repeated-measures study comparing two treatments with n = 4 participants produces MD = 2 and s2 = 25 for the difference scores. What is the estimated standard error for the sample mean difference?

The claim is that for a smartphone​ carrier's data speeds at​ airports, the mean is μ=11.00 Mbps. The sample size is n=21 and the test statistic is t=1.796.   what is the p-value?

Professor Jennings claims that only 35% of the students at Flora College work while attending school. Dean Renata thinks that the professor has underestimated the number of students with part-time or full-time jobs. A random sample of 80 students shows that 37 have jobs. Do the data indicate that more than 35% of the students have jobs? Use a 5% level of significance.What are we testing in this problem? single proportionsingle mean     (a) What is the level of significance?State the null and alternate hypotheses. H0: p = 0.35; H1: p < 0.35H0: μ = 0.35; H1: μ ≠ 0.35    H0: μ = 0.35; H1: μ < 0.35H0: p = 0.35; H1: p > 0.35H0: p = 0.35; H1: p ≠ 0.35H0: μ = 0.35; H1: μ > 0.35 (b) What sampling distribution will you use? What assumptions are you making? The Student's t, since np < 5 and nq < 5.The Student's t, since np > 5 and nq > 5.    The standard normal, since np > 5 and nq > 5.The standard normal, since np < 5 and nq < 5. What is the value of the…

You are conducting a study to see if the accuracy rate for fingerprint identification is significantly more than 0.12. You use a significance level of a = 0.10. Ho:p = 0.12 H1:p > 0.12 You obtain a sample of size n = 410 in which there are 58 successes.

You are conducting a study to estimate the mean height of students in a university. The university has 10,000 students. If you want to achieve a margin of error of no more than 2 inches with 95% confidence, what sample size should you select?

Suppose a statistician named Big Daddy thinks that the average monthly electric bill for Houston in August is more than $150.   Using sample data  from a normal population, Big Daddy obtains a test statistic of z = 1.06.  Determine the P-value and state the conclusion at the 5% level of significance.

To calculate a z-score to compare against a critical value in the single sample z test, we divide the observed mean differences(sample mean-population mean) by what value?

What effect does increasing the sample size have on the population standard deviation? I know that it decreases, but why?

A researcher reports an F-ratio with dfbetweenbetween = 2 and dfwithinwithin = 30 from an independent-measures ANOVA. How many treatment conditions were compared in the experiment? 2   3   11   30     How many subjects participated in the experiment? 32   30   33   11

An ANOVA is used to evaluate the mean differences among three treatment conditions with a sample of n = 12 participants in each treatment. For this study, what is dfwithin treatment?