Find the critical value z Subscript c necessary to form a confidence interval at the level of confidence shown below.
Home
Find the critical value z Subscript c necessary to form a confidence interval at the level of confidence shown below.
feel free to call us +800.241.0630 russ@russellcoder.com
Related Articles


Find the margin of error for the given values of c, sigma, and n.
russellc, , Statistics, 0
c = 0.95. a = 2.1, n = 36 Answer 0.686

A random sample of 75 eighth grade students’ scores on a national mathematics assessment test has a mean score of 278. This test result prompts a state school administrator to declare that the mean score for the state’s eighth graders on this exam is more than 275. Assume that the population standard deviation is 36. At alphaequals0.12, is there enough evidence to support the administrator’s claim? Complete parts (a) through (e).
russellc, , Statistics, 0
see excel spreadsheet. This your answer

For the statement below, write the claim as a mathematical statement. State the null and alternative hypotheses and identify which represents the claim. A laptop manufacturer claims that the mean life of the battery for a certain model of laptop is more than 5 hours
russellc, , Statistics, 0
Part A is just stating the the claim numberically with is u >5. Part B = Ho is the...

Use the given statement to represent a claim. Write its complement and state which is Upper H 0 and which is Ha. a is not equal to 14
russellc, , Statistics, 0
Part A is the answer. A. Pick the opposite of the "equation" see excel spreadsheet. This your answer B....

You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals. A random sample of 60 home theater systems has a mean price of $140. Assume the population standard deviation is $15.40 Construct a 90% confidence interval for the population mean. The 90% confidence interval is (nothing,nothing).
russellc, , Statistics, 0 
Find the minimum sample size n needed to estimate p for the given values of c, a, and E.
russellc, , Statistics, 0
c = 0.90. a = 9.9. and E = 2 Answer = 67

Match each Pvalue with the graph that correctly displays its area.
russellc, , Statistics, 0
Pequals=0.2709 Pequals=0.0793 Pequals=0.0286 Pequals=0.0143 see excel spreadsheet. This your answer