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a. H0: μ = 873; Ha: μ ≠ 873 (claim)

Based on the results above, can we conclude that more than 95% of adults know twitter?

Find the critical value and rejection region for the type of z-test with level of significance α. Left-tailed test, α = 0.01

State the hypotheses. A laptop manufacturer claims that the mean life of battery for a certain model of laptop is more than 12 hours.

Google hires you to find how many people buy tutoring services online. How many adults need to be surveyed for 99% CL that sample is no more than 4% n= ((Z_(a/2)) ^2 (p)(q)/ (E)^2 or n= ((Z_(a/2)) ^2 (.25)/ (E)^2 Census reveals 75% use tutoring service online p= q= Z_(a/2) =

Find the critical value and rejection region for the type of z-test with level of significance α. Left-tailed test, α = 0.01

State the hypotheses. A laptop manufacturer claims that the mean life of battery for a certain model of laptop is more than 12 hours.

Because ___ is rarely known, the confidence interval estimates of ____ almost _____ use the t distribution instead of the normal distribution

In 431 NFL Games that went into overtime 200 teams that won the coin toss won the game. Find the P( Atleast 200 wins) n = p = µ = np σ = square root of (npq)

Which value of r indicates a stronger correlation: r = 0.835 or r =- 0.797? Explain your reasoning. Choose the correct answer below.