A sample of 124 kissing couples were observed, with 44 of them leaning their heads to the left. Use these sample data to test whether or not the population proportion of kissing couples who lean their heads to the left differs from 1/3. What is the z and p-value?

Q: A sample of n=4 scores has SS=60. what is the variance for this sample?

A:

Q: Find the corresponding z-score for a sample of n = 4  and M = 38 taken from a population with a mean…

A: Given,Sample size (n)=4Sample mean (M)=38Population mean(μ) =40Standard deviation (σ)=8

Q: Suppose that 35%  of all adults in a population would say “good”  and 65% would say “bad”  if they…

A: As per the question35% population say good65% population say badMean of the ample proportion who say…

Q: The following data represent the age distribution of a sample of 70 women having multiple-delivery…

A: Given: Sample size, n=70 Age Number 15-19 1 20-24 5 25-29 16 30-34 28 35-39 17 40-44…

Q: A sample of n = 20 scores has a M = 20 and a variance of 9. What is the standard deviation?

A:

Q: A repeated-measures, a matched-subjects, and an independent-measures study all produce a t statistic…

A: From the provided information, A repeated-measures, a matched-subjects, and an independent-measures…

Q: Compute the χ2χ2 test statistic.

A:

Q: the assumption that the t test for independent samples makes regarding the amount of variability in…

A: Independent Two Samples t-test:Suppose there are two populations independent of one another. A…

Q: A sample of 12 scores has a variance of s2 = 48. What is the estimated standard error for the sample…

A:

Q: If X is a normal variate with mean 5 and variance 4. Find P ( -1.5 < X < 2)?

A: Given,mean(μ)=5standard deviation(σ)=2

Q: A physician employed by a large corporation believes that due to an increase in sedentary life in…

A:

Q: A sample of n = 9 scores has SS = 200. What is the variance for this sample?

A:

Q: A sample of n = 26 scores has SS = 125. What is the variance for this sample ?

A: According to the given information, we have SS = 125 n = 26

Q: The table to the right shows the cost per ounce (in dollars) for a random sample of toothpastes…

A: Note: According to our guidelines we can answer only first three subparts   The table to the right…

Q: For a sample with s = 12, a score of X = 73 corresponds to z = 1.00. What is the sample mean?

A: According to the provided information, s=12 X=73 z=1

Q: A sample of n=25 scores has a mean of 68. Find the z-score for this sample. If it was obtained from…

A:

Q: A sample of 4 scores has a variance of s2 = 64. What is the estimated standard error for the sample…

A: Standard Error:  Standard error gives the accuracy of a sample mean by measuring the…

Q: A population with u = 85 and o = 12 is transformed into z-scores. After the transformation, what is…

A: When the raw scores are transformed to z-scores the mean will be always equal to 0 and the standard…

Q: A sample of n = 5 scores has Σ X = 20 and Σ X2 = 180. For this sample, what is the value of the…

A:

Q: A researcher conducts an independent-measures study comparing two treatments and reports the t…

A: Solution: Given information: Test statistic t(25) = 2.071 α=0.05  Level of significance

Q: For a sample of n = 11 scores with SS = 440. What is the sample variance and the estimated standard…

A: Sample  Variance s2 = SS/n-1 Estimated standard error sM = s/sqrt(n).

Q: A sample of n = 16 scores has a mean of M = 40 and a variance of s2 = 128.  What is the estimated…

A: It is given that the variance is 128 and the sample size is 16.

Q: For a population with μ = 80 and σ = 6,what is the z-score corresponding to X = 68?

A:

Q: If x, xy ... x be a random sample drawn from a normal population with mean u and variance o?, then…

A:

Q: For a two-sided test of hypothesis of a single parameter with population variance known, for a given…

A: Given,test statistic(Z)=1.8α=0.05Zα2 =1.96And the given test is two tailed test.

