Use the given information to find the number of degrees of freedom, the critical values x and and the confidence interval estimate of o. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 80% confidence; n= 28, s = 65.2. E Click the icon to view the table of Chi-Square critical values. df = E (Type a whole number.)

Round correctly. Thank you.

A population of scores has a mean of µ=89, a median of 87 and a mode of 85. What is the most likely shape for the population distribution? Symmetrical Positively skewed Negative skewed It cannot be determined from the information given O O

Construct a confidence interval for μd , the mean of the differences d for the population of paired data. Assume that the population of paired differences is normally distributed.Using the sample paired data below, construct a 99% confidence interval for the population mean of all differences x - y. x 5.1 4.4 4.2 2.6 7.6 y 4.8 3.2 3.8 3.3 5.3

Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96

Application Exercise: Dr. Butler is interested in the preference for dog breeds among college students. She collected the observed frequencies below and wants to know if the breeds are equally preferred. What can be concluded with an a of 0.05? Irish Setter Golden Retriever Papillon Great Dane 101 94 135 97 L What is the appropriate test statistic? -Select Compute the statistic selected in : M Obtain/compute the appropriate values to make a decision about Hg. Critical Value = | J: Test Statistic = Decision: -Select- N Compute the corresponding effect size(s) and indicate magnitude(s). If not appropriate, input and/or select "na" below. Effect Size = | ]: Magnitude: -Select-- Make an interpretation based on the results. O There is a significant relationship between dog breeds and college students. There is a significant dog breed preference among college students. O Dog breeds are equally preferred among college students.

Construct the indicated confidence interval for the population mean y using the t- distribution. Assume the population is normally distributed. C=0.99, x=12.6,  s= 0.81, n=17