5. Nancy surveyed 35 randomly selected students in her school about the number of hours they spend watching videos online each day. She added their responses and divided the sum by 35 to arrive at a value of 1.2. Which term best describes the quotient Nancy computed? A. sample mean B. confidence interval C. population mean D. margin of error

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A: (a) Computation of critical value: 1-α=0.90α=0.10α2=0.051-α2=0.95 The critical value of…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: (a) The proportions are 22.2% for males and 18.7% for females, The margin of error is 3%, and…

Q: 2. Given: n=80, a = 15, level of confidence is 92%. What is the margin of error of the given data?

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given :  E = 3% = 0.03 p1 = 0.214 p2 = 0.187 Z = 2.576 at 99% confidence

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A: Margin of Error(E)=0.05For 99% confidence level Zα2=2.576 Formula; E=Zα2×(p×(1-p)n)

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A: Answer: As sample increases  the p-value decreases.

Q: 6. A researcher wishes to estimate the percentage of adults who support abolishing the penny. What…

A: a) Given, Margin error (E) = 0.03 Sample proportion = 0.34   The objective is to find the sample.…

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A: Given Information: Margin of error = 0.01 Confidence level = 95% p^=0.2 To find sample size n:…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: A physical therapist wants to determine the difference in the proportion of men a women who…

A:

Q: Construct a 99% confidence interval estimate for the population mean, N = 36, ?̅= 135, σ = 24

A: As the population standard deviation σ is not known, we will use z-distribution.  The value of z at…

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A: a) Consider that p is the true population proportion of restaurants, which have food safety…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given: A physical therapist wants to determine the difference in the proportion of men and women who…

Q: B. Find the margin error that corresponds to the given statistics and confidence level. n = 150, p =…

A:

Q: 3. A political scientist would like to estimate the proportion of voters who read their ballot…

A: To calculate: How large of a sample size does she need?

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A: (a) From the partial table of critical values, the critical value corresponding to 90% is 1.645. The…

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A:

Q: (d) How many subjects are needed to estimate the mean number of books read the previous year within…

A: (d) The mean number if books read the previous year within four books, and standard deviation is13.3…

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Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Solution: Given information: p1^=0.219 Sample proportion of male p2^=0.197 Sample proportion of…

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A: Solution: a. From the given information, confidence level is 0.96, p=0.48 and E=0.03.

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A: confidence interval calculation

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given Margin of error=0.04 (a) she uses the estimates of 21.8​% male and 18.1​% female from a…

Q: Use z =2.576 If the margin of error for the population mean for 99% Confidence Level is 39, what…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: Suppose the U.S. president wants to estimate the proportion of the population that supports his…

A: Critical value: The value of α is 0.05 for 95% confidence level. Using excel formula…

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A: Given data: Confidence level = 90% To find: Required sample size

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Q: . The Division of Traffic and Parking at a large university wants to know the percentage of tudents…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: 2. The principal of a high school wants to know how long his students spend doing homework at night…

A: Since you have posted a question with multiple subparts we will solve first three subparts for you.…

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Q: 3. A Gallup poll conducted in 2010 found that 494 of 1050 adult Americans believe it is the…

A: Given that  Sample size n =1050 Favorable cases x =494 Sample proportion p^=x/n  =494/1050 =0.4705

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: a) Compute the required sample size using the formula: E=zα2 p⏞11-p⏞1n+p⏞21-p⏞2n   Where 'E' is the…

Q: 6) Find the t, value from Table for the indicated confidence level and sample size. 95% confidence…

A: a) 95% confidence level and n = 35 Degree of freedom = 35 – 1 = 34 Significance level(α) = 1-0.95 =…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given Information: Confidence level = 90% = 0.90 Margin of Error E=5%=0.05 Sample proportion of…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: Given a population of 5000 scores with mean µ = 86 and o=

A:

Q: (d) How many subjects are needed to estimate the mean number of books read the previous year within…

A: (d)

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: To estimate the male proportion P1 = 0.223 and female proportion P2 = 0.198 Margin of Error E = 0.02…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Percentage of level of confidence is 95%. Here, margin of error is, E=0.03.

Q: how many subjects are needed to estimate the mean number of books read the previous year with six…

A: It is given that confidence level is 0.90, standard deviation is 11.3 and margin of error E is 6.

Q: 12) Find the sample size need to find the Population Proportion if the margin of error is 5%, the…

A:

Q: (c) If the confidence levels were 98% rather than 80%, would the margin of error be larger or…

A: The confidence levels are 98% and 80%.

Q: (b) Baseo on your sample, graph the 95% confidence interval for the population mean of all the…

A: Given :  Point Estimate ,  Xˉ\bar X = 4.8134.813  Sample Standard Deviation (s)(s) = 2.3062.306…

Q: The US Department of Energy reported that 49% of homes were heated by natural gas. A random sample…

A:

Q: 46. A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes…

A: Given, Total discs n = 1067 No of non defective = 993 No of defective = 1067 - 993 = 74

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: If n=15, (x-bar)=38, and s=8, find the margin of error at a 99% confidence level

A: Margin of error: E=tα2×SE Degrees of freedom: 14(=15-1). Using Excel function, “=T.INV.2T…

Angles in Circles

Angles within a circle are feasible to create with the help of different properties of the circle such as radii, tangents, and chords. The radius is the distance from the center of the circle to the circumference of the circle. A tangent is a line made perpendicular to the radius through its endpoint placed on the circle as well as the line drawn at right angles to a tangent across the point of contact when the circle passes through the center of the circle. The chord is a line segment with its endpoints on the circle. A secant line or secant is the infinite extension of the chord.

Arcs in Circles

A circular arc is the arc of a circle formed by two distinct points. It is a section or segment of the circumference of a circle. A straight line passing through the center connecting the two distinct ends of the arc is termed a semi-circular arc.