = 2.086, p = .05 (d = .12). Was this a one-tailed or …
1. A researcher reports that the effectiveness of a new marketing campaign signi
1. A researcher reports that the effectiveness of a new marketing campaign significantly increased sales compared with the previous campaign strategy, t(49) = 2.562, p < .05. U…
1. A researcher selects a sample of 16 women and asks them to rate how important
1. A researcher selects a sample of 16 women and asks them to rate how important a sense of humor is in someone they want a long-term relationship with. She records scores averagi…
1. A researcher selects a sample of 24 college students and has them rate their
1. A researcher selects a sample of 24 college students and has them rate their liking for two advertisements aimed at improving the image of the college. The researcher finds tha…
1. A researcher studied 32 giant pandas at a reserve. She recorded their daily b
1. A researcher studied 32 giant pandas at a reserve. She recorded their daily bamboo intake (in kg), their height (in cm), and their sex (coded as female=0, male=1). She input he…
1. A researcher wanted to investigate the effects of a high glucose diet on the
1. A researcher wanted to investigate the effects of a high glucose diet on the weight of Syrian hamsters (Mesocricetus auratus). He randomly selected 100 adult hamsters to receiv…
1. A researcher wanted to investigate the effects of a high glucose diet on the
1. A researcher wanted to investigate the effects of a high glucose diet on the weight of Syrian hamsters (Mesocricetus auratus). He randomly selected 100 adult hamsters to receiv…
1. A researcher wanted to investigate the effects of a high glucose diet on the
1. A researcher wanted to investigate the effects of a high glucose diet on the weight of Syrian hamsters (Mesocricetus auratus). He randomly selected 100 adult hamsters to receiv…
1. A researcher wanted to see if there was a relationship between education-atta
1. A researcher wanted to see if there was a relationship between education-attainment level and whether someone smokes or does not smoke. She classified education attainment into…
1. A researcher wants to create a random sample of students at Smart U. A friend
1. A researcher wants to create a random sample of students at Smart U. A friend suggests that the researcher walk across campus and approach every third person she encounters. Is…
1. A researcher wants to determine if there is a relationship between number of
1. A researcher wants to determine if there is a relationship between number of classes students are enrolled in (1,2,3,4,5,etcc.) and stress level scores (measured on a multi-ite…
1. A researcher wants to know if there is a relationship between the heights (si
1. A researcher wants to know if there is a relationship between the heights (sidewalk to roof) of notable tall buildings (measured in feet) in America the number of stories of th…
1. A researcher wants to predict graduate-school grade point average (GPA) from
1. A researcher wants to predict graduate-school grade point average (GPA) from GRE verbal scores (which is what the pesky GRE is supposed to do, anyway!). She gathers data on fif…
1. A researcher wants to predict graduate-school grade point average (GPA) from
1. A researcher wants to predict graduate-school grade point average (GPA) from GRE verbal scores (which is what the pesky GRE is supposed to do, anyway!). She gathers data on fif…
1. A researcher wants to study the effects of exercise in reducing the bone loss
1. A researcher wants to study the effects of exercise in reducing the bone loss in post-menopausal women. She finds 500 post-menopausal women who exercise regularly and she match…
1. A researcher was interested in studying toothpaste effectiveness. In his firs
1. A researcher was interested in studying toothpaste effectiveness. In his first study, he correlated the number of times brushing per day with the number of cavities. For a samp…
1. A researcher wished to test the claim that the rate ofdefectives among the co
1. A researcher wished to test the claim that the rate ofdefectives among the computer of two different manufacturers is thesame. She selected two independent random samples and f…
1. A researcher wishes to see if there is a difference in thecholesterol levels
1. A researcher wishes to see if there is a difference in thecholesterol levels of two groups of men. A random sample of30 men between the ages of 25 and 40 is selected and tested…
1. A researcher wishes to see if there is a difference in thecholesterol levels
1. A researcher wishes to see if there is a difference in thecholesterol levels of two groups of men. A random sample of30 men between the ages of 25 and 40 is selected and tested…
1. A resident in a particular city pays a water bill of $4.75 per month plus $1.
1. A resident in a particular city pays a water bill of $4.75 per month plus $1.56 per 1000 gallons of water used (up to 4000 gallons). If this city has 443,000 customers that use…
1. A restaurant asks a sample of its customers \"How many times per week do you
1. A restaurant asks a sample of its customers "How many times per week do you eat here?" 17 people say "1 time a week", 5 people say "2 times a week", and 2 people say "3 or more…
1. A retirement account has $40,000 in it and earns 12% interest per year compou
1. A retirement account has $40,000 in it and earns 12% interest per year compounded monthly. At the end of every month for the next 12 years you will deposit $200 into this accou…
1. A reversible process has been defined as a process, which having taken place,
1. A reversible process has been defined as a process, which having taken place, can be reversed and in so doing leaves no change in either the system or the surroundings. Six res…
1. A rock is thrown up and to the right. Ignore air resistance. Does the horizon
1. A rock is thrown up and to the right. Ignore air resistance. Does the horizontal component of momentum stay constant during the rock’s flight? Does the vertical component stay …
1. A rollercoaster cart with a mass of 18 kg is travelling around a vertical loo
1. A rollercoaster cart with a mass of 18 kg is travelling around a vertical loop (circle) with a radius of 9 meters. At the top, it's traveling at the minimum speed needed so tha…
1. A roulette wheel has 38 slots, 2 of which are green, 18 are red, and 18 are b
1. A roulette wheel has 38 slots, 2 of which are green, 18 are red, and 18 are black. A successful bet on black or red doubles the money, whereas one on green fetches 30 times as …
1. A salesperson makes four calls per day. A sample of 100 days gives the follow
1. A salesperson makes four calls per day. A sample of 100 days gives the following frequencies of sales volumes. Number of Sales Observed Frequency (Days) 0 30 1 40 2 20 3 8…
1. A salesperson makes four calls per day. A sample of 100 days gives the follow
1. A salesperson makes four calls per day. A sample of 100 days gives the following frequencies of sales volumes. Number of Sales Observed Frequency (Days) 0 30 1 40 2 20 3 8…
1. A sample of 20 glass bottles of a particular type was selected, and the inter
1. A sample of 20 glass bottles of a particular type was selected, and the internal pressure strength of each bottle was determined. Consider the following partial sample informat…
1. A sample of 20 glass bottles of a particular type was selected, and the inter
1. A sample of 20 glass bottles of a particular type was selected, and the internal pressure strength of each bottle was determined. Consider the following partial sample informat…
1. A sample of 25 adults living in Kentucky had an average IQ of 102. The margin
1. A sample of 25 adults living in Kentucky had an average IQ of 102. The margin of error for a 95% confidence interval is 18. We are interested in a 99% confidence interval for t…
1. A sample of 25 adults living in Kentucky had an average IQ of 102. The margin
1. A sample of 25 adults living in Kentucky had an average IQ of 102. The margin of error for a 95% confidence interval is 18. We are interested in a 99% confidence interval for t…
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Mathematics problem solving
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