ssume that the national divorce rate is 30% (meaning that 30% of marriages end in divorce).  In which community is the difference from this national rate statistically significant?

Q: 4. If the sale of ice cream and pizza are independent, then as ice cream sales decrease by 60…

A: Given that  The sale of ice cream and Pizza are independent . The ice cream sales decrease by 60%…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: For country C n=1024,p hat =0.45 For country D n =1078 ,p hat = 0.41

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Two sample z test for proportions: Two sample z test for proportions is the hypothesis test to test…

Q: n the table above, who had the highest average expenditure? who had the owest - eexpondituac?

A: Here  Expidenture of 4 different person is shown The last column shows the Avg Expedinture

Q: 1. Is the average suicide rate in January greater than or less than 1 in 100,000? 2. Are males or…

A: 1. From the graph it can be seen that in the              month of January suicide rate is below 1…

Q: Consider the following figures showing the situation of the Australian labour market in 2018…

A: *Answer:

Q: (a) What percentage of books last longer than 10 years? (b) What percentage of books last less than…

A: Given: The lifespan of all high school text book is approximately normal with μ=9 yearsσ=2.5 years

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Given Information: Country A: Sample size n1=1004 Sample proportion p^1=0.53 Country B: Sample size…

Q: Suppose that in 2008, 628,250 citizens died of a certain disease. Assuming the population of the…

A:

Q: eart attack or stroke within one year, and of the ticagrelor patients, 565 suffered a heart attack…

A:

Q: In a community with a population of 5,000 people where 60% were male, 200 vehicular accidents were…

A: Sex ratio is simply the ratio of the number of males and the number of females in a population. For…

Q: 1) what proportion of students scored above student 33 on homework 3? 2) what proportion of students…

A: Given:   Student ID HW 1 HW 2 HW 3 1 98 93 99 2 81 80 64 3 66 91 75.5 4 84 94 80 5 65…

Q: In a sample of 45 men, 27 said that they had less leisure time today than they had 10 years ago. In…

A:

Q: From some financial statistics, it is found that the monthly average electricial charges was 2,460…

A: It is given that the for monthly average electric charges, mean was 2460 and S.D. RS120 while for…

Q: Given that Germany has a death rate of 11.6 per 1000 and a population of 80,722,792, about how many…

A: The Germany has a death rate of 11.6 per 1000. That is 11.6%, and a population of 80,722,792.

Q: Complete the following source table: Source SS df MS F Between   2     Within     7.52   Total…

A: The total degrees of freedom is 8 and the between degrees of freedom is 2.

Q: d) What proportion of people leave Vegas having lost between $200 and $800 (for a given year)?

A: (d) Obtain the Z-score for the random variable X equals 200. The Z-score for the random variable X…

Q: Suppose in a single month a certain baseball team won 3 games and lost 21 what percentage of the…

A:

Q: In a study, the rate of success of initial vaccination among 330 subjects receiving the 1:10…

A: Given: Sample size of subjects (n) = 330 Sample proportion or success rate p^=0.971 Hypothesized…

Q: In a sample of 47 men, 36 said that they had less leisure time today than they had 10 years ago. In…

A: We have to perform test for difference in two proportion.

Q: a nutritionist wishes to determine, within 3% the true proportion of adults who do not eat lunch. if…

A:

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: According to the provided data, a total of 3000 households were contacted to participate in the…

Q: Assume that 30% of city employees in Carson City ride the bus to work. Answer the following…

A:

Q: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

A: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

Q: Calculate the incidence rate of Lupus in men older than 45 years old per 1000 population? Calculate…

A: Using the given table we have to Calculate the incidence rate of Lupus in men older than 45 years…

Q: Based on the information, what is the cumulative relative frequency for the 50.2% - 59.7% change in…

A: It is given that Cumulative frequency for class 50.2-59.7 is = 45 Total frequency = 50

Q: In a class in which the final course grade depends entirely on the average of four equally weighted…

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Q: A biology class performs an experiment com- paring the quantity of food consumed by a certain kind…

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Q: Con side that the ten Percent of indlividuals getting tested for the Virus, have the Virus. Now…

A: Let A be the event denoteds the person having virus and B be the event denote the event the person…

Q: What percent of our campus is female? The Statistical Abstract of the United States, 112th edition,…

A:

Q: In a survey at a local university 52% of students say that they less than the recommended eight…

A: The problem concerns working out the percentages and interpreting .

Q: 13. The araler takt Is $7950IO on a stene015Ound SyrtemipuK chase of 7645. Find the sales tar rate..

A: To find the sales tax rate

Q: If Amy spends the whole day swimming every Friday, and only Friday, what percentage of her days in a…

A: Amy spends day of friday to swim.  1friday occurs within a weak.  Since 15 Fridays Will come in 15…

Q: USE THE FOLLOWING INFORMATION TO ANSWER THE NEXT TWÓ QUESTIONS. At a particular university, 60 % of…

A:

Q: In a series of houses actually invaded by smallpox, 70% of the inhabitants are attacked and 85% have…

A: Suppose A & B be two events. Then we know, (A∪B)=(A)+(B)-(A∩B). Consider from the problem that,…

Q: mean: 67.755 standard deviation: 26.871

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: As shown in the table, the average number of siblings (sibs) for 1018 middle class adults is 3.15.…

A: Introduction: It is required to determine if the middle class of the country come from smaller…

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: The number of households not willing to participate in the survey is 1200.

Q: or a population with μ  = 80 and σ = 10,the z-score corresponding to X = 85 would be?

A: The z-score tells  number of standard deviation a value is above or below from the mean. If the…

Q: A survey found that in a sample of 100 families, 37 owned cats. A survey done 5 years ago found that…

A:

Q: a. How many of the 125 people had resting pulse rates of more than 100? b. What percentage of people…

A: a. There are totally 125 people who had resting pulse rates. Count the number of dots that are above…

Q: lomly selected a group rmation. Table 1 provie stions. ondent # How much a risk would do you thin…

A:

Q: Assuming a group has one uniform rate, 40% of the group receives a 10% rate increase and 60% of the…

A: We will consider that the group has total 100 members and each member of the group has a uniform…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: It has been reported that the average credit card debt for college seniors at the college book store…

A: Given: Sample size, n = 50 Sample mean,   Standard deviation,

Q: A recent survey found that in a particular city of all poor children born in 1980, 11,500 enrolled…

A: Scaling of data:The scaling of data, or in other words, normalization of data is a mathematical…

Q: A bicycle manufacturer observes that the number of bike paths in a city affects the number of…

A: here take  x= no. of bike paths y= no. of bicycle sold here compute the regression line and then for…

Q: C1. A computer spam filter is 98% effective at sending spam emails to my junk folder, but will also…

A: Solution

Q: D. 60 percent of all children spend at least how many hours per day unsupervised? hours.

A: Given that  X ~ N ( μ =  3 , σ = 1.5 ) μ = 3  , σ= 1.5 Formula for Z-score Z = ( X - μ ) / σ