Calculate the valuc of the one-sample z- statistic.

Q: What is the probabilty distribution of a statistic is called?

A: Given that, Probability distribution of statistic

Q: if other factors are held constant, as a sample size decreases, the estimated standard error?_____

A: Different types of standard errors are described below.

Q: If nothing else changed besides an increase in sample size, the test statistic  would be *fill in…

A: The test statistic: A function of sample observations that are used to test H0 is called a test…

Q: What is the conclusion about the t-statistic and the p-value?

A: Decision rule: If p-value ≤ α, then reject the null hypothesis. Otherwise, fail to reject the null…

Q: What are Z scores?

A:

Q: What is the test statistic?

A: At Rachel's 11th birthday party, B-girls were timed to see how long ( in seconds ) they could hold…

Q: What is a Z score and why is it useful?

A:

Q: calculate the test statistic

A: here given table for calculate chi-square test statistic

Q: The alternative hypothesis for an ANOVA states that

A: ANOVA: In one factor ANOVA model only one factor is studied, that is only the effect on one factor…

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) Is X a complete sufficient statistic?

A:

Q: What is the test statistic and the p-value

A: here use matched pair t test because sample remain same but treatment on same sample performed

Q: Given the results of the ANOVA (in the picture), which of the following is NOT correct?

A: Decision rule: If F-statistic is greater than F-crit, the null hypothesis is rejected. If…

Q: Are these samples independent or paired?

A: When the two observations are taken on same individual then the samples are said to be paired.

Q: Compute the test statistics.

A: Given that Sample size n = 36 Sample mean = 40 Sample SD = 12

Q: With mound-shaped data, what proportion of the mea- surements have z-scores between-3 and 3?

A: From the provided information, The data is mound shaped. A mound shaped data is sometimes called…

Q: What is the key difference between an independent and a dependent samples t-test?

A: Solution-: What is the key difference between an independent and a dependent samples t-test?

Q: Based on a suitable statistic, find out the counter with more consistent performance.

A: Determine the data points for the both the counter from stem and leaf plot: Counter A Counter B…

Q: What is the mean for the z score distribution?

A:

Q: The range of possible values for the Durbin-Watson statistic is

A: The Durbin- Watson statistic is used for test whether there is autocorrelation in residuals or not.

Q: In one-way ANOVA, identify a statistic that measures a. the variation among the sample means. b. the…

A: From the given information, In one-way ANOVA, the required statistics that measures the variation…

Q: What does the three F ratios in a two-factor ANOVA is based?

A:

Q: In a recent study, the Centers for Disease Control and Prevention reported that in a sample of 4,349…

A: Here, n = 4349 and p = 0.08.

Q: What is the formula for STANDARDIZED EFFECT SIZE, COHEN’S d (TWO INDEPENDENT SAMPLES)?

A:

Q: In which class does the quartile 1 located?

A: Solution-: We have given the following table: Class No. Class Intervals Class Boundaries Lower…

Q: Calculate the test statistic,

A: Given that sample size is n = 76 And number of peoples who said they are confident of meeting their…

Q: 10. What is the computed test statistic?

A: It is given that Sample size n = 100 Sample mean M = 144 Population SD = 20 Population mean = 150

Q: What is the difference between a normal and binomial distribution?

A: Statistics uses normal distributions more often than binomial distributions most of the time.…

Q: Explain the Process of Computing the p-value using the F-statistic?

A:

Q: What is the correct interpretation of Jackson’s z-score?

A: The z-score value is 1.10.

Q: What is the significance of a z-score?

A: The value of z score tells that how many standard deviations the data is spread away from mean. The…

Q: Find the variance of the probabilty distribution for the histogram

A:

Q: Transforming raw scores into z scores allows researchers to

A: By converting a raw score to a z- score, we are expressing that score on a z-score scale, which…

Q: What does it mean that the variance (computed by dividing by N) is a biased statistic?

A:

Q: the ____ focuses only on the middle 50 percent of the cases in a distribution.  -interquartile…

A:

Q: State the one-way ANOVA identity, and interpret its meaning with regard to partitioning the total…

A: One-way ANOVA identity is given below: SST=SSTR+SSE

Q: Explain why is it important to use ANOVA instead of several t tests to evaluate differences between…

A: Using several t -test, increase the type I error. In anova type I error is less as compare to t-test…

Q: It is not important to collect samples randomly. True or false

A: Any sample must be collected using the random techniques. If the samples are not collected randomly…

Q: Determine the critical value for a left tailed test of a population mean at the a=0.005 level of…

A: The test is of a population mean.The sample size is 30, that is large enough for assuming normality…

Q: The Durbin-Watson statistic is based on the

A: The Durbin-Watson statistic is used to check whether the autocorrelation present in residuals or…

Q: Compute the test statistic (z-observed) for the mentioned sample

A: The sample mean is 4.9, the population standard deviation is 1.8 and the sample size is 36.

Q: What does a statistically significant t test indicates?

A: Statistical significance: In the study, when the result obtained is very unlikely to occur just by…

Q: Perform the analysis of variance (ANOVA) at the 5% significance level to identify is there any…

A: Excel Procedure: Enter the data for 1, 2, 3 in Excel sheet>Go to Data Menu>Click on Data…

Q: What is the Positively Skewed Distribution?

A: Skewed distribution is basically the one where the population data is not normally distributed. It…

Q: Opposing a random sample of size and equal 16A sample average of 185 it is observed the P value of…

A: Given sample size n = 16  and sample mean = 185  We have to find the p-value of the sample statistic…

Q: What is the Standard test statistic?

A: Hypotheses:

Q: if the original distribution is positively skewed, what is the distribution of z scores?

A: Given : Positively skewed distribution . It is also known as right-skewed distribution Here ,…

Q: What is the relationship between the sampling variance of an OLS parameter estimate, and the total…

A: Sampling variance is the variance of the sampling distribution for a random variable. It measures…

Q: Under what circumstances will the distribution of sample means be normal?​

A: