For a normal distribution, identify the z-score location that would seperate the distribution into two sections so that there is a) 20% in the tail on the right-hand side b) 10% in the tail of the left-hand side

An immunologist wants to compare two rabies vaccines. People who had previously received the vaccine were divided into two groups. The first group received a booster dose of type I vaccine and the second group received a booster dose of type II vaccine. Two weeks later the antibody level was measured. The average number of antibodies in each group appears in the following table: Do these data indicate that there is a difference in the effectiveness of the two vaccines used for booster doses? Assume a normal distribution and equal population variances. What type of hypothesis test will allow us to reach a conclusion in the situation posed above? A. Variance test B. Unilateral for difference in proportions C. Bilateral for average difference D. Unilateral for change in effectiveness

Is the distribution of marital categories in the GSS representative of their distributions in the population? Let’s assume that in the U.S.:  married = 48%, widowed = 6%, divorced = 12%, separated = 2%, never married = 32%.  In the 2018 GSS, MARITAL is coded:  1=married, 2=widowed, 3=divorced, 4=separated, and 5=never married.  Interpret the output and provide the output from this test as a part of your answer.  Discuss your interpretation of the results using APA format.   1.) Assumption? 2.) Level of measurement? 3.) Null hypothesis? 4.) Research hypothesis? 5.) Select the sampling distribution and establish the critical region? 6.) Compute the test statistics? 7.) Interpret the results using APA format? *Use the graphs inserted below in images.

In a normal distribution, what z-scores separate the middle 90% from the extreme 10% in the tails?   A +/- 1.28   B +/- 1.64   C +/- 1.96   D +/- 1.44

What position in the distribution corresponds to a z-score of z = +2.00?​

what proportation of a normal distribution is located between each of the following z-score boundaries? a. z=-1.64 and z=+1.64 b. z=-1.96 and z=+1.96 c. z=-1.00 and z=+1.00

A survey of 2255 randomly selected US adults found that 51% said they know all or most of their neighbors. Find 90% CI for the proportion of US adults they know most or all their neighbors. The sample size of 200 is large enough to use a normal distribution.

To test the belief that sons are taller than their fathers, a student randomly selects 13 fathers who have adult male children. She records the height of both the father and son in inches and obtains the following data. Are sons taller than their fathers? Use the a = 0.025 level of significance. Note: A normal probability plot and boxplot of the data indicate that the differences are approximately normally distributed with no outliers. Click the icon to view the table of data. ... Which conditions must be met by the sample for this test? Select all that apply. D A. The sampling method results in an independent sample. - X O B. The sample size must be large. c. The sampling method results in a dependent sample. Table of height data YD. The sample size is no more than 5% of the population size. Height of Father, X, Height of O Son, Y LE. The differences are normally distributed or the sample size is large. 71.1 76.2 Let d, = X, - Y,. Write the hypotheses for the test. 68.8 72.3 67.9 70.3…

Find the z-score boundaries that separate a normal distribution as described in each of the following. (4 points) The middle 36% from the 64% in the tails. The middle 60% from the 40% in the tails.

The average number of cavities that thirty-year-old Americans have had in their lifetimes is 7.  Do twenty-year-olds have a different number of cavities? The data show the results of a survey of 13 twenty-year-olds who were asked how many cavities they have had. Assume that the distribution of the population is normal. 9, 8, 8, 10, 10, 9, 9, 10, 6, 6, 9, 8, 8 What can be concluded at the α = 0.01 level of significance? The p-value = _______  (Please show your answer to 4 decimal places.) The p-value is _______    α Based on this, we should _________     the null hypothesis.