Find the mean for the data. The data represents the costs of nine compact refrigerators rated very good or excellent by Consumer Reports on their website.

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asked 2020-11-23

The accompanying two-way table was constructed using data in the article “Television Viewing and Physical Fitness in Adults” (Research Quarterly for Exercise and Sport, 1990: 315–320). The author hoped to determine whether time spent watching television is associated with cardiovascular fitness. Subjects were asked about their television-viewing habits and were classified as physically fit if they scored in the excellent or very good category on a step test. We include MINITAB output from a chi-squared analysis. The four TV groups corresponded to different amounts of time per day spent watching TV (0, 1–2, 3–4, or 5 or more hours). The 168 individuals represented in the first column were those judged physically fit. Expected counts appear below observed counts, and MINITAB displays the contribution to $\displaystyle{x}^{{{2}}}$ from each cell.
State and test the appropriate hypotheses using $\displaystyle\alpha={0.05}$
$\displaystyle{b}{e}{g}\in{\left\lbrace{a}{r}{r}{a}{y}\right\rbrace}{\left\lbrace{\left|{c}\right|}{c}{\mid}\right\rbrace}{h}{l}\in{e}&{a}\mp,\ {1}&{a}\mp,\ {2}&{a}\mp,\ {T}{o}{t}{a}{l}\backslash{h}{l}\in{e}{1}&{a}\mp,\ {35}&{a}\mp,\ {147}&{a}\mp,\ {182}\backslash{h}{l}\in{e}&{a}\mp,\ {25.48}&{a}\mp,\ {156.52}&{a}\mp,\backslash{h}{l}\in{e}{2}&{a}\mp,\ {101}&{a}\mp,\ {629}&{a}\mp,\ {730}\backslash{h}{l}\in{e}&{a}\mp,\ {102.20}&{a}\mp,\ {627.80}&{a}\mp,\backslash{h}{l}\in{e}{3}&{a}\mp,\ {28}&{a}\mp,\ {222}&{a}\mp,\ {250}\backslash{h}{l}\in{e}&{a}\mp,\ {35.00}&{a}\mp,\ {215.00}&{a}\mp,\backslash{h}{l}\in{e}{4}&{a}\mp,\ {4}&{a}\mp,\ {34}&{a}\mp,\ {38}\backslash{h}{l}\in{e}&{a}\mp,\ {5.32}&{a}\mp,\ {32.68}&{a}\mp,\backslash{h}{l}\in{e}{T}{o}{t}{a}{l}&{a}\mp,\ {168}&{a}\mp,\ {1032}&{a}\mp,\ {1200}\backslash{h}{l}\in{e}$
$\displaystyle{C}{h}{i}{s}{q}={a}\mp,\ {3.557}\ +\ {0.579}\ +\ {a}\mp,\ {0.014}\ +\ {0.002}\ +\ {a}\mp,\ {1.400}\ +\ {0.228}\ +\ {a}\mp,\ {0.328}\ +\ {0.053}={6.161}$
$\displaystyle{d}{f}={3}$

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asked 2020-10-31

A Bloomberg Businessweek North American subscriber study collected data from a sample of 2861 subscribers. Fifty-nine percent of the respondents indicated an annual income of $\$75,000$ or more, and 50% reported having an American Express credit card.
a. What is the population of interest in this study?
b. Is annual income a categorical or quantitative variable?
c. Is ownership of an American Express card a categorical or quantitative variable?

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asked 2021-01-31

Describe the spread in running times based on quartiles.
The data represents the average drive (in yards) for 186 professional golfers on the men’s PGA tour in 2011. The first quartile is 285.2 yards and third quartile is 297.5 yards.

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asked 2021-02-09

Gender is on variable of interest in a study of the effectiveness of a new medication.For data entry purposes, the researcher conducting the study assigns 1 for Male and 2 for Female. Is the gender data quantitative or qualtitative?

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asked 2021-02-19

You deposit money into a saving account that earns interest. The balance Bo f the account after t years is given by $\displaystyle{B}={1200}\cdot{1.05}^{{t}}{d}{o}{l}{l}{a}{r}{s}.$
a. Make a table that shows the account balance for years 0 through 10.
b. You want to buy a home entertainment center that costs $1500. How long will you need to wait to have enough money in your savings account? Report your answer to the nearest whole year.

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asked 2021-02-06

You may need to use the appropriate appendix table or technology to answer this question.
Money reports that the average annual cost of the first year of owning and caring for a large dog in 2017 is $1,448. The Irish Red and White Setter Association of America has requested a study to estimate the annual first-year cost for owners of this breed. A sample of 50 will be used. Based on past studies, the population standard deviation is assumed known with $\displaystyle\sigma=\${230}.$
$\begin{matrix} 1,902 & 2,042 & 1,936 & 1,817 & 1,504 & 1,572 & 1,532 & 1,907 & 1,882 & 2,153 \\ 1,945 & 1,335 & 2,006 & 1,516 & 1,839 & 1,739 & 1,456 & 1,958 & 1,934 & 2,094 \\ 1,739 & 1,434 & 1,667 & 1,679 & 1,736 & 1,670 & 1,770 & 2,052 & 1,379 & 1,939\\ 1,854 & 1,913 & 2,163 & 1,737 & 1,888 & 1,737 & 2,230 & 2,131 & 1,813 & 2,118\\ 1,978 & 2,166 & 1,482 & 1,700 & 1,679 & 2,060 & 1,683 & 1,850 & 2,232 & 2,294 \end{matrix}$
(a)
What is the margin of error for a $95\%$ confidence interval of the mean cost in dollars of the first year of owning and caring for this breed? (Round your answer to nearest cent.)
(b)
The DATAfile Setters contains data collected from fifty owners of Irish Setters on the cost of the first year of owning and caring for their dogs. Use this data set to compute the sample mean. Using this sample, what is the $95\%$ confidence interval for the mean cost in dollars of the first year of owning and caring for an Irish Red and White Setter? (Round your answers to nearest cent.)
$_______ to $________

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asked 2020-11-01

True or false: The mean, median, and mode can all be used with quantitative data. Explain your answer

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asked 2021-02-10

Find the mean and median wage.
A supervisor at $\$1,200$ a week, an inventory manager at $\$700$ a week, six stock boys at $\$400$ a week and four drivers at $\$500$ are employed by a small warehouse.
Mean:
The sum of all the entries divided by the total number of entries is known mean.

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asked 2020-10-20

Explain whether there are any outliers in these data or not.
The 5-number summary for the run times in minutes of the 150 highest grossing movies of 2010 is provided.

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asked 2020-10-27

The number of boots that 25 students had in their homes in Florida were recorded below:
0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 5, 8
Create a dot plot of the data above.

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Answer 1

Calculation:
The sum of all the entries divided by the total number of entries is known mean.
The formula for mean is,
$\overline{x}=\frac{\sum x}{n}$
Substitute the values and nas 9 in the formula,
$\overline{x}=\frac{150+150+160+180+150+140+120+130+120}{9}$
$=\frac{1300}{9} = 144.444$
Thus, the mean cost of compact refrigerators is $\$144.44$,

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Find the mean for the data. The data represents the costs of nine compact refrigerators rated very good or excellent by Consumer Reports on their website.

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