Based on new water standards for manufacturers in the

Reference no: EM13632763

An import threshold for mercury in crayfish is 9 parts per billion (ppb). A study obtained a random sample of 120 crayfish from a large lake. Of these, 24 have levels of mercury that exceeded 9 ppb. Past research had shown that 25% of the crayfish had levels that exceed 9 ppb. Based on new water standards for manufacturers in the region, they wanted to see if there was a change in contamination in crayfish. What are the appropriate null and alternative hypotheses? (NE means not equal.)

A. Ho: p = .25 and Ha: p > .25

B. Ho: p = .25 and Ha: p NE .25

C. Ho: p = .25 and Ha: p > .20

D. Ho: p = .25 and Ha: p < .25

Reference no: EM13632763

Questions Cloud

A if a sample of gold with a mass of 2478 g is pressed into : gold which has a density of 19.32 gcm3 is the most ductile metal and can be pressed into a thin leaf or drawn out into

Calculate the specific work kjkg required for the : saturated liquid water is compressed from 100 kpa state 1 to 2.5 mpa state 2 in an adiabatic pump having 85 isentropic

Two charges are placed on the x axis one charge q1 185 : two charges are placed on the x axis. one charge q1 18.5 microc is at x1 3.0 cm and the other q2 -13 microc is at x2

A 1000-hertz tone issuing from a loudspeaker has an : a 1000-hertz tone issuing from a loudspeaker has an intensity level of 100 db at a distance of 2.5 m. if the speaker is

Based on new water standards for manufacturers in the : an import threshold for mercury in crayfish is 9 parts per billion ppb. a study obtained a random sample of 120

Calculate the entropy change for this process and the : 2 moles of an ideal gas expands isothermally and reversibly from 50.0 dm3 to 85.8 dm3 at a temperature of 68.9

A hypothesis test for a population proportion p is given : a hypothesis test for a population proportion p is given below ho p 0.25 vs. ha p ne 0.25 ne means not equal for

Determine the power in hp delivered by the motor a when the : the elevator e has a weight of 6600lb when fully loaded and is connected as shown to a counterweight w of weight of

The fastest growing plant on record is the hesperoyucca : the fastest growing plant on record is the hesperoyucca whipplei. suppose a plant of this type grows 1.8 m in 14 days.

User Account

All Pages