Construct a 95% confidence interval *** not 90% pleaseOnce built the 95%, explain what it means in a full sentence thepast 50 years (Twenge, 2000). In the 1950s, theaverage score on the Child Manifest Anxiety Scalewas u = 15.1. A sample of nproduces a mean score ofM = 23.3 with SS = 240.a. Based on the sample, has there been a significantchange in the average level of anxiety since the1950s? Use a two-tailed test with a = .01.16 of today's children%3Db. Make a 90% confidence interval estimate of to-day's population mean level of anxiety.c. Write a sentence that demonstrates how theoutcome of the hypothesis test and the confidenceinterval would appear in a research report.

Name: Construct a 95% confidence interval *** not 90% pleaseOnce built the 9
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Description: Construct a 95% confidence interval *** not 90% pleaseOnce built the 95%, explain what it means in a full sentence thepast 50 years (Twenge, 2000). In the 1950s, theaverage score on the Child Manifest Anxiety Scalewas u = 15.1. A sample of nproduces

(a) State the hypotheses. That is, there is no evidence that there has been a significant change in…

Answered: the past 50 years (Twenge, 2000). In…

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Construct a 95% confidence interval *** not 90% please

Once built the 95%, explain what it means in a full sentence

the
past 50 years (Twenge, 2000). In the 1950s, the
average score on the Child Manifest Anxiety Scale
was u = 15.1. A sample of n
produces a mean score ofM = 23.3 with SS = 240.
a. Based on the sample, has there been a significant
change in the average level of anxiety since the
1950s? Use a two-tailed test with a = .01.
16 of today's children
%3D
b. Make a 90% confidence interval estimate of to-
day's population mean level of anxiety.
c. Write a sentence that demonstrates how the
outcome of the hypothesis test and the confidence
interval would appear in a research report.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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