a. With 95% confidence the population mean number of texts per day is between and texts. b. If many groups of 134 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population number of texts per day and about percent will not contain th true population mean number of texts per day.

Q: 2. Suppose that you take a random sample of 360 people who voted in the last election in a heavily…

A:

Q: 47. Out of 400 people sampled, 372 had kids. Based on this, construct a 99% confidence interval for…

A:

Q: The following sample data are from a normal population: 10, 8, 12, 15, 13, 11, 6, 5. What is the…

A: Given data is10,8,12,15,13,11,6,5sample size(n)=8sample mean(x¯)=10standard…

Q: Gasoline Use A random sample of 36 drivers used on average 749 gallons of gasoline per year. If the…

A:

Q: 4. A study found that the average time it took a person to find a new job was 5.9 months. If a…

A: From the provided information, Sample size (n) = 36 Population standard deviation (σ) = 0.8 Mean…

Q: Increasing the sample mean would cause a confidence interval to (a) shift left (b) shift right (c)…

A:

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: ind a 95% confidence interval for the difference between the two proportions.   b) Is there a…

A: Let p1 and p2 be the two population proportions of people who said that it is serious.Given…

Q: confidence interval for the mean of five measurements is smaller than for a single result.

A: Here we use confidence interval formula for explanations as given in step 2

Q: In a random sample of 500 adults, 410 described themselves as vegetarians. Construct a 95%…

A: We have been provided with the following information about the adults who describe themselves as…

Q: Find a 95% confidence interval for the proportion of renters.

A: It is given that  Favourable cases, X = 360 Sample size, n = 600 Confidence interval = 95%

Q: Suppose we take a SRS of high school seniors and get a 95% confidence interval that 250 to 278…

A:

Q: What are the confidence intervals for: Mean= 1020 Sd= 30 N=300 α= .01

A: We have given that  Mean= 1020 Sd= 30 N=300 α= .01

Q: A recent study showed that among 725 randomly selected subjects who completed 4 years of college,…

A: We have given that,  Favorable cases (X) = 139 and Sample size    (n) = 725 Then,  We will find 95%…

Q: Construct a confidence interval for GDP in Sweden from 1990-2021.

A: Gross Domestic Product of the data from 1990-2021 1990 240 1991 241 1992 243 1993 210…

Q: If the number of smokers in a sample of 40 students selected from university A is 12 and the number…

A:

Q: 9. A survey found that out of 900 workers, 150 said they were interrupted by frank phone calls. Find…

A:

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A:

Q: A doctor would like to estimate the mean difference in the number of hours of sleep for seniors in…

A: Random sample of 50 high school seniors  Random sample of 50 seniors from the colleges in his county…

Q: Sam computed a 90% confidence interval for mean from a specific random sample size n. He claims that…

A: Given Information: Sam computed a 90% confidence interval for mean from a specific random sample of…

Q: . The mean and standard deviation of the scores of a random sample of 45 Grade 10 students who took…

A: Given n=45 , x=76 , s=12.5

Q: n 2005, Health Canada claimed that 16.3% of Canadian adults are obese. A researcher wanted to check…

A: Given,   The sample proportion is,

Q: 4. A sociologist discovered that an average of 7.2 jobs was held by 50 retired men during the course…

A: Sample mean x̄=7.2,n=sample size=50, population standard deviations σ=2.1  Construct 95% CI for…

Q: If the number of smokers in a sample of 160 students selected from university A is 56 and the number…

A: From the provided information,

Q: 24. The CDC took a random sample of 530 people that lived near high-voltage towers. Of these people,…

A:

Q: A second-semester junior at a large high school wants to estimate the number of colleges a senior…

A: It is been asked to find the 99% confidence interval to estimate the true mean number of colleges…

Q: Report the​ 95% confidence interval for the percentage of all young people who earned a high school…

A: From the given information, p-hat value is 0.86 and the sample size n is 1200.

Q: Of 130 adults selected randomly from one town, 30 of them smoke. Construct a 90% confidence interval…

A:

Q: In a survey conducted by the Gallup Organization, 1100 adult Americans were asked how many hours…

A: Sample size n=1100The 95% confidence interval is.(42.7,44.5)

Q: A company surveyed its employees to determine what the new daily meal allotment dollar amount should…

A: would give the supervisor a better idea of what the true mean is compared to simply taking the mean…

Q: 5. In a pre-election poll, a pollster finds that 552 out of 1025 people polled favor Smith.…

A: Given data: N = 1025 X = 552 Confidence level  = 95 %

Q: 10. Use the given confidence interval to find the margin of error and the sample mean. (15.0,22.4)…

A: Followings are the answer of the question Use the Confidence interval for the mean Margin of…

Q: Suppose that in a sample of 5274 customers at a food store, 2468 food shop more than once a week.…

A: From the provided information, Sample size of customers (n) = 5274 Out of which 2468 food shop more…

Q: if n = 42, p = 0.6 then construct the 98% confidence interval for the population proportion.

A:

Q: If n=470 and p̂ (p-hat) = 0.65, construct a 95% confidence interval.

A: From the provided information, Sample size (n) = 470  p̂ (p-hat) = 0.65 Confidence level = 95%

Q: the number of smokers in a sample of 40 students selected from university A is 14 and the number of…

A: Given data,For University An1=40x1=14p1=1440=0.35For University Bx2=84n2=380p2=84380=0.22Construct…

Q: . The best point estimator for the average weight of current PBA players is __ kilograms 2. At 98%…

A: The provided information is 1. The point estimate is 88.1667   Σx=2645Σx2=239183n=30The mean…

Q: 17. Confidence interval is for population parameter and prediction interval is for a variable .…

A: Answer in the next step.

Q: For what type of variable does it make sense to construct a confidence interval about a population​…

A: Qualitative variable: A variable which cannot be measured in numerically is known as a Qualitative…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.