In a random sample of 120 cheerleaders, 54 had suf-fered moderate to severe damage to their voices. With 90% confidence, what can we say about the maximumerror if we use the sample proportion 54 120 = 0.45 as anestimate of the true proportion of cheerleaders who areafflicted in this way?

Q: The business college computing center wants to determine the proportion of business students who…

A: Given,n=200x=65p^=xnp^=65200=0.325α=0.01H0:P=0.25H1:P>0.25

Q: How many students should be sampled in order to be 90% confident in estimating the proportion in…

A: Given that  Margin of error =E =0.10 90% confidence.

Q: In 1000 rolls of two dice, six was rolled 200 times for die A and 150 times for die B. Is there a…

A: x:  proportion of sixes obtained for die A y:  proportion of sixes obtained for die B n1=n2=1000…

Q: What sample size is needed if a researcher needed to calculate the true proportion of individuals…

A: HERE , MOE  = 0.01 confidence level = 95% here z-critical for 95% confidence level = 1.96 here use…

Q: What sample size should be obtained if he wants to be within 4 percentage points with 95​%…

A: Given that the margin of error is 4 percentage points. That is, ME=4%=0.04 Confidence level =95% The…

Q: Past studies have indicated that the percentage of smokers was estimated to be about 33%. Given the…

A: Answer: From the given data, Population proportion (P) = 33% = 0.33 Sample size (n) = 1875 x = 436…

Q: A study found that 77% of students report that their peers at least "sometimes" copy information…

A: Margin of error: Margin of error is a range of values that lie above and below the sample statistic…

Q: hean amount paid by his firm for person- njury resulting from personal accidents 18,500. An actuary…

A: Given Xbar=19415 σ=2600 Level of significance=0.05 µ=18500

Q: State the statistical hypotheses (null and alternative) for a two-tailed test against a known…

A: In this context, the known population mean is 90.

Q: a study was conducted to determine the proportion of people who dream in black and white instead of…

A: The objective of this question is to test the claim that the proportion of people over 55 who dream…

Q: The likelihood that a light bulb is defective is 5%, on a particular production line. Twelve light…

A: Answer: Using the given data, Let X denotes the number of defective light bulbs The probability of a…

Q: In a survey, 43% of the respondents stated that they talk to their pets on the telephone. A…

A: The question is about hypothesis testing.Given :Population proportion of respondents who talk to…

Q: What is true about the sampling distribution of the mean retings reported to you by the market firms

A:

Q: Two balanced coins are flipped. What is the variance of the number of heads observed?

A: For this case, the number of possible outcomes will be:  (HH), (HT), (TT), (TH) Here, H represents…

Q: A survey of 50 girls in canada who played soccer in the summer found that 35 of them also played…

A: sample size(n)=50No.of girls played volleyball in the winter(x)=35

Q: It is believed that 10% of the children enrolled in the elementary schools are left-handed. Suppose…

A:

Q: The business college computing center wants to determine the proportion of business students who…

A: Given,n=300x=125p^=xnp^=125300=0.41667α=0.01

Q: A simple random sample of 400 individuals provides 100 Yes response.  What is the estimate of the…

A: We know that,  If P is population proportion and  p^ is sample proportion then standard error of…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: From the provided information, Sample size (n) = 54 Out of which 35 involved an intoxicated driver.…

Q: The national rate of breast cancer among women aged 50-54 is 221 per 100,000. #Based on data from a…

A: This code requires to calculate the sample size for effect sizes of 275, 300, 350, and 400 per…

Q: How large a sample is necessary to estimate the true proportion of unmarried Canadians aged 25-29…

A: Given data: Margin of error  = 5% = 0.05 Confidence level  = 0.90 To find: Sample size (n) = ?

Q: a study was conducted to determine the proportion of people who dream in black and white instead of…

A: The objective of this question is to conduct a hypothesis test to determine if the proportion of…

Q: cording to a survey, the average American person is in a car for 5 hours per week. To test if the…

A:

Q: In 2010, the proportion of Texans without health insurance was 0.11. To update this information a…

A:

Q: he role of chance does require that we consider the significance of differences

A: A statistically significant difference is a result that is unlikely to occur by chance alone

Q: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…

A:

Q: A newspaper reported the results of a political poll about which candidate likely voters preferred,…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: The margin…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: Denote p1, p2 as the proportions of all people who dream in black and white instead of color under…

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: A tv sports commenter wants to estimat th proportion of citizens who "follow professional football."…

A:

Q: What are the null and alternative hypotheses? Họ: | versus H,: (Type integers or decimals. Do not…

A: Given : Proportion of respondents who stated they talk to their pets on phone = 0.45 Sample size =…

Q: How large a sample is needed to estimate the true proportion of these children getting adequate…

A: It is given that Proportion p = 0.45 Margin of error E = 0.025 Level of confidence = 0.99 The…

Q: earcher wants to determine the proportion of elm trees in Windsor, Ontario, dying of Dutch elm…

A:

Q: If 25% of boys born weigh over 20 lbs and a sample of 150 was taken what are the odds that 35 or…

A:

Q: Women who are obese suffer social and economic consequences, a new study has shown. They are 20%…

A: We are given one scenario: Women who are obese suffer social and economic consequences, a new study…

Q: n a random sample of 400 electrical components, 88 are found to be defective. You wish to test the…

A:

Q: A racing car consumes a mean of 103 gallons of gas per race with a variance of 36. If 38 racing…

A: The probability of the sample mean would be greater than 101.5 gallons is 0.9382 and it is obtained…

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

A:

Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: Given,n=240x=104p^ =xn p^ =104240 p^ =0.4333H0 :P=0.45H1 : P<0.45α=0.01

Q: In a survey, 33% of the respondents stated that they talk to their pets on the telephone. A…

A: The given data is as follows:Sample size (n) =210Number of owners who spoke to the pet on phone…

Q: A simple random sample of 300 men included 71 who smoke, and a simple random sample of 310 women…

A: Given: Sample sizes: Sample of men n1=300 Sample of women n2=310 Number of men who smoke X1=71…

Q: Find the 90th percentile.

A: It is very useful in statistics . It is highly used nowadays .

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.