Q: In a test of Ho: H= 100 against H:u 100, a sample of size 10 produces a sample mean of 103 and a…

A: given H0 : μ = 100 H1 : μ ≠100 alpha = 5% p value = 0.08

Q: The table to the right shows the cost per ounce (in dollars) for a random sample of toothpastes…

A: ( b ) d.f N is = ? d.f D is = ? The  critical value = ? The rejection region is ?

Q: Q2 A new battery supposedly with a charge of 1.5 volts actually has a voltage with a uniform…

A: Given,      A new battery supposedly with a charge of 1.5 volts      actually has a voltage…

Q: If a researcher reports a t-statistic with df = 18, how many individual subjects participated in the…

A: Given: Df = 18

Q: 3. For a normal population with a mean of 20 and a variance IU, None of the other 0.25 0.50 0.35

A: Answer: 3- Given a normal population with mean μ  = 20  and variance σ2  = 10                   Find…

Q: • The paper referenced in the previous exercise gave the accompanying data on the at which smoking…

A: p1,p2,p3 and p4 denote the true proportion of men who smoked low-tar cigarette under different age…

Q: In the population, the average IQ is 100 with a population standard deviation (o) of 15. A team of…

A: Given: In the population, the average IQ is 100 with a population standard deviation of 15.  A team…

Q: A snack food manufacturer estimates that the variance of the number of grams of carbohydrates in…

A: Given: n=22s2=1.35α=0.05

Q: If there are 4 scores per group and the t value is 2.34, what is the p value for a two-tailed test…

A: Note: Thank you for the question. Since it is given that, there are 4 scores per group we are…

Q: A sample of n = 9 scores has a variance of s2 = 36. What is the estimated standard error for the…

A: Estimated standard Error of Mean =    Given, n=9 S2=36 Therefore substitute n,S2   in above…

Q: The model below was fitted to a random sample of 30 families in order to explain household…

A: Obtain the value of the test statistic.   The value of the test statistic is obtained below as…

Q: Consider a population with variance 41 and mean 1. What is the z-score for a the value x = 20? Round…

A: Given: Variance= 41 Mean =1 To find: z-score for the value x=20

Q: If all other values are held constant, what happens to the value of t when sample size increases ?

A: The formula to calculate t value (test statistic) can be written as:

Q: Find the corresponding z-score for a sample of n = 16  and M = 38 taken from a population with a…

A: X¯ ~ N(μx¯ , σx¯) μ= 40 and σ = 8,  n = 16  and M = 38

Q: A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 6.  In this sample,…

A:

Q: A repeated-measures ANOVA was calculated with df = 1, 14. If the same data were analyzed with a…

A: here degree of freedom = n-2 = 14

Q: A two-sided t-test for a population mean is conducted with H0:  = 80. If a 99 percent t-interval…

A: Confidence intervals use data from a sample to estimate a population parameter. Hypothesis tests use…

Q: You are asked to calculate the 94% Cl for the mean value of a normally distributed population with…

A:

Q: A sample of N = 9 individuals participates in a repeated measures study that produces a sample mean…

A: The hypotheses are given below: Null hypothesis: H0:μd=0 Alternative hypothesis: H1:μd&gt;0 The…

Q: For a data set of brain volumes ​(cm3​) and IQ scores of twelve ​males, the linear correlation…

A: We have given that IQ scores of twelve ​males, the linear correlation coefficient is found and…

Q: = 8 and

A: Here it is given that - n=4 ∑X=8 ∑X2 = 40

Q: sample with SS=30 and a variance of s2 =10 has n=4 scores. True or False?

A: Given that  Sum of squares (SS) = 30 Variance ( s2) = 10 Sample size (n) = 4   We know that…

Q: The table to the right shows the cost per ounce (in dollars) fora random sample of toothpastes…

A: For the give data Find F= ?

Q: From a population of 500 elements, a sample of 225 elements is selected. it is known that the…

A: