You intend to conduct a goodness-of-fit test for a multinomial distribution with 4 categories. You collect data from 96 subjects. What are the degrees of freedom for the x² distribution for this test? d.f. =

Q: Monkeys-R-Us claims that the price variance is higher at the dreaded Monkeys Inc. In a random sample…

A: Given that: Variance at Monkeys Inc., s12=22500 Variance at Monkeys-R-Us, s22=15500 Sample size…

Q: find the test value used to test the claim that the proportion of jellyfish stings at jones beach is…

A: Given, Sample size = 696 Sample proportion = 0.30   The null and alternative hypothesis is:

Q: The P-value for this sample

A: From part a), the degrees of freedom is 4. The test statistic is 42.37.

Q: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

A:

Q: What information is provided by the sign (+/–) of a z-score? What information is provided by the…

A: Let, the dataset scores have a mean µ and standard deviation σ. Then the z score of a given score ,…

Q: Explain Multiple Observation Summary of Z-test?

A: A Z-test is a statistical test, used to determine whether two population means are different when…

Q: You are performing a left-tailed test with test statistic z=-0.55, find the p-value.

A: Given that a left-tailed test with test statistic z=-0.55.

Q: (c) Find the 20 th percentile of the sample mean.

A: (c) Given that, The 20th percentile of sample mean is,

Q: median and IQR

A: IQR is the Interquartile range it is also called midspread or it denoted the middle 50% of the…

Q: What is percentage of variance explained (r2)? What info does it tell you about the independent…

A: What is percentage of variance explained (r2)=Square of correlation coefficient   What info does it…

Q: Describe a continuous psychological variable and a population you would like to study.  Given your…

A:

Q: Explain about why z Test Is Appropriate.

A: The z test is basically a statistical test for testing whether is there any difference between…

Q: The p-value is correct, but the z-score is incorrect

A: It is given that a sample of 200 homes sold in which 113 homes with sales prices over median and 87…

Q: How do i find the test statistic and the p-value?

A: The sample sizes are 22 and 22.

Q: The mean always has a z-score (value) →

A: When the data is converted into z scores, the mean will always end up being zero.

Q: What is the difference? Please lay out the rules.

A: Hypothesis is the act in statistics in which analyst check the assumptions regarding the population…

Q: What is the important concept in inferential statistics? Explain it.

A: Descriptive and inferential statistics: Descriptive statistics concerned with describing the target…

Q: Determine the probability of seeing a Z score of -5.28 or one with a larger absolute value.

A: Z = -5.28 P( Z > -5.28) = 1 – P(Z < -5.28) = 1 – 0 = 1 P(Z < -5.28) = 0 (From Excel…

Q: What happens to the interval as you increase the confidence of the sampling distribution?

A: As the confidence level increases the width of the confidence interval increases and as the…

Q: Find the value of X2 values that separate the middle 80 % from the rest of the distribution for 20…

A:

Q: How is the shape of the F distribution affected by the degrees of freedom?

A: Given data How is the shape of F distribution affected by the degrees of freedom

Q: When do we use a t-statistic instead of a z-statistic to help infer a mean?

A: Hypothesis tests are used to test population claims. It has two population statements, where one is…

Q: What is the difference between binomial distribution and geometric distribution? When to use each?…

A: The binomial distribution is the discrete probability distribution The pmf of the binomial…

Q: What is the z-score boundary for the bottom 2.5% of the distribution?

A: To find the z-score for the bottom 2.5% of the distribution.

Q: P (mean or median) = P (mean) +P(median) – P (mean and median), to find the probability that a…

A: From the given information, The addition rule is, P(mean or median)=P(mean)+P(median)-P(mean and…

Q: what does it mean to have a z-score between -1 and 1? Does that include decimals like 0.341 and…

A: A standard Z-score describes the number of standard deviations above or below the mean.

Q: Can you explain how you find the p-value of the test statistic

A: The test statistic is -2.25 and the degrees of freedom is 80.

Q: How do I find P-value using z score?

A: P-value from Z-score

Q: how do i calculate a z score or find the X-Value and determine if a score is usual or unusual

A: A z-score measures exactly how many standard deviations above or below the mean a data point is.